Microstructural influences on fatigue crack initiation and early growth behaviour in plain bearing Al-based linings


Joyce, M.R., Syngellakis, S. and Reed, P.A.S., (2000) Microstructural influences on fatigue crack initiation and early growth behaviour in plain bearing Al-based linings Starke, Jr., E.A., Sanders, Jr., T.H. and Cassada, W.A. (eds.) In Aluminium Alloys: Their Physical and Mechanical Properties. vol. 331-337, Trans Tech., pp. 1445-1450.

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Description/Abstract

Fatigue initiation and subsequent short and long crack growth has been investigated in an typical automotive bearing system, focussing on the behaviour of the aluminium-tin-silicon lining material. Crack initiation appears to be associated with decohesion of the interface between the primary, globular silicon and the aluminium matrix. Short crack growth, and crack growth at low Delta K levels in the long crack case, appears to be tortuous and highly microstructurally dependent, deviating towards secondary phase/matrix interfaces. At higher Delta K levels crack growth occurs principally through the aluminium matrix, and classical striations are seen. Multiple crack initiation is seen in the multiphase bearing lining material and crack coalescence gives rise to the dominant crack. Uncoalesced cracks appear to arrest at a "critical" surface crack length, whose dimension has been linked to sub-surface crack deflection within the lining material once the crack reaches the steel backing.

Item Type: Conference or Workshop Item (Paper)
Additional Information: Series ISSN 0255-5476
ISBNs: 0878498532 (print)
ISSNs: 0255-5476 (print)
Venue - Dates: 7th International Conference ICAA7, 2000-04-09 - 2000-04-14
Related URLs:
Keywords: Al-bearing alloys, fatigue
Subjects:
Organisations: Engineering Mats & Surface Engineerg Gp
ePrint ID: 43069
Date :
Date Event
2000Published
Date Deposited: 10 Jan 2007
Last Modified: 16 Apr 2017 18:50
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/43069

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