Abstract
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 defor-mation,a slight reversible β ↔ α"stress-induced marten-sitic(SIM)transformation,which proceeded in a consecutive mode under the retarding effect of micro-de-fects,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 cou-pling actions of intrinsic elasticity as well as the consecu-tive 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.
基金项目
National Natural Science Foundation of China(52175410)
Six Talent Peaks Project in Jiangsu Province(2019-XCL-113)
Zhenjiang Science & Technology Program(GY2020001)
Project of Faculty of Agricultural Equipment of Jiangsu University(NZXB20200101)
Advanced Photon Source,a U.S.Department of Energy(DOE)Office of Science User Facility operated for the DOE Office of Science(DE-AC02-06CH11357)
NETL
NSTL
万方数据