Effect of Microstructure on Shape-Memory Effect in Fe-32Mn-6.5Si Alloy

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外文摘要：The effect of heat treatment condition after cold rolling has been investigated on SME and transformation temperatures in an Fe-32Mn-6。5Si alloy。 The specimens heat treated at 873K and 973K experience no and partial recrystallization， respectively。 Above 1073K， grain size increases with increasing temperature and time。 With a decrease in grain size， stress for inducing ε martensite increases。 The unrecrystallized specimen shows the best SME due to training-like effect。 In recrystallized specimens， SME becomes better with an increase in grain size， which may be attributed to easy transformation by deformation。 Comparison of two specimens， which show best and worst SME， in the amount of induced ε leads to a suggestion that it is a major factor controlling SME。 With lowering heat treatment temperature， As point decreases while Af point increases， expanding the transformation range。 Therefore alloys with a large grain size exhibit a large shape change on a certain temperature change。

外文关键词：

FeMnSi alloygrain sizeshape-memory effectε-martensite volume fraction

作者：

K.K. Jee、W.Y. Jang、Y.H. Chung、M.C. Shin

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作者单位：

Division of Materials, Korea Institute of Science and Technology, Seoul 136-791, Korea

会议名称：

Shape Memory Materials and Its Applications

会议地点：

Kunming(CN);Kunming(CN)

会议母体文献：

International Conference on Shape Memory and Superelastic Technologies and Shape Memory Materials (SMST-SMM 2001), Sep 2-6, 2001, Kunming, China

页码：

p.423-426

出版时间：

2001