Effect of deformation on the stability of stress-induced martensite in nanocrystalline NiTi shape memory alloy

被引：7
|
作者：
Shi, Xiaobin [1 ]
Yu, Mengying [1 ]
Guo, Fangmin [1 ]
Liu, Zhenyang [1 ]
Jiang, Daqiang [1 ]
Han, Xiaodong [2 ]
Cui, Lishan [1 ]
机构：
[1] China Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R China
[2] Beijing Univ Technol, Inst Microstruct & Properties Adv Mat, Beijing 100124, Peoples R China
来源：
MATERIALS LETTERS | 2014年 / 131卷
基金：
中国国家自然科学基金;
关键词：
Phase transformation; Phase stability; Nanocrystalline materials; Prestrain; MECHANICAL-BEHAVIOR; PHASE-TRANSFORMATIONS; METALS; SIZE;
D O I：
10.1016/j.matlet.2014.06.001
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A nanocrystalline Ni-49.8 at%Ti alloy with an average grain size of about 16 am was acquired by cold-drawing and low-temperature annealing. The stability of stress-induced martensite of the nanocrystalline NiTi alloy was investigated by a differential scanning calorimeter (DSC). The results show that stress-induced B19' martensite was preserved when the samples were subjected to 14% and 16% prestrain. The DSC measurements reveal that the prestrained samples experience two-stage B19' -> B2 transformation upon the first heating process and the transformation temperature increases with an increasing prestrain. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：233 / 235
页数：3
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