Application of the average field method to the prediction of stable shapes of coherent precipitates under uniaxial stresses

被引：5

作者：

Onaka, S ^{[1
]}

Fujii, T ^{[1
]}

Suzuki, Y ^{[1
]}

Kato, M ^{[1
]}

机构：

[1] Tokyo Inst Technol, Dept Innovat & Engn Mat, Yokohama, Kanagawa 2268502, Japan

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2000年 / 285卷 / 1-2期

关键词：

Mori-Tanaka's theorem; Eshelby's method; rafting; micromechanics; coherent precipitates; stable shapes;

D O I：

10.1016/S0921-5093(00)00644-4

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Stable shapes of misfitted precipitates are discussed with mechanical free energy minimization criterion. The Mori-Tanaka concept of the 'average field' is applied to evaluate stress and strain in the materials containing the precipitates with various volume fractions. With the phenomenon of rafting in superalloys in mind, the stable shapes are calculated for coherent precipitates with purely dilatational (or constrictive) misfit strains in materials under uniaxial external stresses. Maps to show the stable shapes are obtained for various volume fractions of the precipitates as a function of magnitudes of external stresses, misfit strains and elastic moduli. Effects of the volume fraction on the stable shapes of precipitates are discussed. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：246 / 252

页数：7

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