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激光增材制备Ti-6Al-4V/TiC金属陶瓷熔覆层组织与性能强化 被引量:1
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作者 范战争 任维彬 +1 位作者 方世源 王玉江 《材料工程》 EI CAS CSCD 北大核心 2024年第5期83-92,共10页
Ti-6Al-4V合金因具有良好的强度、塑性、韧性、耐蚀性以及可焊性,在航空航天以及化工装备制造领域具有广泛应用,但其硬度以及耐磨性不高等性能短板,一定程度上限制了其摩擦磨损工况下的服役寿命。本研究基于激光熔覆优化工艺方法,增材... Ti-6Al-4V合金因具有良好的强度、塑性、韧性、耐蚀性以及可焊性,在航空航天以及化工装备制造领域具有广泛应用,但其硬度以及耐磨性不高等性能短板,一定程度上限制了其摩擦磨损工况下的服役寿命。本研究基于激光熔覆优化工艺方法,增材制备具有TiC添加相的Ti-6Al-4V合金同质金属陶瓷熔覆层,表征并验证TiC增强相对熔覆层组织以及基本力学性能的强化作用。结果表明:熔覆层主要物相包括α-Ti,β-Ti以及TiC,其中TiC在熔覆层内过饱和析出,且受熔覆层不同位置过冷度差异影响,析出的TiC在熔覆层顶部以细小的颗粒状为主,而在熔覆层中部则主要呈树枝及花瓣状析出,熔覆层底部新增了麦穗状的析出形状,而稀释区则未见明显TiC析出。熔覆层平均显微硬度为530HV0.5,较基体提升了61%;在35 N载荷下,熔覆层平均摩擦因数为0.3583,较基体降低了11%,体积磨损率约为基材的87%,磨损形式为黏着磨损和磨粒磨损。 展开更多
关键词 激光熔覆 ti-6al-4v tic 熔覆层 组织与性能
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Assessment of Ti-6Al-4V particles as a reinforcement for AZ31 magnesium alloy-based composites to boost ductility incorporated through friction stir processing 被引量:8
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作者 Isaac Dinaharan Shuai Zhang +1 位作者 Gaoqiang Chen Qingyu Shi 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2022年第4期979-992,共14页
Poor ductility is the primary concern of magnesium matrix composites(MMCs)inflicted by non-deformable ceramic particle reinforcements.Metal particles which melt at elevated temperature can be used as reinforcement to ... Poor ductility is the primary concern of magnesium matrix composites(MMCs)inflicted by non-deformable ceramic particle reinforcements.Metal particles which melt at elevated temperature can be used as reinforcement to improve the deformation characteristics.Ti-6Al-4V particles reinforced AZ31 MMCs were produced through friction stir processing(FSP)which was carried out in a traditional vertical milling machine.The microstructural features as well as the response to external tensile load were explored.A homogenous distribution of Ti-6Al-4V was achieved at every part of the stir zone.There was no chemical decomposition of Ti-6Al-4V.Further,Ti-6Al-4V did not react with Al and Zn present in AZ31 alloy to form new compounds.A continuous strong interface was obtained around Ti-6Al-4V particle with the matrix.Ti-6Al-4V particles underwent breakage during processing due to severe plastic strain.There was a remarkable refinement of grains in the composite caused by dynamic recrystallization in addition to the pinning of smaller size broken particles.Dense dislocations were observed in the matrix because of plastic deformation and the associated strain misfit.Ti-6Al-4V particles improved the tensile behavior and assisted to obtain appreciable deformation before fracture.Brittle mode of failure was avoided. 展开更多
关键词 Magnesium matrix composite Friction stir processing ti-6al-4v Microstructure Tensile strength
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Microstructural aspects of in-situ TiB reinforced Ti-6Al-4V composite processed by spark plasma sintering 被引量:4
