Mechanism of a dual-phase Ti-Nb alloy exhibiting near-linear elastic deformation  

作　　者：Yan Guo Wang Ding Wen Ma Shun Guo Hao-Dong Meng Nian-Yao Xu 

机构地区：[1]School of Automotive Engineering,Changzhou Institute of Technology,Changzhou 213032,China [2]School of Materials Science and Engineering,Jiangsu University,Zhenjiang 212013,China [3]Youke Publishing Co.,Ltd,China Grinm Group Co.,Ltd,Beijing 100088,China

出　　处：《Rare Metals》2024年第5期2282-2289,共8页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.52175410);the Six Talent Peaks Project in Jiangsu Province(No.2019-XCL-113);Zhenjiang Science&Technology Program(No.GY2020001);the Project of Faculty of Agricultural Equipment of Jiangsu University(No.NZXB20200101)。

摘　　要：In this work,the underlying mechanism responsible for the near-linear elastic deformation behavior of a dual-phase Ti-Nb alloy consisting of β and α'' phase with large recoverable strain was systematically elucidated.Based on in situ synchrotron X-ray diffraction(SXRD)analyses,it was found that besides intrinsic elastic deformation,a slight reversible β-α'' stress-induced martensitic(SIM)transformation,which proceeded in a consecutive mode under the retarding effect of micro-defects,took place during the near-linear elastic deformation.After unloading,a small amount of residual macroscopic strain remained in the specimen due to the incomplete reverse α''→β transformation on unloading.The high near-linear elastic deformability of the cold drawing(CD)Ti-Nb alloy has been revealed to be attributed to the coupling actions of intrinsic elasticity as well as the consecutive and reversible β-α'' SIM transformation.Our research may contribute to a new avenue for the design and development of novel dual-phase Ti-based alloys with desirable elastic deformability.

关 键 词：Titanium alloys DUAL-PHASE Near-linear elastic deformation MARTENSITICTRANSFORMATION 

分 类 号：TG146.23[一般工业技术—材料科学与工程]