A steady-state model for diffusion-controlled fracture

Authors
Xu, Y Bassani, JL
Citation
Y. Xu et Jl. Bassani, A steady-state model for diffusion-controlled fracture, MAT SCI E A, 260(1-2), 1999, pp. 48-54
Citations number
18
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN journal
09215093 → ACNP
Volume
260
Issue
1-2
Year of publication
1999
Pages
48 - 54
Database
ISI
SICI code
0921-5093(199902)260:1-2<48:ASMFDF>2.0.ZU;2-P
Abstract
Elevated temperature cracking associated with embrittlement from intergranu lar diffusion of impurities is studied using cohesive zone model for small- scale creep, diffusion and damage. The constitutive equation for the cohesi ve zone is coupled with stress-assisted diffusion of impurities into the gr ain boundary. A Kachanov-type damage model is used to describe the effect o f impurity concentration on grain boundary strength. Numerical studies reve al the influence of various material parameters and loading conditions on t he cracking process. (C) 1999 Published by Elsevier Science S.A. All rights reserved.