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Investigating the effects of quenching and tempering on steel microstructures by Magnetic Barkhausen Noise method
Date
2012-12-01
Author
Gür, Cemil Hakan
Çam, İbrahim
Metadata
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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.
Subject Keywords
Magnetic barkhausen noise
,
Microstructure
,
Quenching
,
Steel
,
Tempering
URI
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84872006552&origin=inward
https://hdl.handle.net/11511/71309
Conference Name
6th International Quenching and Control of Distortion Conference: Quenching Control and Distortion, Including the 4th International Distortion Engineering Conference
Collections
Department of Metallurgical and Materials Engineering, Conference / Seminar
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Deformation and annealing texture in the cold rolled low carbon steels is important for sheet metal forming operations and service performance. The aim of this study is to non-destructively investigate the effect of texture on magnetic anisotropy. Various samples having different textures and residual stress states, due to different % reduction in thickness, annealing and stress relieving treatment, were prepared. Texture maps were obtained by Magnetic Barkhausen noise measurements performed with 100 steps ...
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Variations of surface residual stresses with subsequent weld passes were investigated in API 5L X70 steel plates by the magnetic barkhausen noise (MBN) technique. The plates were welded by applying a number of different passes under fully clamped conditions. After each weld pass, the MBN signal and hardness distributions on the front and back surfaces of the plates were measured. A specific calibration procedure and setup were used for conversion of the MBN signals into elastic stress values. The results we...
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Microstructure characterization of heat-treated ferromagnetic steels by magnetic barkhausen noise method
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This paper presents non-destructive evaluation of microstructures of heat treated steels by the Magnetic Barkhausen Noise (MBN) method. Various steel specimens having different microstructures were produced by appropriate heat treatments. All specimens were characterized by metallographic examinations, hardness and MBN measurements. The results showed that MBN parameters are highly sensitive to the variations in the microstructure, and this method is a promising candidate for practical non-destructive chara...
Characterization of steel microstructures by magnetic barkhausen noise technique
Gür, Cemil Hakan (2012-12-01)
Optimization and control of the microstructure is vital for improving performance and service life of the steel components. Development of non-destructive techniques for microstructure characterization has been a challenging task for many years. Magnetic Barkhausen Noise method is a non-destructive evaluation technique with high potential for characterization of steels. This paper summarizes the related studies performed at METU.
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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.
