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Laser Additive Manufacturing of 316L Stainless Steel Thin-wall Ring Parts
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作者 Yanhua Zhao Wenhao Tian +3 位作者 Jianhua Liu Dongqing Qian Wei Meng Jiaming Wang 《Fluid Dynamics & Materials Processing》 EI 2023年第2期451-470,共20页
The process parameters of laser additive manufacturing have an important influence on the forming quality of the produced items or parts.In the present work,a finite element model for simulating transient heat transfe... The process parameters of laser additive manufacturing have an important influence on the forming quality of the produced items or parts.In the present work,a finite element model for simulating transient heat transfer in such processes has been implemented using the ANSYS software,and the temperature and stress distributions related to 316L stainless steel thin-walled ring parts have been simulated and analyzed.The effect of the laser power,scanning speed,and scanning mode on temperature distribution,molten pool structure,deformation,and stress field has been studied.The simulation results show that the peak temperature,weld pool size,deformation,and residual stress increase with an increase in laser power and a decrease in the scanning speed.The scanning mode has no obvious effect on temperature distribution,deformation,and residual stress.In addition,a forming experiment was carried out.The experimental results show that the samples prepared by laser power P=800 W,V=6 mm/s,and the normal scanning method display good quality,whereas the samples prepared under other parameters have obvious defects.The experimental findings are consistent with the simulation results. 展开更多
关键词 Laser additive manufacturing 316l stainless steel temperature field stress field
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EFFECT OF NANOCRYSTALLINE AND TWIN BOUNDARIES ON CORROSION BEHAVIOR OF 316L STAINLESS STEEL USING SMAT 被引量:10
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作者 A.Q. Lü Y. Zhang +3 位作者 Y. Li G. Liu Q.H. Zang C.M. Liu 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2006年第3期183-189,共7页
By means of surface mechanical attrition treatment ( SMAT), the groin size with a diameter of aboat 60hm formed at about 20μm depth and numerous mechanical twins at about 50μm depth from the treated surface were ... By means of surface mechanical attrition treatment ( SMAT), the groin size with a diameter of aboat 60hm formed at about 20μm depth and numerous mechanical twins at about 50μm depth from the treated surface were synthesized in 316L stainless steel because of the different distributions of strain and strain rate along depth orientation. For instance the maximum strain rate reached 10^3-10^4s^-1 on the top surface. The relationship between the microsturcture and the corrosion property was studied in 0.05M H2SO4+ 0.25M Na2SO4 aqueous solution, and the results show an extreme improvement of corrosion resistance owing to the appearance of twin boundaries and the obvious reduction in corrosion resistance attributed to the presence of nanocrystaline boundaries. 展开更多
关键词 surface mechanical attrition treatment 316l stainless steel corrosion property twin boundary nanocrystaline boundary
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Erosion-corrosion behavior of Pd-Co and Pd-Cu films on 316L stainless steel in simulated PTA slurry environment
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作者 李思锐 左禹 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2016年第1期167-174,共8页
Pd-Co films with the Co content varying from 21.9% to 34.62%(mole fraction) and Pd-Cu(5% Cu, mole fraction) film were electrodeposited on 316 L stainless steel, and the erosion-corrosion resistance of the Pd-Co an... Pd-Co films with the Co content varying from 21.9% to 34.62%(mole fraction) and Pd-Cu(5% Cu, mole fraction) film were electrodeposited on 316 L stainless steel, and the erosion-corrosion resistance of the Pd-Co and Pd-Cu plated samples in a simulated boiling pure terephthalic acid(PTA) slurry environment was studied with methods of mass loss test, polarization measurement and scanning electron microscopy(SEM). Under the static state condition, both the Pd-Cu and Pd-Co plated samples exhibit good corrosion resistance and the Pd-Cu film behaves slightly better. However, with increasing the stirring speed, the corrosion rate of the Pd-Cu plated samples increases obviously while that of the Pd-Co plated samples shows only slight increase. Higher microhardness and lower surface roughness of Pd-Co film than those of Pd-Cu film, as well as good corrosion resistance, may be the main reasons for better erosion-corrosion resistance in the strong reductive acid plus erosion environment. 展开更多
