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Microstructural analysis of fatigue initiation in Al-Si casting alloys

Record type: Conference or Workshop Item (Paper)

Fatigue initiation behaviour in three multi-component Al-Si casting alloys with varying Si content is compared using a range of microscopy and analytical techniques. A higher proportion of stiffer secondary phases leads to load transfer effects reducing particle cracking and particle/matrix debonding. Si appears stronger than the Al9FeNi phase, which cracks and debonds to form initiation sites preferentially over Si. Reducing Si content results in clusters of intermetallics forming, and increased porosity. The effect of porosity, combined with mesoscopic load transfer effects to the high volume fraction intermetallic regions make these potent crack initiation sites in low silicon alloys.

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Citation

Moffat, A.J., Mellor, B.G., Chen, C.L., Thomson, R.C. and Reed, P.A.S., (2006) Microstructural analysis of fatigue initiation in Al-Si casting alloys Poole, W.J., Wells, M.A. and Lloyd, D.J. (eds.) In Aluminium Alloys 2006: Innovation Through Research and Technology. Trans Tech., pp. 1083-1088.

More information

Published date: July 2006
Additional Information: Series ISSN 0255-5476
Venue - Dates: 10th International Conference on Aluminum Alloys, 2006-07-09 - 2006-07-13
Keywords: fatigue, piston, short crack, phase mapping
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 27812
URI: http://eprints.soton.ac.uk/id/eprint/27812
ISBN: 0878494081
PURE UUID: 3bd83a26-9e86-42c7-a510-0e2d8e5f1bdd
ORCID for P.A.S. Reed: ORCID iD orcid.org/0000-0002-2258-0347

Catalogue record

Date deposited: 10 Jan 2007
Last modified: 17 Jul 2017 16:03

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Contributors

Author: A.J. Moffat
Author: B.G. Mellor
Author: C.L. Chen
Author: R.C. Thomson
Author: P.A.S. Reed ORCID iD
Editor: W.J. Poole
Editor: M.A. Wells
Editor: D.J. Lloyd

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