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作者 Saeid GHESMATI TABRIZI Abolfazl BABAKHANI +1 位作者 Seyed Abdolkarim SAJJADI 吕维洁 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2015年第5期1460-1467,共8页
Titanium-matrix composites have important and wide applications in the transport and aerospace industries. The current research was focused on powder metallurgy processing of in-situ reinforced titanium-matrix composi... Titanium-matrix composites have important and wide applications in the transport and aerospace industries. The current research was focused on powder metallurgy processing of in-situ reinforced titanium-matrix composite with Ti B whiskers. The Ti-6Al-4V alloy and B4 C additive powders were used as raw materials. Two different consolidation techniques, namely press-and-sintering and spark plasma sintering, were selected. It was observed that in-situ Ti B whiskers were formed during sintering in both methods. The changes in size, aspect ratio and distribution of in-situ whiskers in different composite samples were monitored. The effect of spark plasma sintering temperature on the synthesis of in-situ whiskers was also investigated. Based on the microstructural observations(optical microscopy and scanning electron microscopy) and the energy dispersive spectroscopy analysis, it was concluded that increasing the spark plasma sintering temperature from 900 to 1100 °C would lead to the complete formation of in-situ Ti B whiskers and reduced porosity content. 展开更多
关键词 ti-6al-4v metal matrix composite tib whisker in-situ reaction spark plasma sintering
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Preparation and Interfacial Stability of SiC_f/Ti-6Al-4V Composites Fabricated Using Powder Coated Fiber Method 被引量:1
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作者 Yanhua LI Dezhi ZHANG +1 位作者 Nanlin SHI Rui YANG 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2005年第6期903-908,共6页
SiCf/Ti-6Al-4V composites were fabricated by the powder-coated fiber method. The precursor fiber was prepared under the optimized parameter, and the composites were made using the vacuum hot pressure method. The influ... SiCf/Ti-6Al-4V composites were fabricated by the powder-coated fiber method. The precursor fiber was prepared under the optimized parameter, and the composites were made using the vacuum hot pressure method. The influence of heat exposure time on products of thelinterfacial reaction was investigated using scanning electron microscope (SEM) and analytical transmission electron microscope (TEM) with energy dispersive spectrometer (EDS). The main products are TiC and Ti5Si3 after vacuum exposing the samples at 700℃ for 50 h. The growth dynamics of interracial reaction products was analyzed quantitatively, which fitted the parabola rule. The activity energy of the reaction was 252 kJ·mol^-1. 展开更多
关键词 Powder coated fiber SiCf/ti-6al-4v composites Interfacial reaction KINEtic Activity energy
