Nanostructure formation and carbides dissolution in rail steel deformed by high pressure torsion

被引：0

作者：

Ivanisenko, YV ^{[1
]}

Valiev, RZ ^{[1
]}

Lojkowski, W ^{[1
]}

Grob, A ^{[1
]}

Fecht, HJ ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Metal Superplast Problems, Ufa 450001, Russia

来源：

ULTRAFINE GRAINED MATERIALS II | 2002年

关键词：

high pressure torsion; nanocrystalline; carbon steel; cementite dissolution;

D O I：

暂无

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The microstructure and the phase composition evolution of a commercial UIC 860V steel during high pressure torsion (HPT) were investigated by means of transmission electron microscopy, thermomagnetic analysis and X-ray diffraction. HPT leads to a decrease of the grain size to 10 nm and total cementite dissolution. In the nanocrystalline state the steel reaches the hardness of 11 GPa, which is 3 times higher than that of the initial state. The partial cementite dissolution starts already at the strain degree of gamma = 92. The carbon distribution in the iron matrix seems to depend on the deformation degree.

引用

页码：47 / 54

页数：8

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