Strain-induced Microstructure Refinement in a Tool Steel Subjected to Surface Mechanical Attrition Treatment

被引：35

作者：

Lu, Shoudan ^{[1
]}

Wang, Zhenbo ^{[1
]}

Lu, Ke ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China

来源：

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2010年 / 26卷 / 03期

基金：

国家高技术研究发展计划(863计划); 中国国家自然科学基金;

关键词：

Nanostructured and nanocrystalline material; AISI H13 tool steel; Grain refinement; Surface mechanical attrition treatment (SMAT); Carbides; INDUCED GRAIN-REFINEMENT; PLASTIC-DEFORMATION; NANOMETER-SCALE; EVOLUTION; COPPER;

D O I：

10.1016/S1005-0302(10)60043-6

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A nanostructured surface layer has been fabricated on an AISI H13 tool steel by means of surface mechanical attrition treatment (SMAT). Strain-induced refinement processes of ferrite grains and carbide particles have been investigated by transmission electron microscopy (TEM) and scanning electron microscopy (SEM) in the SMAT surface layer. Grain refinement of ferrite is found to be dominated by dislocation activities and greatly facilitated by a large number of carbide particles at a depth >20 mu m. The comparisons with microstructure refinement processes in other SMAT ferrite steels indicate that a larger volume fraction of carbide particles with a lower shear strength is expected to facilitate the refinement process of ferrite grains.

引用

页码：258 / 263

页数：6

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