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TiB2涂层刀具制备及干铣削Ti-6Al-4V磨损行为研究? 被引量:3
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作者 刘杰 朱水生 +3 位作者 邓欣 刘建业 王忠平 屈志 《中国陶瓷》 CAS CSCD 北大核心 2020年第1期47-55,共9页
由于切削过程中产生高温、刀具粘结与氧化严重,钛合金切削尤其是干切削,一直是刀具行业的重大挑战之一,而在刀具表面添加涂层是提高钛合金切削刀具寿命的有效途径。利用脉冲磁控溅射技术制备了TiB2涂层刀具,以相同基体的无涂层刀具为对... 由于切削过程中产生高温、刀具粘结与氧化严重,钛合金切削尤其是干切削,一直是刀具行业的重大挑战之一,而在刀具表面添加涂层是提高钛合金切削刀具寿命的有效途径。利用脉冲磁控溅射技术制备了TiB2涂层刀具,以相同基体的无涂层刀具为对照,干铣削Ti-6Al-4V钛合金,切削速度从30~100 m/min变化,研究TiB2涂层刀具的切削性能与失效机理。所制备的TiB2涂层具有(100)择优取向的六方晶体结构,组织致密。涂层硬度可高达4000 HV。切削实验发现,在30 m/min的低速时,TiB2涂层刀具的切削寿命超过无涂层刀具57%之多,当切削速度加倍到60 m/min时,刀具寿命未见下降。当切削速度增加到100 m/min时,TiB2涂层刀具与无涂层刀具切削寿命相当。TiB2涂层刀具表面氧化所产生的B2O3液化膜,起自润滑作用,可充分减少钛合金的粘结,降低摩擦力。因此,在TiB2或B2O3消失之前,TiB2涂层刀具均有良好表现。在100 m/min时,切削高温造成B2O3强烈挥发,且TiB2被氧化为多孔疏松的TiO2,刀具寿命急剧下降到无涂层刀具的水平。 展开更多
关键词 tib2涂层 ti-6al-4v 刀具磨损 氧化行为 干铣削
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Ti-6Al-4V合金表面激光熔覆NiCrBSi+5%BN涂层组织和性能 被引量:3
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作者 韩文静 宋进朝 《中国涂料》 CAS 2011年第4期51-54,共4页
Ti-6Al-4V合金具有比强度高、耐蚀性能好等优点,在航天、航空、石油和化工等新科技工业部门广泛使用。在表面激光熔覆金属-陶瓷复合涂层是改善钛合金性能的重要方式,利用XRD、SEM和EDS等分析手段对NiCrBSi+5%(质量分数)BN熔覆层的微... Ti-6Al-4V合金具有比强度高、耐蚀性能好等优点,在航天、航空、石油和化工等新科技工业部门广泛使用。在表面激光熔覆金属-陶瓷复合涂层是改善钛合金性能的重要方式,利用XRD、SEM和EDS等分析手段对NiCrBSi+5%(质量分数)BN熔覆层的微观组织进行分析。利用HV-1000型显微维氏硬度计测试激光熔覆试样的硬度。 展开更多
关键词 ti-6al-4v合金 激光熔覆 TiN tib2 原位自生
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Effect of Powder Particle Size on the Fabrication of Ti-6Al-4V Using Direct Laser Metal Deposition from Elemental Powder Mixture
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作者 Xueyang Chen Lei Yan +3 位作者 Wei Li Zhiyuan Wang Frank Liou Joe Newkirk 《Journal of Mechanics Engineering and Automation》 2016年第7期348-355,共8页
Direct LMD (laser metal deposition) was used to fabricate thin-wall Ti-6Al-4V using the powder mixture of Ti-6 wt.%Al-4 wt.%V. SEM (scanning electron microscopy), OM (optical microscopy) and EDS (energy dispers... Direct LMD (laser metal deposition) was used to fabricate thin-wall Ti-6Al-4V using the powder mixture of Ti-6 wt.%Al-4 wt.%V. SEM (scanning electron microscopy), OM (optical microscopy) and EDS (energy dispersive spectroscopy) were employed to examine the chemical composition and microstructure of the as-deposited sections. Vickers hardness tests were then applied to characterize the mechanical properties of the deposit samples which were fabricated using pre-mixed elemental powders. The EDS line scans indicated that the chemical composition of the samples was homogenous across the deposit. After significant analysis, some differences were observed among two sets of deposit samples which varied in the particle size of the mixing Ti-6wt.%Al-4wt.%V powder. It could be found that the set with similar particle number for Ti, Al and V powder made composition much more stable and could easily get industry qualified Ti-6Al-4V components. 展开更多
关键词 Laser metal deposition ti-6al-4v elemental powder EDS composition distribution vickers hardness.