关键词 Pd-Co film Pd-Cu film 316l stainless steel ELECTROPLATING EROSION-CORROSION PTA environment
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Physico-chemical properties and microstructure of hydroxyapatite-316L stainless steel biomaterials 被引量:5
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作者 邹俭鹏 阮建明 +2 位作者 黄伯云 刘建本 周小霞 《Journal of Central South University of Technology》 2004年第2期113-118,共6页
Sintering shrinkage, compressive strength, bending strength, metallurgical morphology, microstructure and chemical composition diffusion of hydroxyapatite-316L stainless steel(HA-316L SS) composites were investigated.... Sintering shrinkage, compressive strength, bending strength, metallurgical morphology, microstructure and chemical composition diffusion of hydroxyapatite-316L stainless steel(HA-316L SS) composites were investigated. The results show that the sintering shrinkage of HA-316L SS composites decreases from 27.38% to 8.87% for cylinder sample or from 27.18% to 8.62% for cuboid sample with decreasing the volume ratio of HA to 316L SS, which leads to higher sintering activity of HA compared with that of 316L SS. The compressive strength of HA-316L SS composites changes just like parabolic curve (245.3→126.3→202.8 MPa) with reducing the volume ratio of HA to 316L SS. Bending strength increases from 86.3MPa to 124. 2 MPa with increasing the content of 316L SS. Furthermore, comprehensive mechanical properties of 1.0∶3.0 (volume ratio of HA to 316L SS) composite are optimal with compressive strength and bending strength equal to 202.8 MPa and 124.2 MPa, respectively. The (microstructure) and metallurgical structure vary regularly with the volume ratio of HA to 316L SS. Some chemical reaction takes place at the interface of the composites during sintering. 展开更多
关键词 hydroxyapatite-316l stainless steel biomaterial sintering activity mechanical property MICROSTRUCTURE SEM EDXA
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Electrochemical characteristics of electroplating and impregnation Ni-P/SiC/PTFE composite coating on 316L stainless steel 被引量:3
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作者 GAO Ping-ping GAO Mei-lian +6 位作者 WU An-ru WU Xiao-bo LIU Chun-xun ZHANG Yang ZHOU Hai-kun PENG Xiao-min XIE Zhi-yong 《Journal of Central South University》 SCIE EI CAS CSCD 2020年第12期3615-3624,共10页
Ni-P/SiC/PTFE coating was obtained on the surface of 316L stainless steel by electrodeposition of Ni-P/SiC coating and immersion of PTFE(polytetrafluoroethylene).The surface morphology and composition were analyzed by... Ni-P/SiC/PTFE coating was obtained on the surface of 316L stainless steel by electrodeposition of Ni-P/SiC coating and immersion of PTFE(polytetrafluoroethylene).The surface morphology and composition were analyzed by scanning electron microscope and energy dispersive spectrometer.The corrosion resistance of the coating in 0.5 mol/L H2SO4+2×10−6 HF solution was studied by electrochemical method.Surface contact angle was used to test the hydrophobic properties of the coating.The results indicated that the Ni-P/SiC/PTFE coating prepared on the surface of stainless steel was uniform and compact,which significantly improved the self-corrosion potential of stainless steel.The self-corrosion current density decreased from 7.62 to 0.008μA/cm2.The durability performance of coating was tested under 0.6 V voltage and the stable corrosion current density value was 0.19μA/cm2,then wetting angle was tested after durability experiment and the value is 134.5°. 展开更多
关键词 316l stainless steel electroplate NI-P PTFE SiC corrosion resistance
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Gelcasting of 316L stainless steel 被引量:3
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作者 Yan Li Zhimeng Guo Junjie Hao 《Journal of University of Science and Technology Beijing》 CSCD 2007年第6期507-511,共5页
A novel near-net process, gelcasting, was successfully used to prepare larger size 316L stainless steel parts with complex shape. In this study, the effects of process parameters on the viscosity of the slurry and the... A novel near-net process, gelcasting, was successfully used to prepare larger size 316L stainless steel parts with complex shape. In this study, the effects of process parameters on the viscosity of the slurry and the dry green strength were investigated. The results show that gas atomization (GA) powder is more suitable for gelcasting compared with water atomization (WA) powder. The maximum solid loading is 55vo1% for ball-milled slurry with GA powders. And the optimum amounts of monomers (acrylamide (AM)+methylenebisacrylamide (MBAM); the mass ratio, 30:1) and initiator in the AM system are 1.8% (based on the weight of metal powder) and 0.8%-1.4% (based on the weight of monomers), respectively, at which, the maximum green strength obtained is 33.7 MPa. The mechanical properties of the sintered specimen are as follows: ultimate tensile strength, 493 MPa; yield strength, 162 MPa; and HRB, 72. 展开更多
