ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559
Regular Article
An Original Way for Producing a 2.4 GPa Strength Ductile Steel by Rolling of Martensite
Jean-Philippe MasseBechir ChéhabHatem ZurobDavid EmburyXian WangOlivier Bouaziz
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2014 Volume 54 Issue 1 Pages 235-239

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Abstract

A compositionally-graded steel composed of martensite with 0.4%C on the centre and bainite with 0.1%C on the surface was manufactured by partial decarburization. It is reported that the as quenched material can be cold rolled up to an equivalent strain of 1.5 without cracks. The mechanical properties of the cold-rolled material exhibits up to 2.5 GPa strength and ductility. A simple mechanical model is developed to predict the stress state after rolling of the graded structure explaining the good ductility of the present high strength materials.

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© 2014 by The Iron and Steel Institute of Japan
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