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Tailorable microstructure and mechanical properties of selective laser melted TiB/Ti-6Al-4V composite by heat treatment
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作者 Jinliang Zhang Bo Song +2 位作者 Chao Cai Lijun Zhang Yusheng Shi 《Advanced Powder Materials》 2022年第2期19-26,共8页
This paper systematically investigated the effect of solution and artificial aging heat treatments on the microstructural evolution and mechanical properties of TiB/Ti-6Al-4V composites in situ fabricated by selective... This paper systematically investigated the effect of solution and artificial aging heat treatments on the microstructural evolution and mechanical properties of TiB/Ti-6Al-4V composites in situ fabricated by selective laser melting.The results showed that the fully martensite microstructure with TiB clusters of the as-built samples was transformed into lamellarα+βmicrostructure with TiB strips after solution heat treatment.With increasing the temperature,theαlaths and TiB particles coarsened and theβvolume fraction increased.After aging heat treatment,βvolume fraction decreased and TiB had no obvious changes.A superior combination of the yield strength of(1146.8±28.2)MPa and even higher plasticity and ultimate compressive strength((1680.1±18.3)MPa)than the as-built ones was obtained by solution heat treatment at 1000℃+water quenching and aging at 600℃for 6 hþair cooling. 展开更多
关键词 tib/ti-6al-4v composite Selective laser melting Heat treatment Microstructure Mechanical properties
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Microstructure and Property of Al‑FeCoNiCrAl High Entropy Alloy Composite Coating on Ti‑6Al‑4V During Annealing Using MA Method 被引量:2
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作者 SU Ningning FENG Xiaomei +2 位作者 ZANG Jiajun SUN Jing LI Huan 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2020年第3期481-489,共9页
Al-FeCoNiCrAl high entropy alloy(HEA) composite coatings were prepared on Ti-6Al-4V via highenergy mechanical alloying(MA). The microstructures and phase composition of the coatings were studied. A continuous and dens... Al-FeCoNiCrAl high entropy alloy(HEA) composite coatings were prepared on Ti-6Al-4V via highenergy mechanical alloying(MA). The microstructures and phase composition of the coatings were studied. A continuous and dense coating could be fabricated at a ratio of 35%(weight fraction)Al-FeCoNiCrAl after 4 h milling.The results showed that the thickness of the composite coatings increased first and then decreased with the increase of milling time. And the hardness of coating increased with the increase of milling time. The phase changed during the annealing process. Part of the initial body-centered cubic(BCC)phase of the composite coatings changed into the L12 phase,(Ni,Co)3Al4 and σ phase after annealing above 550 ℃. Ordered BCC was found in the coatings after annealing above 750 ℃. Only BCC and ordered BCC appeared in coatings after annealing above 1 050 ℃. The hardness of the coatings after annealing at 550 ℃ and 750 ℃ was higher than before because of spinodal decomposition and high hardness σ phase. The hardness of the coatings after annealing at 1 050 ℃ decreased because residual stress released. 展开更多
关键词 high entropy alloys ti-6al-4v alloy mechanical alloying composite coating annealing process
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Hot Deformation Behaviors in Ti-6Al-4V/(TiB+TiC)Composites
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作者 Xuejian Lin Hongjun Huang +4 位作者 Fuyu Dong Yue Zhang Xiaoguang Yuan Bowen Zheng Xiaojiao Zuo 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2021年第12期1747-1757,共11页
