Superelastic effect in Ti-rich high entropy alloys via stress-induced martensitic transformation

被引：48
作者：
Wang, Lu [1 ]
Fu, Chao [1 ]
Wu, Yidong [1 ]
Li, Runguang [1 ]
Hui, Xidong [1 ]
Wang, Yandong [1 ]
机构：
[1] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China
来源：
SCRIPTA MATERIALIA | 2019年 / 162卷
基金：
中国国家自然科学基金;
关键词：
High entropy alloys; Stress-induced martensitic transformation; Superelastic effect; In situ X-ray diffraction; X-RAY-DIFFRACTION; MEMORY; TEMPERATURE; BEHAVIOR; ZR; MICROSTRUCTURE; SN;
D O I：
10.1016/j.scriptamat.2018.10.035
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
This letter reports an outstanding superelastic effect in Ti-rich TiZrHfAlNb high entropy alloys for the first time, which is exhibited by comprehensive combination of the maximum total recovery strain, fully recoverable strain and corresponding tensile strength up to 5.2%, 4.0% and 900 MPa, respectively. It has been confirmed that these alloys are only composed of metastable beta and martensite alpha '' phase, and to phase is suppressed. The in situ X-ray diffraction experiment reveals that reversible stress-induced martensitic transformation between beta <-> alpha '' endows the alloys superelasticity, while the plastic deformation and reorientation of martensite inhibit the recovery phase transformation. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：112 / 117
页数：6
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