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MD Simulation of Diffusion Behaviors in Collision Welding Processes of Al-Cu, Al-Al, Cu-Cu
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作者 Dingyi Jin Guo Wei 《Computers, Materials & Continua》 SCIE EI 2024年第6期3455-3468,共14页
To investigate the effects of material combinations and velocity conditions on atomic diffusion behavior near collision interfaces,this study simulates the atomic diffusion behavior near collision interfaces in Cu-Al,... To investigate the effects of material combinations and velocity conditions on atomic diffusion behavior near collision interfaces,this study simulates the atomic diffusion behavior near collision interfaces in Cu-Al,Al-Al and Cu-Cu combinations fabricated through collision welding using molecular dynamic(MD)simulation.The atomic diffusion behaviors are compared between similar metal combinations(Al-Al,Cu-Cu)and dissimilar metal combinations(Al-Cu).By combining the simulation results and classical diffusion theory,the diffusion coefficients for similar and dissimilar metal material combinations under different velocity conditions are obtained.The effects of material combinations and collision velocity on diffusion behaviors are also discussed.The diffusion behaviors of dissimilar material combinations strongly depend on the transverse velocity,whereas those of the similar material combinations are more dependent on the longitudinal velocity.These findings can provide guidance for optimizing welding parameters. 展开更多
关键词 Atomic diffusion behavior molecular dynamics collision welding
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Friction heat production and atom diffusion behaviors during Mg-Ti rotating friction welding process 被引量:5
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作者 李瑞迪 李京龙 +3 位作者 熊江涛 张赋升 赵科 籍成宗 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第11期2665-2671,共7页
An innovative physical simulation apparatus, including high speed camera, red thermal imaging system, and mechanical quantity sensor, was used to investigate the friction heat generation and atom diffusion behavior du... An innovative physical simulation apparatus, including high speed camera, red thermal imaging system, and mechanical quantity sensor, was used to investigate the friction heat generation and atom diffusion behavior during Mg-Ti friction welding process. The results show that the friction coefficient mainly experiences two steady stages. The first steady stage corresponds to the Coulomb friction with material abrasion. The second steady stage corresponds to the stick friction with fully plastic flow. Moreover, the increasing rates of axial displacement, temperature and friction coefficient are obviously enhanced with the increase of rotation speed and axial pressure. It can also be found that the there exists rapid diffusion phenomenon in the Mg-Ti friction welding system. The large deformation activated diffusion coefficient is about 105 higher than that activated by thermal. 展开更多
关键词 Mg-Ti friction welding rotating friction welding heat generation atom diffusion friction coefficient Coulombfriction stick friction
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Effect of welding temperature and duration on properties of 7075 Al to AZ31B Mg diffusion bonded joint 被引量:15
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作者 Abdolhamid AZIZI Hossein ALIMARDAN 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2016年第1期85-92,共8页
7075 Al alloy and AZ31B Mg alloy were joined by diffusion welding technique at pressure 29 MPa with various welding temperatures and durations. Scanning electron microscopy examination, shear tests and microhardness e... 7075 Al alloy and AZ31B Mg alloy were joined by diffusion welding technique at pressure 29 MPa with various welding temperatures and durations. Scanning electron microscopy examination, shear tests and microhardness evaluation were conducted on the samples interface to find out the effect of welding temperatures and durations on the weldability. The results demonstrate that the AZ31B Mg/7075 Al composite plates are bonded well and the intermetallic phases such as Al_(12)Mg_(17) and Al_(3)Mg_(2) within the joint zone form. It is found that due to the grain coarsening and the formation of brittle compounds, high welding temperatures and long welding durations result in a decrease of shear strength and increase of interfacial welding hardness. The minimum shear strength of 15 MPa along with the maximum microhardness of HV 176 are obtained for the diffusion couple processed at 450 °C for 120 min. It is revealed that enhancing the temperature and choosing appropriate holding time makes a remarkable increase of interfacial welding thickness. Increasing the welding temperature from 430 to 450 °C along with long welding duration(120 min) results in the increase of interfacial welding thickness by 26% where this value is 6% at the welding performed for 60 min. 展开更多
