Prediction of fatigue crack formation in 304 stainless steel

Journal Article · Wed May 01 04:00:00 EDT 1996 · Metallurgical Transactions, A

DOI:https://doi.org/10.1007/BF02649863· OSTI ID:260344

McGuire, S M; Fine, M E ^[1]

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1. Northwestern Univ., Evanston, IL (United States). Materials Science and Engineering Dept.

Strain-controlled fatigue tests have been conducted on center-holed 304 stainless steel specimens. The fraction of total fatigue life spent until formation of an engineering crack ranged from about 15 to 85 pct, indicating the potential importance of being able to predict the fatigue crack formation life. A just formed engineering crack, as defined here, is a through crack long in the thickness direction, which has just emerged from the center hole. An energy based parameter, {Delta}{sigma}{Delta}{epsilon}{sub t}, has been shown to correlate with the appearance of fatigue cracks in the center-holed 304 stainless steel specimens. This parameter is suggested to be more useful in predicting fatigue crack formation life than {Delta}{sigma} or {Delta}{epsilon}{sub t} alone. A good correlation was found over the limited range of data for two types of 304 stainless steel, a powder metallurgy (PM) stainless steel with higher than normal strength properties and an ingot metallurgy (IM) stainless steel with normal strength properties. A better correlation was found for strain-controlled fatigue tests which did not go into compressive strain than for completely reversed fatigue.

• Sponsoring Organization: USDOE
• OSTI ID: 260344
• Journal Information: Metallurgical Transactions, A, Journal Name: Metallurgical Transactions, A Journal Issue: 5 Vol. 27; ISSN 0360-2133; ISSN MTTABN
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CASTING
CORRELATIONS
CRACK PROPAGATION
CRACKS
FATIGUE
MECHANICAL PROPERTIES
POWDER METALLURGY
PREDICTION EQUATIONS
SAMPLE PREPARATION
STAINLESS STEEL-304
STRAINS
STRESSES
TIME DEPENDENCE