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激光增材制造TA2/TA15梯度结构材料的显微组织(英文)
引用本文:钱婷婷,刘栋,田象军,刘长猛,王华明. 激光增材制造TA2/TA15梯度结构材料的显微组织(英文)[J]. 中国有色金属学会会刊, 2014, 24(9): 2729-2736. DOI: 10.1016/S1003-6326(14)63404-X
作者姓名:钱婷婷  刘栋  田象军  刘长猛  王华明
作者单位:北京航空航天大学材料科学与工程学院;大型整体金属构件激光直接制造教育部工程研究中心;
基金项目:Project(2010CB731705)supported by the National Basic Research Program of China
摘    要:利用激光增材制造技术制备TA2/TA15梯度结构材料,研究该梯度结构材料的化学成分、显微组织和显微硬度的变化。结果表明:TA2部分宏观组织为近等轴晶组织,显微组织为魏氏α片层组织。TA15部分宏观组织是粗大的柱状晶,显微组织是细小的网篮组织。过渡区的厚度为3000μm,分成4层。随着距离TA2部分距离的增加,合金元素和β相含量逐渐增加,α相含量逐渐减少,显微组织从魏氏α片层向网篮α片层逐渐演化。固溶强化和相界面强化使得显微组织从TA2部分到TA15部分逐渐增加。

关 键 词:激光增材制造  TA2/TA15  梯度结构材料  显微组织  化学成分
收稿时间:2013-09-03

Microstructure of TA2/TA15 graded structural material by laser additive manufacturing process
Ting-ting QIAN,Dong LIU,Xiang-jun TIAN,Chang-meng LIU,Hua-ming WANG. Microstructure of TA2/TA15 graded structural material by laser additive manufacturing process[J]. Transactions of Nonferrous Metals Society of China, 2014, 24(9): 2729-2736. DOI: 10.1016/S1003-6326(14)63404-X
Authors:Ting-ting QIAN  Dong LIU  Xiang-jun TIAN  Chang-meng LIU  Hua-ming WANG
Affiliation:( Engineering Research Center of Ministry of Education on Laser Direct Manufacturing for Large Metallic Components, School of Materials Science and Engineering, Beihang University, Beijing 100191, China)
Abstract:TA2/TA15 graded structural material(GSM) was fabricated by the laser additive manufacturing(LAM) process. The chemical composition, microstructure and micro-hardness of the as-deposited GSM were investigated. The results show that the TA2 part of exhibiting near-equiaxed grains was Widmanst?tten α-laths microstructure. The TA15 part containing large columnar grains was fine basket-weave microstructure. The graded zone was divided into four deposited layers with 3000 μm in thickness. As the distance from the TA2 part increases, the alloy element contents and the β phase volume fraction increase, the α phase volume fraction decreases and the microstructure shows the evolution from Widmanst?tten α-laths to basket-weave α-laths gradually. The micro-hardness increases from the TA2 part to the TA15 part due to the solid solution strengthening and grain boundary strengthening.
Keywords:laser additive manufacturing  TA2/ TA15  graded structural material  microstructure  chemical composition
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