关键词 Al alloy Mg alloy diffusion welding welding temperature welding duration
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3-D FINITE ELEMENT ANALYSIS OF THE EFFECT OF WELDING RESIDUAL STRESS ON HYDROGEN DIFFUSION IN HYDROGEN CONTAINED ENVIRONMENT 被引量:5
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作者 W.C. Jiang J.M. Gong J.Q. Tang H. Chen S.T. Tu 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2007年第5期347-354,共8页
The hydrogen distribution of 16MnR steel weldment in hydrogen contained environment was calculated using the finite element method ( FEM). The effect of welding residual stress on hydrogen diffusion has been discuss... The hydrogen distribution of 16MnR steel weldment in hydrogen contained environment was calculated using the finite element method ( FEM). The effect of welding residual stress on hydrogen diffusion has been discussed using a 3-D sequential coupling finite element analysis procedure complied by Abaqus code. The hydrogen diffusion coefficient in weld metal, the heat affected zone (HAZ), and the base metal of the 16MnR steel weldment were measured using the electrochemical permeation technique. The hydrogen diffusion without the effect of stress was also calculated and compared. Owing to the existence of welding residual stress, the hydrogen concentration was obviously increased and the hydrogen wouM diffuse and accumulate in the higher stress region. 展开更多
关键词 16MnR steel hydrogen diffusion welding residual stress finite element analysis
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Changing Rule of Carbon-Enriched Zone and Diffusion Behavior of Carbon in Aging 0Cr6Mn13Ni10MoTi/1Cr5Mo Dissimilar Welded Joints 被引量:3
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作者 Zheng LIU Ligang WANG Lai WANG Department of Materials Engineering, Dalian University of Technology, Dalian 116024,China 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2004年第3期307-310,共4页
The microstructures, the changing rule of carbon-enriched zone, the diffusion behaviors of elements C and Cr, and thecarbide type of 0Cr6Mn13Ni10MoTi/1Cr5Mo dissimilar welded joints after aging at 500℃ for various ti... The microstructures, the changing rule of carbon-enriched zone, the diffusion behaviors of elements C and Cr, and thecarbide type of 0Cr6Mn13Ni10MoTi/1Cr5Mo dissimilar welded joints after aging at 500℃ for various times and afterlong-term service in technical practice were investigated by using the optical microscopy electron probe microanalysis,scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The results show that in aging0Cr6Mn13Ni10MoTi/1Cr5Mo dissimilar welded joints, the main carbides are M_3C and a few carbides are M_7C_3 andM_(23)C_6. The M_3C carbide decomposition and dissolution with increasing aging time or aging temperature and theanti-diffusion of C and Cr cause the decrease and disappearance of the carbon-enriched zone. The results are differentfrom those of the A302/1Cr5Mo dissimilar welded joints in previous studies. 展开更多
关键词 Dissimilar welded joint AGING diffusion Carbides
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Predicting effects of diffusion welding parameters on welded joint properties by artificial neural network 被引量:3
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作者 刘黎明 祝美丽 +1 位作者 牛济泰 张忠典 《中国有色金属学会会刊:英文版》 CSCD 2001年第4期475-478,共4页
