Investigating the effects of quenching and tempering on steel microstructures by Magnetic Barkhausen Noise method

2012-12-01
Non-destructive evaluation of the properties of the heat treated steels is a challenging task. In this study, quenched and quenched-tempered (200°C and 600°C) SAE 1040 and SAE 4140 steels were characterized by Magnetic Barkhausen Noise (MBN) method. First, the microstructures of the samples were characterized by SEM examination and hardness measurements. Then, the MBN signals were evaluated by using a commercial Barkhausen noise system. The results showed that the MBN response of the as-quenched martensite is very low. However, as tempering temperature increases, in contrast to the reduction in hardness, the MBN response of the microstructure increases due to the enhancement of domain wall displacement with softening of the martensite. MBN method seems to be a promising tool for evaluating microstructure of quenched and tempered steels after establishing the quantitative relationships between MBN parameters and the microstructure. Copyright © 2012 ASM International® All rights reserved.
6th International Quenching and Control of Distortion Conference: Quenching Control and Distortion, Including the 4th International Distortion Engineering Conference

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Citation Formats
C. H. Gür and İ. Çam, “Investigating the effects of quenching and tempering on steel microstructures by Magnetic Barkhausen Noise method,” Chicago, USA, 2012, Accessed: 00, 2021. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84872006552&origin=inward.