ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559
Regular Article
Mechanical Properties of H-charged Fe–18Mn–1.5Al–0.6C TWIP Steel
Lei ChenSeok-Jae LeeBruno Charles De Cooman
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JOURNALS OPEN ACCESS

2012 Volume 52 Issue 9 Pages 1670-1677

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Abstract

The effect of H on the mechanical properties of a high Mn twinning-induced plasticity steel was evaluated by comparing the properties of H-free and H-charged tensile specimens deformed at different temperatures prior to H-charging. The H-charging resulted in a reduction of the total elongation. The fracture surface of the tested samples revealed an inhomogeneous fracture appearance with an intergranular fracture in the range of 10 μm to 20 μm below the sample surface. The observations strongly suggest that it is this intergranular fracture in the surface layer which is the cause of the reduction of elongation in H-charged TWIP steel.

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© 2012 by The Iron and Steel Institute of Japan
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