关键词 GELCASTING 316l stainless steel complex-shape SLURRY green strength
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Passivation Mechanism of 316L Stainless Steel in Oxidizing Acid Solution 被引量:2
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作者 Xuanyi Wang, Yinshun Wu, Lin Zhang, Baofeng Ding (Corrosion and Protection Centre, University of Science and Technology Beijing, Beijing 100083, China) 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2000年第3期204-208,共5页
The compositions and the chemical valence states of elements of 316L stainless steel passive film formed in the oxidizing acid solution were studied by X-ray Photoelectron Spectroscopic (XPS) analysis. The electrochem... The compositions and the chemical valence states of elements of 316L stainless steel passive film formed in the oxidizing acid solution were studied by X-ray Photoelectron Spectroscopic (XPS) analysis. The electrochemical polarization curve was measured. The passivation process in the oxidizing acid solution was studied by AC impedance technology. The results indicated that the stable compounds layer was formed on the surface of the sample and the adsorption was the main step in the nitrite solution during passivation process. The catalysis passivation mechanism was put forward according to the experimental results. During passivation process, the water molecule was adsorbed on the surface of the sample at first in the oxidizing acid solution. The oxidizer in the solution played a role as catalyst. The oxide and hydroxide, which could be changed each other and finally formed stable passive film, were generated from adsorbing intermediate under the catalytic action. The mathematical models for predicting the steady polarization curve and the AC impedance spectra at certain conditions have been obtained. The passivation mechanism of 316L stainless steel in the oxidizing acid solution can be interpreted by the catalysis passivation mechanism. 展开更多
关键词 316l stainless steel passive film XPS AC impedance spectra passivation mechanism
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Laser ultrasonic testing for near-surface defects inspection of 316L stainless steel fabricated by laser powder bed fusion 被引量:2
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作者 Ting Dai Xiao-jian Jia +6 位作者 Jun Zhang Jin-feng Wu Yi-wei Sun Shu-xian Yuan Guan-bing Ma Xiao-jing Xiong Hui Ding 《China Foundry》 SCIE CAS 2021年第4期360-368,共9页
The laser powder bed fusion(L-PBF)method of additive manufacturing(AM)is increasingly used in various industrial manufacturing fields due to its high material utilization and design freedom of parts.However,the parts ... The laser powder bed fusion(L-PBF)method of additive manufacturing(AM)is increasingly used in various industrial manufacturing fields due to its high material utilization and design freedom of parts.However,the parts produced by L-PBF usually contain such defects as crack and porosity because of the technological characteristics of L-PBF,which affect the quality of the product.Laser ultrasonic testing(LUT)is a potential technology for on-line testing of the L-PBF process.It is a non-contact and non-destructive approach based on signals from abundant waveforms with a wide frequency-band.In this study,a method of LUT for on-line inspection of L-PBF process was proposed,and a system of LUT was established approaching the actual environment of on-line detection to evaluate the method applicability for defects detection of L-PBF parts.The detection results of near-surface defects in L-PBF 316L stainless steel parts show that the crack-type defects with a sub-millimeter level within 0.5 mm depth can be identified,and accordingly,the positions and dimensions information can be acquired.The results were verified by X-ray computed tomography,which indicates that the present method exhibits great potential for on-line inspection of AM processes. 展开更多
关键词 additive manufacturing 316l stainless steel on-line inspection laser ultrasonic testing non-destructive testing
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Experimental Study on Uniaxial and Multiaxial Strain CyclicCharacteristics and Ratcheting of 316L Stainless Steel 被引量:8
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作者 GuoZheng KANG, Qing GAO, Lixun CAI, Xianjie YANG and Yafang SUN Department of Applied Mechanics and Engineering, Southwest Jiaotong University, Chengdu 610031, China 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2001年第2期219-223,共5页
