Precipitation hardening of a FeMnC TWIP steel by vanadium carbides

被引：36

作者：

Chateau, J. P. ^{[1
]}

Dumay, A. ^{[1
]}

Allain, S. ^{[2
]}

Jacques, A. ^{[1
]}

机构：

[1] Ecole Mines, Jean Lamour Inst, CS14234, Parc Saurupt, F-54042 Nancy, France

[2] Arcelormittal Maizieres Res SA, F-57283 Metz, France

来源：

15TH INTERNATIONAL CONFERENCE ON THE STRENGTH OF MATERIALS (ICSMA-15) | 2010年 / 240卷

关键词：

AUSTENITIC STEEL; MODEL;

D O I：

10.1088/1742-6596/240/1/012023

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A fine precipitation of spherical vanadium carbides is obtained in a Fe22Mn0.6C base steel during the final recrystallisation heat treatment. Precipitates formed in recrystallised grains have a cube-cube orientation relation with the matrix, confirmed by Moire patterns observed in TEM. The theoretical size for loss of coherency is below the nm, much lower than the precipitates' size. Deformation contrasts were observed around the precipitates and their residual coherency was measured. It was shown to decrease when the carbides' size increases, to vanish above 30 nm. The net increase of the yield stress was estimated to be 140 MPa. Precipitation hardening by vanadium carbides do not alter the strain hardening rate by TWIP effect, as they do not seem to act as obstacles for the propagation of microtwins.

引用

页数：4

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