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
收藏
页码：47 / 54
页数：8
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