An experimental study was carried out on the strain cyclic characteristics and ratcheting of 316L stainless steel subjected to uniaxial and multiaxial cyclic loading. The strain cyclic characteristics were researched ... An experimental study was carried out on the strain cyclic characteristics and ratcheting of 316L stainless steel subjected to uniaxial and multiaxial cyclic loading. The strain cyclic characteristics were researched under the strain-controlled uniaxial tension-compression and multiaxial circular paths of loading. The ratcheting tests were conducted for the stress-controlled uniaxial tension-compression and multiaxial circular, rhombic and linear paths of loading with different mean stresses, stress amplitudes and histories. The experiment results show that 316L stainless steel features the cyclic hardening, and its strain cyclic characteristics depend on the strain amplitude and its history apparently. The ratcheting of 316L stainless steel depends greatly on the Values of mean stress, stress amplitude and their histories. In the meantime, the shape of load path and its history also apparently influence the ratcheting. 展开更多
关键词 Experimental Study on Uniaxial and Multiaxial Strain CyclicCharacteristics and Ratcheting of 316l stainless steel
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Study of Ce-modified antibacterial 316L stainless steel 被引量:1
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作者 Yuan Junping Li Wei Shen Keya 《China Foundry》 SCIE CAS 2012年第4期307-312,共6页
316L stainless steel is widely used for fashion jewelry, but it can carry a large number of bacteria and bring the risk of infection since the steel has no antimicrobial performance. In this paper, the effects of Ce o... 316L stainless steel is widely used for fashion jewelry, but it can carry a large number of bacteria and bring the risk of infection since the steel has no antimicrobial performance. In this paper, the effects of Ce on the antibacterial property, corrosion resistance and processability of 316L were studied by microscopic observation, thin- film adhering quantitative bacteriostasis, and electrochemical and mechanical tests. The results show that a trace of Ce can distribute uniformly in the matrix of 316L and slightly improve its corrosion resistance in artificial sweat. With an increase in Ce content, the Ce is prone to form clustering, which degrades the corrosion resistance and the processability. The Ce-containing 316L exhibits Hormesis effect against S. aureus. A small Ce addition stimulates the growth of S. aureus. As the Ce content increases, the modified 316L exhibits an improved antibacterial efficacy. The more Ce is added, the better antibacterial capability is achieved. Overall, if the 316L is modified with Ce alone, it is difficult to obtain the optimal combination of corrosion resistance, antibacterial performance and processability. In spite of that, 0.15 wt.%-0.20 wt.% Ce around is inferred to be the best trade-off. 展开更多
关键词 316l stainless steel cerium corrosion resistance antibacterial efficacy processability
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Characterizing modified surface layer of 316L stainless steel treated by high current pulsed electron beam
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作者 GROSDIDIER Thierry 《Rare Metals》 SCIE EI CAS CSCD 2007年第S1期61-66,共6页
High current pulsed electron beam(HCPEB) is now developing as a useful tool for surface modification of materials.When concentrated electron flux transferring its energy into the surface layer of target material withi... High current pulsed electron beam(HCPEB) is now developing as a useful tool for surface modification of materials.When concentrated electron flux transferring its energy into the surface layer of target material within a short pulse time,coupled thermal and stress processes would lead to the formation of metastalbe microstructure with improved properties.In the present work,HCPEB treatment of 316L stainless steel(SS) was carried out and the microstructural changes in modified surface layer were characterized with optical microscopy,X-ray diffractometry and electron backscatter diffractometry(EBSD) techniques.The corrosion resistance of modified surface was measured in a 5wt.% salt solution.The evolution regularity of surface craters and grain refinement effect,as well as the preferred orientation of(111) crystal plane occurring in the HCPEB treatment under different working parameters were discussed along with their influence on corrosion resistance. 展开更多
