FATIGUE-ENVIRONMENT INTERACTIONS IN A SIC/TI-15-3 COMPOSITE

被引：4

作者：

GAYDA, J

GABB, TP

LERCH, BA

机构：

[1] The authors are with the NASA Lewis Research Center, Cleveland, OH 44135, Mail Stop 49-3

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 1993年 / 15卷 / 01期

关键词：

FATIGUE; ENVIRONMENT; TITANIUM MATRIX COMPOSITE;

D O I：

10.1016/0142-1123(93)90076-3

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Load-controlled isothermal and non-isothermal fatigue lives of a [0-degrees]8 SiC/Ti-15-3 were evaluated at temperatures between 150 and 550-degrees-C and a target strain range of about 0.45%. In non-isothermal fatigue tests, load was first cycled at minimum temperature and then temperature was cycled at zero load. For fatigue tests with peak temperatures at or above 300-degrees-C, fatigue life was dramatically reduced compared to that at 150-degrees-C. The shortest life was produced by the non-isothermal test with the greatest temperature range (DELTAT = 400-degrees-C) and highest peak temperature (T(max) = 550-degrees-C). Vacuum testing showed that much of the life reduction under isothermal and non-isothermal conditions was related to environmental effects, although the nature of the fatigue-environment interaction was decidedly different for the isothermal and non-isothermal test cycles which were studied.

引用

页码：41 / 45

页数：5