Microstructure and mechanical properties of laser additive manufactured novel titanium alloy after heat treatment

作     者：Tian-yu Liu Hong-yu Liu Qian Yao Shi-bing Liu Kun Shi Zhi-yong Zhang Chong-yang Li Tian-yu Liu;Hong-yu Liu;Qian Yao;Shi-bing Liu;Kun Shi;Zhi-yong Zhang;Chong-yang Li

作者机构：Shenyang Research Institute of Foundry Co.Ltd.Shenyang 110022China State Key Laboratory of Light Alloy Casting Technology for High-end EquipmentShenyang 110022China 

出 版 物：《China Foundry》 (中国铸造（英文版）)

年 卷 期：2021年第18卷第6期

页      面：574-580页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：financially supported by the Shenyang Young and Middle-aged Scientific and Technological Innovation Talents Program(RC190490) the Liaoning Revitalization Talents Program(No.XLYC1808030) 

主　　题：laser additive manufacturing titanium alloy composition design heat treatment 

摘      要：A novel α+β titanium alloy with multi-alloying addition was designed based on the cluster formula 12[Al-Ti_(12)](AlTi_(2))+5[Al-Ti_(14)](AlV_(1.2)Mo_(0.6)Nb_(0.2))which was derived from *** nominal composition of this novel alloy was determined as *** this study,the novel alloy and Ti-6Al-4V alloy samples were prepared by laser additive *** microstructure,micro-hardness,room/high temperature tensile properties of the as-deposited samples were *** to Ti-6Al-4V,the novel alloy has much higher room and high temperature(600℃)tensile strengths,which are 1,427.5 MPa and 642.2 MPa,respectively;however,it has a much lower elongation(3.2%)at room temperature because of the finer *** improve the elongation of the novel alloy,heat treatment was *** solution at 960℃ or 970℃ for 1 h followed by air cooling and aging at 550℃ for 4 h followed by air cooling,a unique bi-modal microstructure which contains crab-like primaryαand residual β phase is obtained,improving the compression elongation by 80.9% compared to the as-deposited *** novel alloy can be used as a high-temperature and high-strength candidate for laser additive manufacturing.