关键词 high current pulsed electron beam surface modification 316l stainless steel MICROSTRUCTURE CORROSION
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Corrosion and Electrochemical Behavior of 316L Stainless Steel in Sulfate-reducing and Iron-oxidizing Bacteria Solutions
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作者 胥聪敏 张耀亨 +1 位作者 程光旭 朱文胜 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2006年第6X期829-834,共6页
Corrosion and electrochemical behavior of 316L stainless steel was investigated in the presence of aerobic iron-oxidizing bacteria IOB and anaerobic sulfate-reducing bacteria SRB isolated from cooling water systems in... Corrosion and electrochemical behavior of 316L stainless steel was investigated in the presence of aerobic iron-oxidizing bacteria IOB and anaerobic sulfate-reducing bacteria SRB isolated from cooling water systems in an oil refinery using electrochemical measurement, scanning electron microscopy SEM and energy dispersive atom X-ray analysisEDAX. The results show the corrosion potential and pitting potential of 316L stainless steel decrease distinctly in the presence of bacteria, in comparison with those observed in sterile medium under the same exposure time. SEM morphologies have shown that 316L stainless steel reveals no signs of pitting attack in the sterile medium. However, micrometer-scale corrosion pits were observed on 316L stainless steel sur- face in the presence of bacteria. The presence of SRB leads to higher corrosion rates than IOB. The interactions between the stainless steel surface, abiotic corrosion products, and bacterial cells and their metabolic products in- creased the corrosion damage degree of the passive film and accelerated pitting propagation. 展开更多
关键词 sulfate-reducing bacteria SRB iron-oxidizing bacteria IOB 316l stainless steel pitting corrosion electrochemical behavior
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Biocompatibility of MIM 316L stainless steel
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作者 ZHU Shai-hong WANG Guo-hui +3 位作者 ZHAO Yan-zhong LI Yi-ming ZHOU Ke-chao HUANG Bai-yun 《Journal of Central South University of Technology》 2005年第z1期9-11,共3页
To evaluate the bioeompatibility of MIM 316L stainless steel,the percentage of S-period cells were detected by flow cytometry after L929 incubated with extraction of MIM 316L stainless steel,using titanium implant mat... To evaluate the bioeompatibility of MIM 316L stainless steel,the percentage of S-period cells were detected by flow cytometry after L929 incubated with extraction of MIM 316L stainless steel,using titanium implant materials of clinical application as the contrast.Both materials were implanted in animal and the histopathological evaluations were carried out.The statistical analyses show that there are no significant differences between two groups(P>0.05),which demonstrates that MIM 316L stainless steel has a good biocompatibility. 展开更多
关键词 316l stainless steel metal powder injection moulding BIOCOMPATIBILITY flow cytometry
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Sintering behaviors of porous 316L stainless steel fiber felt
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作者 冯萍 刘咏 +3 位作者 王岩 李昆 赵秀云 汤慧萍 《Journal of Central South University》 SCIE EI CAS CSCD 2015年第3期793-799,共7页
Isothermal sintering experiments were performed on the 316 L stainless steel fiber felts with fiber diameters of 8 μm and20 μm. Surface morphologies of the sintered specimens were investigated by using scanning elec... Isothermal sintering experiments were performed on the 316 L stainless steel fiber felts with fiber diameters of 8 μm and20 μm. Surface morphologies of the sintered specimens were investigated by using scanning electron microscopy(SEM) and optical microscopy. The results show that the amount of the sintering necks and the relative densities of the fiber felt increase with the increasing of both the sintering temperature and the sintering time. And the activation energies estimated present a decline at high relative densities for both 8 μm and 20 μm fiber felts. Moreover, the sintering densification of the fiber felts is dominated by volume diffusion mechanism at low temperature and relative densities. As more grain boundaries are formed at higher temperature and relative density, grain boundary diffusion will also contribute to the densification of the specimen. 展开更多
关键词 316l stainless steel fiber felt sintering activation energy diffusion
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Study of TiC+TiN Multiple Films On Type of 316L Stainless Steel 被引量:10
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作者 XUEQi JINYong +2 位作者 HUDong-ping HUANGBen-sheng DENGBai-quan 《材料热处理学报》 EI CAS CSCD 北大核心 2004年第05B期916-920,共5页
