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Effect of temperature, microstructure, and stress state on the low cycle fatigue behavior of WaspaloySpecimens of Waspaloy of two different microstructures were tested in uniaxial and torsional low-cycle fatigue at 24 and 649 C. For all specimens, deformation and failure mechanisms are found to be independent of stress state at 24 C; in both microstructures, failure is associated with the formation of shear cracks. At 649 C, deformation and failure mechanisms for the fine-grain large gamma-prime specimens are independent of stress state, and the mechanisms are similar to those observed at 24 C. For the coarse-grain small gamma-prime specimens, however, failure occurs on principal planes in torsion and on shear plane in uniaxial tension. The results are interpreted in terms of deformation mode and microstructural instability.
Document ID
19880048695
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Stahl, D. R.
(Georgia Inst. of Tech. Atlanta, GA, United States)
Antolovich, S. D.
(Georgia Institute of Technology Atlanta, United States)
Mirdamadi, M.
(Georgia Inst. of Tech. Atlanta, GA, United States)
Zamrik, S. Y.
(Pennsylvania State University University Park, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1988
Subject Category
Metallic Materials
Accession Number
88A35922
Funding Number(s)
CONTRACT_GRANT: NAG3-264
Distribution Limits
Public
Copyright
Other

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