The static model for metal matrix composites in diffusion welding was established by means of artificial neural network method. The model presents the relationship between weld joint properties and welding parameters ... The static model for metal matrix composites in diffusion welding was established by means of artificial neural network method. The model presents the relationship between weld joint properties and welding parameters such as welding temperature, welding pressure and welding time. Through simulating the diffusion welding process of SiC w/6061Al composite, the effects of welding parameters on the strength of welded joint was studied and optimal technical parameters was obtained. It is proved that this method has good fault tolerant ability and versatility and can overcome the shortage of the general experiment. The established static model is in good agreement with the actual welding process, so it becomes a new path for studying the weldability of new material. 展开更多
关键词 artificial neural network diffusion welding COMPOSITE
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STUDY ON DIFFUSION WELDING OF ALUMINIUN MATRIX COMPOSITE 被引量:4
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作者 J. T. Niu L. M. Liu +2 位作者 J. P. Zhai J. Yu X. M. Zhang (National Key Laboratory of Advanced Welding Production Technology, HIT, Harbin 750001, China) 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2000年第1期12-17,共6页
Effects of diffusion welding parameters on strength of welded joint based on particle reinforced alumini- um matrix composite Al2O3p/6061Al were studied by comparing with aluminium matrix alloy,Mecha- nism for ... Effects of diffusion welding parameters on strength of welded joint based on particle reinforced alumini- um matrix composite Al2O3p/6061Al were studied by comparing with aluminium matrix alloy,Mecha- nism for the loss of joint strength was analyzed.It was pointed out that the key processing parameters affecting the strength of joint was the welding temperature.The high quality joint can be successfully obtained with appropriate diffusion welding parameters. 展开更多
关键词 particle reinforced aluminium matrix composite diffusion welding oxide film
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Effect of Welding Paramenter on Joint Property of Aluminum Matrix Composite in Liquid-Phase-Impacting Diffusion Welding 被引量:2
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作者 Wei GUO Qingchang MENG Jitai NIU Xinmei ZHANG 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2003年第z1期195-198,共4页
In this paper, a new method for welding SiCp/101A was put forward. It is LPI (liquid-phase-impacting) diffusionwelding. Through LPI diffusion welding SiCp/101A aluminum, the effect of welding parameters on the weldedj... In this paper, a new method for welding SiCp/101A was put forward. It is LPI (liquid-phase-impacting) diffusionwelding. Through LPI diffusion welding SiCp/101A aluminum, the effect of welding parameters on the weldedjoint property was investigated, and the optimal welding parameters were brought forward at the same time. Themicrostructure of joint was analyzed by means of optical-microscope, scanning electron microscope in order to studythe relationship between the macro-properties of joint and the microstructure. The results show that LPI diffusionwelding could be used for welding aluminum matrix composites SiCp/101A successfully. 展开更多
关键词 ALUMINUM matrix composite Liquid-phase-impacting diffusion welding SiCp/101A
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Atomic diffusion across Ni_(50)Ti_(50)Cu explosive welding interface:Diffusion layer thickness and atomic concentration distribution 被引量:1
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作者 陈仕洋 武振伟 刘凯欣 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第6期446-451,共6页
Molecular dynamics simulations are carried out to study atomic diffusion in the explosive welding process of NisoTis0-Cu (at.%). By using a hybrid method which combines molecular dynamics simulation and classical di... Molecular dynamics simulations are carried out to study atomic diffusion in the explosive welding process of NisoTis0-Cu (at.%). By using a hybrid method which combines molecular dynamics simulation and classical diffusion the- ory, the thickness of the diffusion layer and the atomic concentration distribution across the welding interface are obtained. The results indicate that the concentration distribution curves at different times have a geometric similarity. According to the geometric similarity, the atomic concentration distribution at any time in explosive welding can be calculated. NisoTis0- Cu explosive welding and scanning electron microscope experiments are done to verify the results. The simulation results and the experimental results are in good agreement. 展开更多
