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Necking and fracture of advanced high strength steels

▶ Three steels with same thickness, yield strength and similar plastic tensile properties were studied. ▶ They showed very different forming and fracture behaviour depending on the strain path. ▶ This was due to the differences in microstructure between these three steels. ▶ The second phase deforma...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2011-03, Vol.528 (6), p.3010-3013
Main Authors: Nikhare, C., Hodgson, P.D., Weiss, M.
Format: Article
Language:English
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Summary:▶ Three steels with same thickness, yield strength and similar plastic tensile properties were studied. ▶ They showed very different forming and fracture behaviour depending on the strain path. ▶ This was due to the differences in microstructure between these three steels. ▶ The second phase deformation was the dominant factor to get the ductile or rapid post uniform deformation failure. The fracture behaviour of two Advanced-High-Strength-Steels (AHSS) of similar yield strength can have a sudden change from ductile to rapid post uniform deformation failure depending on the strain-path. Microstructure analysis indicates that the different failure modes are due to a change in the ability of the second phase to deform.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2010.12.098