MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Influence of Al on Shape Memory Effect and Twinning Induced Plasticity of Fe-Mn-Si-Al System Alloy
Motomichi KoyamaMasato MurakamiKazuyuki OgawaTakehiko KikuchiTakahiro Sawaguchi
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2007 Volume 48 Issue 10 Pages 2729-2734

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Abstract

We have investigated the shape memory effect and ductility of Fe-30Mn-(6-x)Si-xAl (x=0, 1, 2 and 3; in mass-%) alloys. The alloy with x=0 shows a good shape memory effect but suffers from poor ductility, while the alloys with x=2 and 3 are well-known TWIP (twinning induced plasticity) steels that show high ductility. In the present study, it was found that the shape memory effect is observed in the samples with x=0 and 1, but disappears when x exceeds 2. On the other hand, the ductility almost linearly increases with increasing the amount of Al. A good combination of the shape memory effect and ductility was achieved in the alloy with x=1.

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© 2007 The Japan Institute of Metals and Materials
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