关键词 diffusion INTERFACES explosive welding molecular dynamics
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Diffusion welding of SiCp/2014Al composites using Ni as interlayer 被引量:1
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作者 Tao Feng Xizhang Chen +1 位作者 Luhai Wu Songnian Lou 《Journal of University of Science and Technology Beijing》 CSCD 2006年第3期267-271,共5页
SiCp/2014Al composites were bonded with the vacuum diffusion welding technique using Ni as the interlayer metal. Ni and Al were interdiffused and there were intermetallic compounds formed in the inter transition layer... SiCp/2014Al composites were bonded with the vacuum diffusion welding technique using Ni as the interlayer metal. Ni and Al were interdiffused and there were intermetallic compounds formed in the inter transition layer, which was composed of Ni3Al//NiAl//NiAl3. The relation between the diffusion distance and the element concentration was calculated according to Fick's second law. The relations of the diffusion concentration and the diffusion welding technique parameters were calculated. 展开更多
关键词 aluminum matrix composite diffusion bonding interface diffusion vacuum diffusion welding
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AGE STRENGTHENING OF DIFFUSION WELDED JOINT OF Al_2O_(3p)/6061Al COMPOSITE 被引量:1
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作者 J. T. Niu Y. H. Tian +2 位作者 B. Y. Li J. J. Xu L.M. Liu (National Key Laboratory of Advanced welding Production Technology, HIT, Harbin 150001, China) 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2000年第1期18-22,共5页
Tensile strength of diffusion welded joint of aluminum matrix composite is very low due to its poor weld- ability.In this paper, solution and age treatments were conducted on the welded joint of Al2O3p/ 6061Al compo... Tensile strength of diffusion welded joint of aluminum matrix composite is very low due to its poor weld- ability.In this paper, solution and age treatments were conducted on the welded joint of Al2O3p/ 6061Al composite subjected to diffusion welding using Gleeble 1500 machine, and ensile strength and microstructure of welded joint aged at175℃ were measured and analyzed respectively, Results showed that aging precipitation of welded joint is promoted effectively because of redistribution of reinforcement and a few number of dislocations in the matrix of weld zone resulting from welding pressure,and hence tensile strength of welded joint is increased significantly after aging treatment. 展开更多
关键词 aluminum matrix composite diffusion welding AGING
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EFFECTS OF DIFFUSION WELDING PARAMETERS ON JOINT STRENGTH OF SiCw/6061AI COMPOSITE 被引量:1
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作者 L.M. Liu J.T. Niu +1 位作者 Z.H. Lai Y.L. Guo and J.P. Zhai (National Key Laboratory of Advanced Welding Production Technologyt HIT, Harbin 150001, China) 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2000年第1期201-204,共4页
Diffusion welding was used to join SiCw/6061AI composites. The effects of welding pammeters on strength Of welded joint were investigated. JOint Of high quality for SiCw/6061Al composites can be obtained with aPPropri... Diffusion welding was used to join SiCw/6061AI composites. The effects of welding pammeters on strength Of welded joint were investigated. JOint Of high quality for SiCw/6061Al composites can be obtained with aPPropriate diffesion welding parameters. 展开更多
关键词 diffusion welding SiCw/6061AI composite
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Liquid-Phase-Impacting Diffusion Welding Mechanism and Microstructure of Welded Joint of Al Matrix Composite SiCp/101A 被引量:1
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作者 Jitai NIU Wei GUO Qingchang MENG Xinmei ZHANG Xingqiu LIU Guangtao ZHOU 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2003年第z1期179-181,共3页
The liquid-phase-impacting (LPI) diffusion welding mechanism and microstructure of welded joint of aluminum matrixcomposite SiCp/101A have been studied. It shows that by LPl diffusion welding, the interface state betw... The liquid-phase-impacting (LPI) diffusion welding mechanism and microstructure of welded joint of aluminum matrixcomposite SiCp/101A have been studied. It shows that by LPl diffusion welding, the interface state between SiCparticle and matrix is prominent, the harmful microstructure or brittle phase can be restrained from the welded joint.Moreover, the density of dislocation in the matrix near the interface and in the matrix are all so higher than that ofparent composite, the dislocation entwists each other intensively resulted in welding the composite successfully. 展开更多
