MODEL FOR THE HIGH-TEMPERATURE EMBRITTLEMENT OF METALS CONTAINING HELIUM

被引:62
作者
TRINKAUS, H
ULLMAIER, H
机构
[1] Institut für Festkörperforschung der Kernforschungsanlage, Jülich
来源
PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES | 1979年 / 39卷 / 05期
关键词
D O I
10.1080/01418617908239292
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A model for the high-temperature embrittlement of He-containing metals is presented. The model is based on the formation of small He bubbles within the grains and on the nucleation and growth of grain-boundary cavities under the influence of He and external stress. These processes explain the strengthening of the grains and the simultaneous weakening of the grain boundaries. After a careful analysis of nucleation and growth of grain-boundary cavities, an analytical expression for the time to rupture as a function of stress, He content, temperature and material parameters is derived. This expression is in satisfactory agreement with experimental data for He-implanted stainless steel samples (Sagüés, Schroeder, Kesternich and Ullmaier 1978). © 1979 Taylor & Francis Group, LLC.
引用
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页码:563 / 580
页数:18
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