The migration of spheroidal cementite towards the surface in nanostructured AISI 52100 steel

被引：11

作者：

Amanov, A. ^{[1
]}

Cho, I. S. ^{[2
]}

Park, I. G. ^{[3
]}

Pyun, Y. S. ^{[1
]}

机构：

[1] Sun Moon Univ, Dept Mech Engn, Asan 31460, South Korea

[2] Mbrosia Co Ltd, Asan 31460, South Korea

[3] Sun Moon Univ, Dept Hybrid Engn, Asan 31460, South Korea

来源：

MATERIALS LETTERS | 2016年 / 174卷

关键词：

AISI; 52100; Cementite; Grain size; Hardness; UNSM; DEFORMATION; STRENGTH; CARBIDE; COPPER;

D O I：

10.1016/j.matlet.2016.03.096

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The migration of spheroidal cementite (Fe3C) particles towards the surface by ultrasonic nanocrystalline surface modification (UNSM) technique in AISI 52100 bearing steel was discovered. The migration of Fe3C particles towards the surface, and their density and grain size at the top surface were assessed using an electron backscattered diffraction (EBSD) and a transmission electron microscopy (TEM), respectively. A mechanically continuous cyclic loading of UNSM treatment process refined the Fe3C particles into nano sized particles along with ferrite (Fe3O4) nano-grains resulted in the migration of Fe3C particles towards the surface. The gradient nano-grained specimen with an increased Fe3C density exhibited a nearly 3 times higher hardness comparable to that of the coarse-grain one. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：142 / 145

页数：4

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