Journal
ADVANCES IN SUPERALLOYS, PTS 1 AND 2
Volume 146-147, Issue -, Pages 646-649Publisher
TRANS TECH PUBLICATIONS LTD
DOI: 10.4028/www.scientific.net/AMR.146-147.646
Keywords
Fatigue crack propagation properties; small specimen test technique; crack closure; thickness effect; stress state; miniature specimens
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There are situations where baseline fatigue crack propagation (FCP) data are needed but the available material for its evaluation is far from enough to fabricate full sized standard specimens. Miniature specimen testing techniques have been proposed but published data seems to be slightly but consistently slower under the same stress intensity than that from standard specimen results. In this work, an aluminum alloy and a steel, which have vastly different mechanical behaviors, are used to generate different stress states and premature crack closure to allow the validity of miniature specimen FCP data to be critically examined.
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