Microstructural analysis of fatigue initiation in Al-Si casting alloys
Microstructural analysis of fatigue initiation in Al-Si casting alloys
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.
fatigue, piston, short crack, phase mapping
0878494081
1083-1088
Moffat, A.J.
152c31e0-5df4-4b0e-8db6-f8f5c43ae4b1
Mellor, B.G.
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Chen, C.L.
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Thomson, R.C.
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Reed, P.A.S.
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July 2006
Moffat, A.J.
152c31e0-5df4-4b0e-8db6-f8f5c43ae4b1
Mellor, B.G.
2b13b80f-880b-49ac-82fe-827a15dde2fe
Chen, C.L.
768e2bef-9640-45b2-a8c8-fbc139d8c140
Thomson, R.C.
8e9ac990-b234-488a-bc4d-1470a63ec93a
Reed, P.A.S.
8b79d87f-3288-4167-bcfc-c1de4b93ce17
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 Publications.
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
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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Published date: July 2006
Additional Information:
Series ISSN 0255-5476
Venue - Dates:
10th International Conference on Aluminum Alloys, Vancouver, Canada, 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
Catalogue record
Date deposited: 10 Jan 2007
Last modified: 16 Mar 2024 02:44
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Contributors
Author:
A.J. Moffat
Author:
B.G. Mellor
Author:
C.L. Chen
Author:
R.C. Thomson
Editor:
W.J. Poole
Editor:
M.A. Wells
Editor:
D.J. Lloyd
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