An Original Way for Producing a 2.4 GPa Strength Ductile Steel by Rolling of Martensite

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 propertie...

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Bibliographic Details
Published in:ISIJ International 2014/01/15, Vol.54(1), pp.235-239
Main Authors: Masse, Jean-Philippe, Chéhab, Bechir, Zurob, Hatem, Embury, David, Wang, Xian, Bouaziz, Olivier
Format: Article
Language:English
Subjects:
Applied sciences
Condensed Matter
ductility
Exact sciences and technology
graded
martensite
Materials Science
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metals. Metallurgy
Physics
rolling
strength
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Summary: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.
ISSN:0915-1559
1347-5460
DOI:10.2355/isijinternational.54.235