Sarkar, Bijit Kumar (1995) Fatigue of brittle materials - A critical appraisal. Bulletin of Materials Science, 18 (6). pp. 755-772. ISSN 0250-4707

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Abstract

Recent demands for high performance ceramics and glass for various applications from bioceramics to cutting tools under fluctuating stress conditions has focussed attention of the scientific community towards fatigue behaviour of brittle solids. Attention to fatigue phenomena in alumina ceramics phenomenological to metals, having an endurance dependent on applied stress with a limit at around 50% of the single cycle fracture stress, was first drawn by the author in late sixties. Slip assisted fatigue process was not considered to be dominant in ceramic materials due to the absence of appreciable crack tip plasticity. With the background of this general survey of fatigue behaviour some fatigue studies based on mode of testing, theoretical and experimental analyses and fractographic evidence have been presented. Studies have shown that there is a dormant period between each successive crack advancement during which the residual stress and a plastic component is built up in a cumulative manner leading to eventual failure. During fatigue sigma(p), (plastic) and sigma(r), (residual stress) components are predominant for ductile metals and brittle glass/ceramics respectively. It is also apparent that dislocation assisted plastic component as a contributing factor in the failure of brittle materials under fatigue cannot be ruled out.

Item Type: Article
Additional Information: 6th Annual General Meeting of the Materials-Research-Society-of-India, INDIAN INST TECHNOL, KHARAGPUR, INDIA, FEB 07-09, 1995
Subjects: Engineering Materials
Divisions: Director´┐Żs Secretariat
Depositing User: Bidhan Chaudhuri
Date Deposited: 21 Aug 2012 07:34
Last Modified: 05 Mar 2016 15:51
URI: http://cgcri.csircentral.net/id/eprint/1739

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