Microstructures and mechanical properties of Ti−Al−V−Nb alloys with cluster formula manufactured by laser additive manufacturing

作     者：Tian-yu LIU Xiao-hua MIN Shuang ZHANG Cun-shan WANG Chuang DONG 刘田雨;闵小华;张爽;王存山;董闯

作者机构：School of Materials Science and EngineeringDalian University of TechnologyDalian 116024China Key Laboratory for Materials Modification by LaserIonand Electron Beams(Dalian University of Technology)Ministry of EducationDalian 116024China School of Materials Science and EngineeringDalian Jiaotong UniversityDalian 116028China 

基　　金：the National Key Research and Development Program of China(No.2016YFB1100103) 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2021年第31卷第10期

页      码：3012-3023页

摘      要：Ti−Al−V−Nb alloys with the cluster formula,12[Al−Ti_(12)](AlTi_(2))+5[Al−Ti1_(4)](V,Nb)2Ti,were designed by replacing V with Nb based on the Ti−6Al−4V ***-track cladding layers and bulk samples of the alloys with Nb contents ranging from 0 to 6.96 wt.%were prepared by laser additive manufacturing to examine their formability,microstructure,and mechanical *** single-track cladding layers,the addition of Nb increased the surface roughness slightly and decreased the molten pool height to improve its *** alloy,Ti−5.96Al−1.94V−3.54Nb(wt.%),exhibited better geometrical accuracy than the other alloys because its molten pool height was consistent with the spread layer thickness of the *** microstructures of the bulk samples contained similar columnar β-phase grains,regardless of Nb *** grains grew epitaxially from the Ti substrate along the deposition direction,with basket-weaveα-phase laths within the columnar ***α-phase size increased with increasing Nb contents,but its uniformity *** the deposition direction,the Vickers hardness increased from the substrate to the *** Ti−5.96Al−1.94V−3.54Nb alloy exhibited the highest Vickers hardness regardless of deposition position because of the optimal matching relationship between theα-phase size and its content among the designed alloys.

主 题 词：Ti−Al−V−Nb alloy composition design laser additive manufacturing microstructure mechanical properties 

学科分类：08[工学] 080502[080502] 0805[工学-能源动力学] 

核心收录：

D　O　I：10.1016/S1003-6326(21)65711-4

馆 藏 号：203105868...