MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Improvement of Oxidation Resistance of an Fe–Mn–Si–Cr Shape Memory Alloy by Annealing under Vacuum
Hiroyuki FukaiShigeru SuzukiNaoya MasahashiShuji HanadaTadakatsu MaruyamaHiroshi KuboYoshio Waseda
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2005 Volume 46 Issue 8 Pages 1745-1748

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Abstract

Electron microprobe microanalysis (EPMA), secondary ion mass spectrometry (SIMS) and X-ray photoelectron spectroscopy (XPS) were used for charactering the surface composition of an Fe–Mn–Si–Cr shape memory alloy. The effect of annealing under vacuum on the surface composition of the alloy was studied. It was found that the amount of manganese decreased, while the amount of chromium increased in a surface layer by annealing. The thickness of the surface layer is of the order of ten micrometers, which is comparable to that obtained by conventional plating or coating. As a result, the surface of the Fe–Mn–Si shape memory alloy annealed under a vacuum exhibited better oxidation resistant than that of the as-lapped alloy.

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© 2005 The Japan Institute of Metals and Materials
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