Plasticity of Nanocrystalline BCC Iron Fabricated by Severe Plastic Deformation by Friction

被引：0

作者：

Yurkova, O. L. ^{[1
]}

Byakova, O. V. ^{[1
]}

Milman, Yu. V. ^{[1
]}

机构：

[1] Natl Acad Sci Ukraine, IN Frantsevich Inst Problems Mat Sci, UA-142 Kiev, Ukraine

来源：

METALLOFIZIKA I NOVEISHIE TEKHNOLOGII | 2009年 / 31卷 / 03期

关键词：

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Using nanoindentation technique, relationship between the microstructure and the mechanical parameters such as hardness, H-h, and plasticity characteristic, delta(A), are found to be actually dependent on the grain size of alpha-Fe samples subjected to severe plastic deformation by friction in argon atmosphere. Unlike f.c.c. metals, in which the decreasing of grain size to 20 nm results, in hardness rise only, and plasticity goes down,. there is a reverse effect in b.c.c.-Fe, namely, the decreasing of grains sizes from 50 to 20 nm causes the decrease of hardness from 5.8 to 3.7 GPa and increase of plasticity characteristic, delta(A), from 0.82 to 0.87.

引用

页码：405 / 412

页数：8

共 15 条

[11] Pozdnyakov V. A., 2002, FIZ TVERD TELA, V44, P705
[12] TREFILOV VI, 1975, FIZICH OSNOVY PROCHN
[13] Nanocrystalline structure in steels produced by various severe plastic deformation processes
Umemoto, M
Todaka, Y
Li, J
Tsuchiya, K
[J]. NANOMATERIALS BY SEVERE PLASTIC DEFORMATION, 2006, 503-504 : 11 - 18
[14] VALIYEV RZ, 2000, NANOSTRUKTUR MATERIA
[15] Deformation in nanocrystalline metals
Van Swygenhoven, Helena
Weertman, Julia R.
[J]. MATERIALS TODAY, 2006, 9 (05) : 24 - 31

← 1 2 →