关键词 ALUMINUM MATRIX composite Liquid-phase-impacting diffusion welding SiCp/101A
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Si diffusion behavior during laser welding-brazing of Al alloy and Ti alloy with Al-12Si filler wire 被引量:9
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作者 陈树海 李俐群 +1 位作者 陈彦宾 刘德健 《中国有色金属学会会刊:英文版》 EI CSCD 2010年第1期64-70,共7页
In laser welding-brazing of Al alloy (5A06) and Ti alloy (Ti-6Al-4V) with rectangular CO2 laser spot and with Al-12Si filler wire, element Si enriches at the interface between Ti substrate and the filler metal. It is ... In laser welding-brazing of Al alloy (5A06) and Ti alloy (Ti-6Al-4V) with rectangular CO2 laser spot and with Al-12Si filler wire, element Si enriches at the interface between Ti substrate and the filler metal. It is found that the Si diffusion behavior has a significant effect on the formation of interfacial intermetallic compounds. To analyze the Si diffusion behavior, a model for the prediction of the chemical potential for ternary alloy was established. According to the calculated results of the influence of the element content and temperature in Ti-Al-Si system on Si chemical potential, the diffusion behavior of Si element was analyzed for Ti dissolution and melting mode, which presents a good agreement with the experimental data. Further, formation mechanism of the interfacial intermetllic compound was clarified. 展开更多
关键词 钛铝合金 扩散行为 激光焊接 硅元素 金属间化合物 料线 金属界面 预测模型
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Microstructure in the Weld Metal of Austenitic-Pearlitic Dissimilar Steels and Diffusion of Element in the Fusion Zone 被引量:6
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作者 Yajiang LI, Zengda ZOU and Bing ZHOU Department of Materials Engineering, Shandong University, Jinan 250061, China E-mail: yajli@jn-public.sd.cninfo.net 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2001年第3期338-342,共5页
Microstructure and alloy element distribution in the welded joint between austenitic stainless steel (1Cr18Ni9Ti) and pearlitic heat-resistant steel (1Cr5Mo) were researched by means of light microscopy, scanning elec... Microstructure and alloy element distribution in the welded joint between austenitic stainless steel (1Cr18Ni9Ti) and pearlitic heat-resistant steel (1Cr5Mo) were researched by means of light microscopy, scanning electron microscopy (SEM) and electron probe microanalysis (EPMA). Microstructure, divisions of the fusion zone and elemental diffusion distributions in the welded joints were investigated. Furthermore, solidification microstructure and S-ferrite distribution in the weld metal of these steels are also discussed. 展开更多
关键词 Microstructure in the weld Metal of Austenitic-Pearlitic Dissimilar Steels and diffusion of Element in the Fusion Zone
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DIFFUSION WELDING FOR 6061 Al REINFORCED WITH SiCw WHISKER
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作者 Niu, JT Liu, LM Han, LH 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 1999年第1期1-5,共5页
The weldability of SiCw/6061Al -was investigated. From the results of experiments, it is found that the strength of joint is mainly influenced by welding temperature, and high strength of joint is obtained under meldi... The weldability of SiCw/6061Al -was investigated. From the results of experiments, it is found that the strength of joint is mainly influenced by welding temperature, and high strength of joint is obtained under melding temperature between liquidus and solidus of matrix alloy. Diffusion welding of SiCw/6061Al was successfully realized with appropriate ivelding parameters. 展开更多
关键词 SiCw/6061Al composite diffusion welding welding temperature
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Study on diffusion welding SiCp/ZL101 with Cu interlayer
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作者 NIU Jitai, GUO Wei, ZHANG Xinmei, and LIU Xingqiu1) State Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin 150001, China2) State Key Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, Shanghai 200030, China 《Rare Metals》 SCIE EI CAS CSCD 2003年第4期289-293,共5页