Thermal compression testing was investigated using the Gleeble 3800 thermal simulator,and thermal deformation behavior of particle-reinforced titanium matrix composites(TMCs)was studied under deformation temperatures ... Thermal compression testing was investigated using the Gleeble 3800 thermal simulator,and thermal deformation behavior of particle-reinforced titanium matrix composites(TMCs)was studied under deformation temperatures of 750-900°C,strain rates of 0.001-1 s^(-1),and experimental deformation of 60%.According to obtained flow stress curves,the hot deformation characteristics were analyzed.Based on the Arrhenius hyperbolic sinusoidal model,the constitutive equation at high temperature was established.Based on the theory of dynamic material models,a hot processing map of TMCs at high temperature was established,and the peak region of power dissipation rate and the instability region in the hot processing map were both determined.At the same time,the corresponding microstructures in the peak power dissipation rate and rheological instability regions were observed.The results showed that flow stress decreased with increasing deformation temperature and increased with increasing strain rate.The thermal deformation activation energy of titanium matrix composites was 301.8 kJ/mol.The Ti-6Al-4V/(TiB+TiC)composites possessed only one instability zone under high-temperature compression at a strain of 0.5,with corresponding temperatures at 750-840°C and strain rates at 0.1-1 s^(-1).The optimal thermal deformation parameters included corresponding temperatures of 830-880°C and strain rates of 0.001-0.05 s^(-1).The microstructures corresponding to optimal hot working parameters in processing maps were more homogeneous than the microstructures in the instability zone,including the distribution uniformity of reinforcement and the degree of dynamic recrystallization,and no instability phenomena including abnormal grain growth,microcracks or intensive fracture of reinforcements were found,indicating that the hot processing map had a positive guiding effect on the option of desirable material thermal-working parameters. 展开更多
关键词 ti-6al-4v/(tic+tib)composites Hot deformation Flow stress behavior Processing map
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Microstructural Changes of T1-6A1-4V Matrix by the Incorporation of Continuous SiC Fibers
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作者 Yuechun FU Nanlin SHI Dezhi ZHANG Rui YANG 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2006年第4期452-454,共3页
In SiC(f)/Ti-6Al-4V composites, the microstructure of the matrix close to the fiber was different from that of the fiber-less material. Microstructure observations show that a layer of fine grains was located adjace... In SiC(f)/Ti-6Al-4V composites, the microstructure of the matrix close to the fiber was different from that of the fiber-less material. Microstructure observations show that a layer of fine grains was located adjacent to the fiber, and more dislocations and faults were found in this region. Higher recrystallization nucleation rate due to the undeformed SiC fiber and thermal residual stress induced during cooling from the fabrication temperature caused the microstructural changes of the matrix. Hardness measurement indicates that the matrix in the fiber neighborhood was strengthened, and the strengthening effect decreased with distance away from the fiber. 展开更多
关键词 Matrix strengthening ti-6al-4v powder SiC fiber Metal-matrix composites
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Ti合金插层厚度对反应连接TiB_2基陶瓷/Ti-6Al-4V梯度复合材料的影响
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作者 宋亚林 张龙 +1 位作者 潘传增 朱冰 《复合材料学报》 EI CAS CSCD 北大核心 2016年第8期1769-1776,共8页
