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Influence of Various Parameters on the Determination of the Fatigue Crack Arrest Threshold

Amzallag, C
Research engineer and Head of Department of Mechanics,Creusot-Loire, Centre de Recherches,

Rabbe, P
Research engineer and Head of Department of Mechanics,Creusot-Loire, Centre de Recherches,

Bathias, C
Professor,Université de Technologie de Compiègne,

Benoit, D
Research engineer,Institut de Recherches de la Sidérurgie Française,

Truchon, M
Research engineer,Institut de Recherches de la Sidérurgie Française,

Pages: 16    Published: Jan 1981

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Source: STP738-EB

Abstract

This report presents the results of a round-robin work on the fatigue crack arrest threshold (ΔK^th) of 2618 aluminium alloy and AISI 316 steel. The main purpose was to develop a method for the determination of ΔK^th, and to examine the influence of various test parameters on this threshold. Among the parameters considered, only the load ratio (R) and the environment (vacuum) appear to have a significant influence on very slow fatigue crack growth rates (FCGR). Moreover, while the results obtained with the 316 steel show a great scatter, the importance of the adopted procedure is pointed out.

Keywords:
fatigue testing, fatigue crack growth, crack arrest threshold, test procedure

Paper ID: STP33450S
Committee/Subcommittee: E08.05
DOI: 10.1520/STP33450S
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