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Influence of creep damage on the low cycle thermal-mechanical fatigue behavior of two tantalum base alloys

Author
Sheffler, K. D.
Published
May 1, 1972.
Physical Description
1 electronic document
Additional Creators
Doble, G. S.
Online Version

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Unclassified, Unlimited, Publicly available.
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Summary
Low cycle fatigue tests have been performed on the tantalum base alloys T-111 and ASTAR 811C with synchronized, independently programmed temperature and strain cycling. The thermal-mechanical cycles applied fell into three basic categories: these were isothermal cycling, in-phase thermal cycling, and out-of-phase thermal cycling. In-phase cycling was defined as tensile deformation associated with high temperature and compressive deformation with low temperature, while out-of-phase thermal cycling was defined as the reverse case. The in-phase thermal cycling had a pronounced detrimental influence on the fatigue life of both alloys, with the life reduction being greater in the solid solution strengthened T-111 alloy than in the carbide strengthened ASTAR 811C alloy. The out-of-phase tests also showed pronounced effects on the fatigue life of both alloys, although not as dramatic.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 19730004787.
Accession ID: 73N13514.
TRW-ER-7592.
NASA-CR-121001.
Terms of Use and Reproduction
No Copyright.
View MARC record | catkey: 15944667