Carbide dissolution in bearing steels

被引：54

作者：

Kang, J. -H. ^{[1
]}

Rivera-Diaz-del-Castillo, P. E. J. ^{[1
]}

机构：

[1] Univ Cambridge, Dept Mat Sci & Met, SKF Univ Technol Ctr, Cambridge CB2 3QZ, England

来源：

COMPUTATIONAL MATERIALS SCIENCE | 2013年 / 67卷

关键词：

Carbide dissolution; Cementite decomposition; Bearing steels; Rolling contact fatigue; Severe plastic deformation; TRANSMISSION ELECTRON-MICROSCOPY; DRAWN PEARLITIC STEEL; MULTICOMPONENT MULTIPHASE SYSTEMS; ROLLING-CONTACT FATIGUE; HIGH-PRESSURE TORSION; CEMENTITE DISSOLUTION; PLASTIC-DEFORMATION; ATOM-PROBE; MICROSTRUCTURAL CHANGES; CARBON-STEEL;

D O I：

10.1016/j.commatsci.2012.09.022

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The conditions leading to precipitate dissolution in a variety of bearing steels are studied. Computational thermodynamics and kinetics are employed to determine the microstructural effects leading to precipitate instability, and further dissolution. It is found that there exists a characteristic threshold value of the driving force that induces dissolution and that carbon migration from cementite towards the dislocation strain fields can play a dominant role. Microstructures not fully precipitated and far from their equilibrium volume fraction appear to be much more stable than their fully developed counterparts. An explanation to the occurrence of lenticular carbides engulfing white etching bands and areas is provided. It is discussed how dislocation development and migration in the neighbourhood of ferrite/carbide interfaces control carbide dissolution. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：364 / 372

页数：9

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