将Ti合金插层引入(Ti+B_4C)反应原料和Ti合金底板之间,研究Ti合金插层厚度变化对超重力反应连接TiB2基陶瓷/Ti-6Al-4V梯度复合材料界面显微组织与力学性能的影响。热力学计算表明:合成反应的绝热温度远超Ti合金的熔点,可以保证不同厚度... 将Ti合金插层引入(Ti+B_4C)反应原料和Ti合金底板之间,研究Ti合金插层厚度变化对超重力反应连接TiB2基陶瓷/Ti-6Al-4V梯度复合材料界面显微组织与力学性能的影响。热力学计算表明:合成反应的绝热温度远超Ti合金的熔点,可以保证不同厚度的Ti合金插层全部熔化。XRD、FESEM及EDS分析结果表明:在陶瓷和Ti合金底板之间形成梯度界面区,且随着Ti合金插层厚度的增加,梯度界面区的厚度也不断增大。自陶瓷基体至Ti合金底板,TiB_2和TiC_(1-x)的体积分数不断减少,而TiB的体积分数先增加而后减少,最终形成以TiB_2、TiC_(1-x)及TiB陶瓷相尺寸和分布为特征的梯度复合结构。而梯度连接区的硬度分布趋势更加平缓,其剪切强度不断提升。 展开更多
关键词 tib2基陶瓷/ti-6al-4v梯度复合材料 反应连接 Ti合金插层 显微组织 维氏硬度 剪切强度
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基体组织对TiC/Ti-6Al-4V复合材料断裂韧性的影响 被引量:3
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作者 雷力明 黄光法 +1 位作者 王方秋 郭相龙 《金属热处理》 CAS CSCD 北大核心 2014年第9期100-103,共4页
采用原位自生的方法制备了TiC颗粒增强的TiC/Ti-6Al-4V复合材料。将锻造后的钛基复合材料在700℃、995℃以及1020℃进行热处理,获得具有不同基体微观组织的复合材料,研究基体微观组织对钛基复合材料拉伸性能以及断裂韧性的影响。结果表... 采用原位自生的方法制备了TiC颗粒增强的TiC/Ti-6Al-4V复合材料。将锻造后的钛基复合材料在700℃、995℃以及1020℃进行热处理,获得具有不同基体微观组织的复合材料,研究基体微观组织对钛基复合材料拉伸性能以及断裂韧性的影响。结果表明,初始α相的含量及其尺寸对TiC/Ti-6Al-4V复合材料的断裂韧性影响较大,初始α相体积分数为20%时,复合材料拉伸性能最好,抗拉强度和伸长率分别为1057.5 MPa、19.95%;同时具有优良的断裂韧性。 展开更多
关键词 tic/ti-6al-4v复合材料 基体组织 断裂韧性 热处理
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TiB_(2)含量对选区激光熔化TiB/Ti-6Al-4V复合材料组织及力学性能的影响 被引量:10
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作者 钦兰云 门继华 +3 位作者 赵朔 杨光 王伟 王向明 《中国激光》 EI CAS CSCD 北大核心 2021年第6期49-58,共10页
以球磨TiB_(2)和Ti-6Al-4V混合粉末为原料,采用选区激光熔化(SLM)技术制备了增强相为TiB的钛基复合材料,分析了B元素含量对SLM成形钛基复合材料显微组织和力学性能的影响。研究结果表明:在SLM过程中,TiB_(2)与Ti元素发生反应生成针状Ti... 以球磨TiB_(2)和Ti-6Al-4V混合粉末为原料,采用选区激光熔化(SLM)技术制备了增强相为TiB的钛基复合材料,分析了B元素含量对SLM成形钛基复合材料显微组织和力学性能的影响。研究结果表明:在SLM过程中,TiB_(2)与Ti元素发生反应生成针状TiB增强相,B元素含量较高的试样中出现了针状增强相聚集的现象;由于B元素的存在,钛基复合材料中的α相明显细化;相比于传统的Ti-6Al-4V合金,TiB/Ti-6Al-4V复合材料的显微硬度、抗拉强度以及屈服强度均有明显改善。钛基复合材料优异的力学性能归因于TiB增强相的硬化、强化效应以及基体的晶粒细化。当B元素的质量分数为0.5%时,α片层的平均尺寸为0.49μm,钛基复合材料的抗拉强度和屈服强度相比于Ti-6Al-4V分别提高了25.7%和30.8%,抗拉强度为1396.4 MPa,屈服强度为1322.2 MPa。 展开更多
关键词 激光技术 选区激光熔化技术 tib/ti-6al-4v复合材料 显微组织 力学性能
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In situ selective laser gas nitriding for composite TiN/Ti-6Al-4V fabrication via laser powder bed fusion 被引量:2
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作者 P.A.Morton H.C.Taylor +3 位作者 L.E.Murr O.G.Delgado C.A.Terrazas R.B.Wicker 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2020年第10期98-107,共10页
Laser-assisted gas nitriding of selective Ti-6Al-4V surfaces has been achieved during laser powder bed fusion fabrication by exchanging the argon build gas environment with nitrogen.Systematic variation of processing ... Laser-assisted gas nitriding of selective Ti-6Al-4V surfaces has been achieved during laser powder bed fusion fabrication by exchanging the argon build gas environment with nitrogen.Systematic variation of processing parameters allowed microdendritic Ti N surface coatings to be formed having thicknesses ranging from a few tens of microns to several hundred microns,with TiN dendrite microstructure volume fractions ranging from 0.6 to 0.75;and corresponding Vickers microindentation hardness values ranging from^7.5 GPa–9.5 GPa.Embedded TiN hard layers ranging from 50μm to 150μm thick were also fabricated in the laser-beam additively manufactured Ti-6Al-4V alloy producing prototype,hybrid,planar composites having alternating,ductile Ti-6Al-4V layers with a hardness of^4.5 GPa and a stiff,TiN layer with a hardness of^8.5 GPa.The results demonstrate prospects for fabricating novel,additively manufactured components having selective,hard,wear and corrosion resistant coatings along with periodic,planar or complex metal matrix composite regimes exhibiting superior toughness and related mechanical properties. 展开更多
关键词 ti-6al-4v TiN ceramic coatings and embedded layers Dendritic microstructures Selective laser melting Additive manufacturing Metal matrix composites Selective nitriding
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