A MODEL OF THERMOMECHANICAL FATIGUE IN A LEAD-BASE ALLOY

被引：3

作者：

LAWSON, L

机构：

[1] Department of Materials Science and Engineering, Robert R. McCormick School of Engineering and Applied Science, Northwestern University, Evanston

来源：

JOURNAL OF MATERIALS RESEARCH | 1993年 / 8卷 / 04期

关键词：

D O I：

10.1557/JMR.1993.0745

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A model for the growth of a grain boundary crack in thermomechanical fatigue is derived for a single-phase or low alloy fcc metal at homologous temperatures near 0.5. Crack growth is hypothesized to proceed through vacancies binding in pairs at the crack tip to impurities or an oxide layer. This model is applied to 97Pb-3Sn, and the results compared with experiment. Good agreement is shown between the model and experiment, especially in predicting the effects of frequency and thermal-mechanical phasing. These effects do not appear to have been previously modeled successfully.

引用

页码：745 / 756

页数：12

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