文献类型：期刊文章

作　　者：钱婷婷[1] 刘栋[1] 田象军[1] 刘长猛[1] 王华明[1]

机构地区：[1]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,北京100191

出　　处：《Transactions of Nonferrous Metals Society of China》

基　　金：Project(2010CB731705)supported by the National Basic Research Program of China

年　　份：2014

卷　　号：24

期　　号：9

起止页码：2729-2736

语　　种：中文

收录情况：AJ、CAS、CSA、CSA-PROQEUST、CSCD、CSCD2013_2014、EBSCO、EI、IC、INSPEC、JST、SCI(收录号：WOS:000344001700001)、SCI-EXPANDED(收录号：WOS:000344001700001)、SCIE、SCOPUS、WOS、ZGKJHX、普通刊

摘　　要：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.

关 键 词：laser additive manufacturing  TA2/ TA15  graded structural material  MICROSTRUCTURE chemical composition  

分 类 号：TB33[材料类]