Study of R-phase transformation in a Ti-50.7at%Ni alloy by in-situ transmission electron microscopy observations

被引：23
|
作者：
Cai, W
Murakami, Y
Otsuka, K [1 ]
机构：
[1] Univ Tsukuba, Inst Mat Sci, Tsukuba, Ibaraki 3058573, Japan
[2] Tohoku Univ, Inst Adv Mat Proc, Katahira, Sendai 98077, Japan
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1999年 / 273卷
关键词：
martensite; R-phase; Ni-Ti; incommensurability;
D O I：
10.1016/S0921-5093(99)00367-6
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The R-phase transformation in a Ti-50.7at%Ni alloy was investigated by in-situ transmission electron microscopy (TEM) observations using double-tilt cooling stages, and the incommensurability of 1/3 diffuse scattering in the process of the transformation was examined by using imaging plates. It is shown that the incommensurate diffuse scattering exists in the parent phase within a wide temperature range above the Rs temperature and that the incommensurability decreases with decreasing temperature. The R-phase transformation starts at the Rs temperature where the electrical resistance starts to increase and the R-phase is commensurate even in the state just after formation. (C) 1999 Elsevier Science S.A. All rights reserved.
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页码：186 / 189
页数：4
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