High-throughput determination of mechanical and diffusion properties of Ti–Ta–Fe alloys  

Ti-Ta-Fe合金力学和扩散性能的高通量测定

作　　者：Hao-qin LIN Jin-feng LING Wei-min CHEN Yao WANG Xiao-ke WU Li-jun ZHANG 林浩钦;零锦凤;陈伟民;王瑶;吴晓科;张利军(暨南大学先进耐磨蚀及功能材料研究院,广州510632;东莞材料基因高等理工研究院,东莞523808;中南大学粉末冶金国家重点实验室,长沙410083)

机构地区：[1]Institute of Advanced Wear&Corrosion Resistant and Functional Materials,Jinan University,Guangzhou 510632,China [2]Centre of Excellence for Advanced Materials,Dongguan 523808,China [3]State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China

出　　处：《Transactions of Nonferrous Metals Society of China》2022年第12期3963-3972,共10页中国有色金属学报（英文版）

基　　金：financially supported by the National Natural Science Foundation for Youth of China (No. 51701083);the Guangzhou Science and Technology Association Young Talent Lifting Project, China (No. X20210201054);the Open Fund of National Joint Engineering Research Center for Abrasion Control and Molding of Metal Materials, China (No. HKDNM201903);the Guangdong Basic and Applied Basic Research Foundation, China (No. 2019A1515110095)。

摘　　要：The mechanical and diffusion properties of Ti-Ta-Fe alloys in the Ti-rich region were investigated by utilizing a high-throughput method, with the combination of nanoindentation and diffusion couple techniques.Five groups of ternary Ti-Ta-Fe diffusion couples were prepared after annealing at 1273 K for 25 h. The composition-dependent mechanical properties of bcc Ti-Ta-Fe system were experimentally determined by means of nanoindentation and electron probe microanalysis(EPMA) techniques. Moreover, the interdiffusion coefficients of Ti-Ta-Fe alloys at 1273 K were confirmed from the composition gradients of the ternary diffusion couples with the support of a pragmatic numerical inverse method. A composition-dependent database on the mechanical and diffusion properties of Ti-Ta-Fe alloys was carefully established and utilized for the discussion of the processability during the hot working. The results indicated that the content of Fe should be controlled for the Ti alloys with high hardness and low Young’s modulus.结合纳米压痕和扩散偶方法对Ti-Ta-Fe合金富Ti端的力学性能和扩散性能开展高通量研究。通过在1273 K固溶退火25 h制备5组三元Ti-Ta-Fe扩散偶。借助纳米压痕和电子探针等技术确定Ti-Ta-Fe体系体心立方相随成分变化的力学性能。利用实用高效数值回归方法从三元扩散偶的成分梯度中获取1273 K温度下的互扩散系数。基于以上实验结果构建一套Ti-Ta-Fe合金随成分变化的力学和扩散性能数据库。该数据库可用于钛合金热加工过程中的加工变形性能分析。结果表明,控制Fe含量可提高钛合金的硬度和降低杨氏模量。

关 键 词：Ti-Ta-Fe alloys diffusion couple NANOINDENTATION interdiffusion coefficients mechanical properties 

分 类 号：TG146.23[一般工业技术—材料科学与工程]