DSC study of the effect of aging temperature on the reverse martensitic transformation in porous Ni-rich NiTi shape memory alloy fabricated by combustion synthesis

被引：26
|
作者：
Chu, CL [1 ]
Chung, CY
Lin, PH
机构：
[1] Southeast Univ, Dept Mat Sci & Engn, Nanjing 210018, Peoples R China
[2] City Univ Hong Kong, Dept Phys & Mat Sci, Hong Kong, Peoples R China
来源：
MATERIALS LETTERS | 2005年 / 59卷 / 04期
关键词：
NiTi; shape memory alloys (SMA); porous material; combustion synthesis; phase transformation behaviors;
D O I：
10.1016/j.matlet.2004.08.036
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of aging temperature on the reverse martensitic transformation in the SHS-synthesized porous Ni-rich NiTi SMA after solution treated at 1050 degreesC for 4 h is investigated using differential scanning calorimeter (DSC) and discussed. The type of reverse martensitic transformation changes from one step B19'-->B2 (after solution treated) through two steps B19'-->R-->B2 (after aged at 400, 450 and 475 degreesC) back to one step B19'-->B2 (after aged at 500 degreesC). Both the austenite finish temperature (A(f)) and the peak temperature corresponding to the transformation of R-->B2 decrease with the rise of the aging temperature. The experimental results also indicate that shape memory properties of porous NiTi SMA fabricated by SHS can be improved by optimizing the aging technology. (C) 2004 Elsevier B.V All rights reserved.
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页码：404 / 407
页数：4
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