MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Ultrasonic Evaluation of Temper-Embrittlement for Martensitic Stainless Steel
Cheng-Hsun HsuHwei-Yuan TengSheng-Chien Chiu
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2003 Volume 44 Issue 11 Pages 2363-2368

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Abstract

This research studied the possibility of non-destructive detection of temper-embrittlement in tempered CA-15 martensitic stainless steel (MSS). It was found that secondary hardening phenomenon existed in tempering temperature range of 573-673 K for the MSS in this study. Ultrasonic responses, both in terms of acoustic velocity and attenuation, exhibited changes with respective to the microstructure variation. Microstructural constituent of chromium carbide (Cr23C6 type) precipitates was found to have resulted in the temper-embrittlement of the MSS and also was responsible for the changes of the ultrasonic behavior of the material.

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© 2003 The Japan Institute of Metals and Materials
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