Through the vacuum diffusion welding SiCp/ZL 101 aluminum with Cu interlayer,the effect of welding parameter and the thickness of Cu on the welded joint property wasinvestigated, and the optimal welding parameters wer... Through the vacuum diffusion welding SiCp/ZL 101 aluminum with Cu interlayer,the effect of welding parameter and the thickness of Cu on the welded joint property wasinvestigated, and the optimal welding parameters were put forward at the same time. Themicrostructure of joint was analyzed by means of optical-microscope, scanning electron microscope inorder to study the relationship between the macro-properties of joint and the microstructure. Theresults show that diffusion welding with Cu interlayer could be used for welding aluminum matrixcomposites SiCp/ZL 101 successfully. 展开更多
关键词 aluminum matrix composite SiCp/ZL 101 diffusion welding Cu interlayer
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MECHANICAL PROPERTIES OF Si_3N_4/METAL DIFFUSION WELDING TIP
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作者 Xiong Baiqing Beijing General Research Institute for Non ferrous Metals, Beijing 100088 Zhi Rentao, Xiao Jimei University of Science and Technology Beijing, Beijing 100083 《中国有色金属学会会刊:英文版》 CSCD 1997年第4期39-43,共5页
MECHANICALPROPERTIESOFSi3N4/METALDIFFUSIONWELDINGTIP①XiongBaiqingBeijingGeneralResearchInstituteforNonferro... MECHANICALPROPERTIESOFSi3N4/METALDIFFUSIONWELDINGTIP①XiongBaiqingBeijingGeneralResearchInstituteforNonferrousMetals,Beijing1... 展开更多
关键词 MECHANICAL property diffusion weldING SI 3N 4/metal thermal residual stress
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Study on Diffusion Welding Parameters of Particle reinforced Aluminium Matrix Composite Al_2O_(3p) /6061Al
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作者 刘黎明 牛济泰 韩立红 《Rare Metals》 SCIE EI CAS CSCD 1999年第4期299-304,共6页
Effects of diffusion welding process parameters on strength of welded joint based on particle reinforced aluminium matrix composite Al 2O 3p /6061Al have been studied through comparing with aluminium matrix allo... Effects of diffusion welding process parameters on strength of welded joint based on particle reinforced aluminium matrix composite Al 2O 3p /6061Al have been studied through comparing with aluminium matrix alloy. The mechanism for loss of joint strength has been analyzed. It should be pointed out that key processing parameters affecting the strength of joint was welding temperature. The high quality joint can be successfully obtained with appropriate diffusion welding parameters. 展开更多
关键词 Particle reinforced aluminium matrix composite diffusion welding Oxide film
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Diffusion welding SiC_p/ZL101 with Ni interlayer
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作者 JitaiNiu WeiGuo QingchangMeng BaoyouZhang 《Journal of University of Science and Technology Beijing》 CSCD 2004年第1期85-89,共5页
Through the vacuum diffusion welding SiC_p/ZL101 aluminum with Ni interlayer,the effect of welding parameter and the thickness property of Ni on the welded joint wasinvestigated, and the optimal welding parameters wer... Through the vacuum diffusion welding SiC_p/ZL101 aluminum with Ni interlayer,the effect of welding parameter and the thickness property of Ni on the welded joint wasinvestigated, and the optimal welding parameters were put forward at the same time. Themicrostructure of joint was analyzed by means of optical-microscope, scanning electron microscope(SEM) in order to study the relationship between the macro-properties of joint and themicrostructure. The results show that diffusion welding with Ni interlayer can be used for weldingaluminum matrix composites SiC_p/ZL101 successfully. Under the welding parameters T=560℃, P=5 MPa,t=60 min, H=14μm, the bonding strength of welded joint can up to 121 MPa. Moreover, the thicknessof interlayer should match with the size of reinforced particles. If the thickness of interlayer istoo thin, it would have no effect on the welded joint beneficially. If the thickness of interlayeris too thick, it would cause the 'no-reinforcement zone' to appear. 展开更多
关键词 aluminum matrix composite diffusion welding SiC_p/ZL101 Ni interlayer
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