In this paper, the synthesis process of TiC+TiN multiple films on super-low-carbon stainless steels is reported. The TiC layer is coated as the first layer in the multiple film, the change of growth rate of the film o... In this paper, the synthesis process of TiC+TiN multiple films on super-low-carbon stainless steels is reported. The TiC layer is coated as the first layer in the multiple film, the change of growth rate of the film on the 316L Stainless steel is not same as the one on carbides substrates, while the mole ratio of CRi to TiCLi (mCH/TiCl4) is changed from 1.2 to 2.0. The Ti [C, N], as a kind of inter-layer between TiC and TiN layers, is helpful to improve the adhesion between the TiC and TiN layer. The cooling rate greatly influences the quality of the adhesion between the TiC+TiN film and substrates. 展开更多
关键词 316l不锈钢 CVD TIC TIN 复合薄膜
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Anisotropy in mechanical properties and corrosion resistance of 316L stainless steel fabricated by selective laser melting 被引量:8
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作者 Xiao-qing Ni De-cheng Kong +5 位作者 Ying Wen Liang Zhang Wen-heng Wu Bei-bei He Lin Lu De-xiang Zhu 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2019年第3期319-328,共10页
The corrosion behavior and mechanical properties of 316 L stainless steel(SS) fabricated via selective laser melting(SLM) were clarified by potentiodynamic polarization measurements, immersion tests, and tensile exper... The corrosion behavior and mechanical properties of 316 L stainless steel(SS) fabricated via selective laser melting(SLM) were clarified by potentiodynamic polarization measurements, immersion tests, and tensile experiments. The microstructural anisotropy of SLMed 316 L SS was also investigated by electron back-scattered diffraction and transmission electron microscopy. The grain sizes of the SLMed 316 L SS in the XOZ plane were smaller than those of the SLMed 316 L SS in the XOY plane, and a greater number of low-angle boundaries were present in the XOY plane, resulting in lower elongation for the XOY plane than for the XOZ plane. The SLMed 316 L was expected to exhibit higher strength but lower ductility than the wrought 316 L, which was attributed to the high density of dislocations. The pitting potentials of the SLMed 316 L samples were universally higher than those of the wrought sample in chloride solutions because of the annihilation of MnS or(Ca,Al)-oxides during the rapid solidification. However, the molten pool boundaries preferentially dissolved in aggressive solutions and the damage of the SLMed 316 L in FeCl3 solution was more serious after long-term service, indicating poor durability. 展开更多
关键词 selective laser MELTING mechanical property corrosion resistance 316l stainless steel ANISOTROPY MOLTEN POOL boundary
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Enhanced mechanical properties and formability of 316L stainless steel materials 3D-printed using selective laser melting 被引量:7
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作者 Xiao-qin Yang Ying Liu +3 位作者 Jin-wen Ye Ren-quan Wang Ting-chuan Zhou Bin-yang Mao 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2019年第11期1396-1404,共9页
This study is conducted to develop an innovative and attractive selective laser melting(SLM)method to produce 316 L stainless steel materials with excellent mechanical performance and complex part shape.In this work,t... This study is conducted to develop an innovative and attractive selective laser melting(SLM)method to produce 316 L stainless steel materials with excellent mechanical performance and complex part shape.In this work,the subregional manufacturing strategy,which separates the special parts from the components using an optimized process,was proposed.The results showed that produced 316 L materials exhibited superior strength of^755 MPa and good ductility.In the as-built parts,austenite with preferred orientation of the(220)plane,δ-ferrite,and a small amount of CrO phases were present.In addition,the crystal size was fine,which contributed to the enhancement of the parts’mechanical properties.The structural anisotropy mechanism of the materials was also investigated for a group of half-sized samples with variable inclination directions.This technique was used to fabricate a set of impellers with helical bevels and high-precision planetary gears,demonstrating its strong potential for use in practical applications. 展开更多
关键词 316l stainless steel SELECTIVE laser MELTING FORMABILITY mechanical properties microstructure
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Processing and mechanical properties of porous 316L stainless steel for biomedical applications 被引量:14
