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Open AccessReview

Creep-Fatigue Failure Diagnosis

EMPA: Swiss Federal Laboratories for Materials Science and Technology Überlandstrasse 129, Dübendorf CH-8600, Switzerland
Academic Editor: Robert Lancaster
Materials 2015, 8(11), 7757-7769; https://doi.org/10.3390/ma8115418
Received: 22 October 2015 / Revised: 4 November 2015 / Accepted: 6 November 2015 / Published: 16 November 2015
(This article belongs to the Special Issue Failure Analysis in Materials)
Failure diagnosis invariably involves consideration of both associated material condition and the results of a mechanical analysis of prior operating history. This Review focuses on these aspects with particular reference to creep-fatigue failure diagnosis. Creep-fatigue cracking can be due to a spectrum of loading conditions ranging from pure cyclic to mainly steady loading with infrequent off-load transients. These require a range of mechanical analysis approaches, a number of which are reviewed. The microstructural information revealing material condition can vary with alloy class. In practice, the detail of the consequent cracking mechanism(s) can be camouflaged by oxidation at high temperatures, although the presence of oxide on fracture surfaces can be used to date events leading to failure. Routine laboratory specimen post-test examination is strongly recommended to characterise the detail of deformation and damage accumulation under known and well-controlled loading conditions to improve the effectiveness and efficiency of failure diagnosis. View Full-Text
Keywords: failure diagnosis; creep-fatigue; material condition; mechanical analysis failure diagnosis; creep-fatigue; material condition; mechanical analysis
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Holdsworth, S. Creep-Fatigue Failure Diagnosis. Materials 2015, 8, 7757-7769.

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