The four-step multiple stage transformation in deformed and annealed Ti49Ni51 shape memory alloy

被引：45

作者：

Su, PC ^{[1
]}

Wu, SK ^{[1
]}

机构：

[1] Natl Taiwan Univ, Dept Mat Sci & Engn, Taipei 106, Taiwan

来源：

ACTA MATERIALIA | 2004年 / 52卷 / 05期

关键词：

cold working; annealing; differential scanning calorimetry; shape memory alloys; martensitic transformation;

D O I：

10.1016/j.actamat.2003.10.044

中图分类号：

T [工业技术];

学科分类号：

08 [工学];

摘要：

A four-step multiple stage transformation is observed in 20% deformed and 500 degreesC annealed Ti49Ni51 shape memory alloy. Two extra B2 --> B19' transformation peaks appear before the previously described B2 --> R and R --> B19' peaks while cooling, and these correspond to one new peak, which appears after the original B19' --> B2 peak during heating. These two extra peaks are caused by the combined effect of severe cold-working and long-time annealing on Ti49Ni51 alloy, and they come separately from the B2 --> B19' transformation occurring in regions with low and high dislocation densities, which are originally suppressed by cold-working. (C) 2003 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：1117 / 1122

页数：6

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