EFFECT OF GRAIN-SIZE ON THE MARTENSITIC-TRANSFORMATION IN NITI ALLOY

被引：63
作者：
GIL, FJ
MANERO, JM
PLANELL, JA
机构：
[1] Departamento Ciencia de los Materiales e Ingeniería Metalúrgica, ETS Ingenieros Industriales de Barcelona, Universidad Politécnica de Catalunya, Barcelona, 08028
来源：
JOURNAL OF MATERIALS SCIENCE | 1995年 / 30卷 / 10期
关键词：
D O I：
10.1007/BF00362129
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of grain size on the martensitic transformation in Ni42Ti shape memory alloy has been studied. The kinetics of grain growth has been evaluated and the influence of different grain sizes on the transformation temperatures and the thermodynamic magnitudes has been reported. Image analysis and flow calorimetry techniques have been used. The study shows that grain boundaries favour the martensitic transformation and at the same time obstruct retransformation. Enthalpy and entropy variations are independent of grain size, but elastic energy decreases with the grain size.
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收藏
页码：2526 / 2530
页数：5
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