Age-induced four-stage transformation in Ni-rich NiTi shape memory alloys

被引：26

作者：

Chiang, L. J. ^{[1
]}

Li, C. H. ^{[1
]}

Hsu, Y. F. ^{[2
]}

Wang, W. H. ^{[1
]}

机构：

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

[2] Natl Taipei Univ Technol, Dept Mat & Mineral Resources Engn, Taipei 106, Taiwan

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2008年 / 458卷 / 1-2期

关键词：

precipitation; grain boundaries; thermal analysis;

D O I：

10.1016/j.jallcom.2007.04.006

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 [物理化学]; 081704 [应用化学];

摘要：

A four-stage transformation has been observed in an aged Ti-50.7 at.%Ni shape memory alloy by differential scanning calorimetry (DSC). Such phenomenon is able to occur in the alloys with compositions around 50.7 at.%Ni by aging at 673 K. The multi-stage transformation behavior observed in this study is attributed to the complex microstructural evolution, i.e., formation of large-scale and small-scale heterogeneities which induced various stress fields and affected the phase transformation sequence. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：231 / 237

页数：7

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