Detection of Expended Fatigue Life of AISI 4140 Steels from Magnetic Measurements
- Jiles, David C.
- Garikepati, P.
- Utrata, D.
- Thoelke, J. B.
Publication date
January 1989
DOI Publisher
Iowa State University Digital Repository Language
EnglishAbstract
The objective of this study was to determine how magnetic properties such as coercivity, hysteresis loss and initial susceptibility of AISI 4140 steels depended on the expended fatigue life. If one or more of these magnetic properties was found to be sensitive to fatigue cycling, then it should be possible to devise a magnetic NDE technique based on these results, for monitoring of in-service components subjected to fatigue cycling
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