Effect of annealing on deformation-induced martensite stabilisation of NiTi

被引：38

作者：

Mahmud, Abdus Samad ^{[1
]}

Yang, Hong ^{[1
]}

Tee, Sinxian ^{[1
]}

Rio, Gerard ^{[1
,2
]}

Liu, Yinong ^{[1
]}

机构：

[1] Univ Western Australia, Sch Mech Engn, Nedlands, WA 6009, Australia

[2] Univ Rennes 2, Lab Gen Mec & Mat, F-56321 Rennes, France

来源：

INTERMETALLICS | 2008年 / 16卷 / 02期

关键词：

martensitic transformations; shape-memory effects; calorimetry; mechanical testing;

D O I：

10.1016/j.intermet.2007.09.003

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 ; 081704 ;

摘要：

It is known that deformation via martensitic transformation stabilises the martensite in NiTi shape-memory alloys, as manifested in the increase of the temperature for the reverse transformation of the deformed martensite. This stabilisation has direct implication to the design of shape-memory devices. This study investigates the effect of annealing temperature after cold working on the martensite stabilisation effect of a Ti-50.2 at% Ni alloy. It is found that the stabilisation effect, measured as the increase of the reverse transformation temperature, decreases with decreasing annealing temperature. This implies that, for near-equiatomic NiTi alloys, the pseudoelastic behaviour, which is achieved at low annealing temperatures, is less affected by the stabilisation effect than the shape-memory effect, which is optimised by annealing at high annealing temperatures. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：209 / 214

页数：6

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