Abstract
This study shows there are significant changes occurring in the open volume defect concentration during fatigue cycling as measured by the S parameter. These changes are dependent upon the stress ratio, R = σmin/σmax, the maximum stress, σmax, and the number of fatigue cycles. The decline in the S parameter is due to the elimination of the residual vacancies. This decline is followed by an increase due to the generation of dislocations and the formation of small microcracks. This is followed by a decline in the S parameter due to growth of the microcracks ultimately leading to failure. Copyright © 1993 WILEY‐VCH Verlag GmbH & Co. KGaA
Recommended Citation
D. Hoeckelman and H. P. Leighly, "A Study Of Fatigue Failure In Superalloys Using Positron Annihilation," physica status solidi (a), vol. 138, no. 1, pp. 147 - 156, Wiley, Jan 1993.
The definitive version is available at https://doi.org/10.1002/pssa.2211380113
Department(s)
Materials Science and Engineering
Publication Status
Full Access
International Standard Serial Number (ISSN)
1521-396X; 0031-8965
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2023 Wiley, All rights reserved.
Publication Date
01 Jan 1993
