Cyclic plasticity at pores and inclusions in cast Al-Si alloys

被引：119

作者：

Fan, JH ^{[1
]}

McDowell, DL

Horstemeyer, MF

Gall, K

机构：

[1] Alfred Univ, Div Mech Engn, Alfred, NY 14802 USA

[2] Chongqing Univ, Dept Engn Mech, Chongqing 400044, Peoples R China

[3] Georgia Inst Technol, GWW Sch Mech Engn, Atlanta, GA 30332 USA

[4] Sandia Natl Labs, Ctr Mat Sci & Engn, Livermore, CA 94551 USA

[5] Univ Colorado, Dept Mech Engn, Boulder, CO 80309 USA

来源：

ENGINEERING FRACTURE MECHANICS | 2003年 / 70卷 / 10期

基金：

中国国家自然科学基金;

关键词：

fatigue; cast alloys; computational micromechanics; particle effects; pore effects;

D O I：

10.1016/S0013-7944(02)00097-8

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Finite element analyses of micronotches including pores and silicon particles of an A356 aluminum alloy were performed to elucidate microstructure-property relations for fatigue crack incubation. Several important findings resulted. By varying the particle and pore size, spacing, aspect ratio, and clustering, the relative microstructural differences were quantified related to micronotch root cyclic plasticity. Results from realistic two-dimensional microstructures showed that minimal microstructure-scale cyclic plasticity corresponds well to the measured fatigue strength at 10(7) cycles for low porosity A356 aluminum alloy specimens. "Realistic" and idealized particles/pores simulations were used to formulate a local Coffin-Manson type law for crack incubation. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：1281 / 1302

页数：22

共 24 条

[1]

[Anonymous], ABAQUS

[2]

Brockenbrough JR, 1994, NASA C PUBLICATION, V3274, P71

[3] CASTING DEFECTS AND THE FATIGUE BEHAVIOR OF AN ALUMINUM CASTING ALLOY [J].