An original way for producing a 2.5 GPa strength ductile steel by rolling of martensite

Details An original way for producing a 2.5 GPa strength ductile steel by rolling of martensite An original way for producing a 2.5 GPa strength ductile steel by rolling of martensite

2012-03-14

arxiv.org/abs/1203.3003v1

Physics

Condensed Matter

Materials Science

Scientific paper

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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