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作者 Montasser M. DEWIDAR Khalil A. KHALIL J. K. LIM 《中国有色金属学会会刊:英文版》 EI CSCD 2007年第3期468-473,共6页
Highly porous 316L stainless steel parts were produced by using a powder metallurgy process, which includes the selective laser sintering(SLS) and traditional sintering. Porous 316L stainless steel suitable for medica... Highly porous 316L stainless steel parts were produced by using a powder metallurgy process, which includes the selective laser sintering(SLS) and traditional sintering. Porous 316L stainless steel suitable for medical applications was successfully fabricated in the porosity range of 40%-50% (volume fraction) by controlling the SLS parameters and sintering behaviour. The porosity of the sintered compacts was investigated as a function of the SLS parameters and the furnace cycle. Compressive stress and elastic modulus of the 316L stainless steel material were determined. The compressive strength was found to be ranging from 21 to 32 MPa and corresponding elastic modulus ranging from 26 to 43 GPa. The present parts are promising for biomedical applications since the optimal porosity of implant materials for ingrowths of new-bone tissues is in the range of 20%-59% (volume fraction) and mechanical properties are matching with human bone. 展开更多
关键词 不锈钢 激光烧结 处理方法 金属
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Bone-like apatite formation on HA/316L stainless steel composite surface in simulated body fluid 被引量:3
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作者 樊新 陈剑 +3 位作者 邹俭鹏 万千 周忠诚 阮建明 《中国有色金属学会会刊:英文版》 EI CSCD 2009年第2期347-352,共6页
HA/316L stainless steel(316L SS) biocomposites were prepared by hot-pressing technique. The formation of bone-like apatite on the biocomposite surfaces in simulated body fluid(SBF) was analyzed by digital pH meter,pla... HA/316L stainless steel(316L SS) biocomposites were prepared by hot-pressing technique. The formation of bone-like apatite on the biocomposite surfaces in simulated body fluid(SBF) was analyzed by digital pH meter,plasma emission spectrometer,scanning electron microscope(SEM) and energy dispersive X-ray energy spectrometer(EDX). The results indicate that the pH value in SBF varies slightly during the immersion. It is a dynamic process of dissolution-precipitation for the formation of apatite on the surface. With prolonging immersion time,Ca and P ion concentrations increase gradually,and then approach equilibrium. The bone-like apatite layer forms on the composites surface,which possesses benign bioactivity and favorable biocompatibility and achieves osseointegration,and can provide firm fixation between HA60/316L SS composite implants and human body bone. 展开更多
关键词 316l不锈钢 类骨磷灰石 模拟体液 复合材料 表面 HA 等离子发射光谱仪 扫描电子显微镜
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Influence of high-intensity pulsed ion beams irradiation on oxidation behavior of 316L stainless steel at 700℃ 被引量:2
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作者 王旭 王兰芳 +2 位作者 祝美丽 张俊善 雷明凯 《中国有色金属学会会刊:英文版》 CSCD 2006年第B02期676-680,共5页
316L stainless steel samples, as a widespread used material, were irradiated with HIPIB at the beam parameters of ion energy 300 keV, current density 100, 200 and 300 A/cm2, shot number 10 and pulse duration 75 ns. Th... 316L stainless steel samples, as a widespread used material, were irradiated with HIPIB at the beam parameters of ion energy 300 keV, current density 100, 200 and 300 A/cm2, shot number 10 and pulse duration 75 ns. The surface morphology and the phase structure in the near surface region of original and treated samples were analyzed with scanning electron microscopy (SEM) and X-ray diffractometry (XRD). It is shown that the HIPIB irradiation can smooth the surface of the samples, and the preferred orientation is present in the surface layer of irradiated coupons. The influence of HIPIB irradiation on the oxidation behavior of 316L stainless steel at 700℃for up to 100 h was investigated. Electron probe microanalysis (EPMA) was used to study the distribution of elements in the oxidation products. It is found that the oxidation behavior of the irradiated coupons depends greatly on the ion current density of HIPIB. HIPIB irradiation with ion current density of 100 A/cm2 slightly reduces the oxidation rate with respect to the unirradiated coupon. The improvement of the oxidation resistance can be attributed to more oxide of Cr that forms on the surface of the irradiated coupons. In contrast, HIPIB irradiation with ion current density of 200 or 300 A/cm2 is proved to be detrimental, causing a higher oxidation rate. 展开更多
关键词 316l不锈钢 高强度脉冲离子束 辐照 表面改性 高温氧化
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