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Fatigue of an Al-Si gravity die casting alloy

Styles, C.M. and Reed, P.A.S. (2000) Fatigue of an Al-Si gravity die casting alloy In, Starke, Jr., E.A., Sanders, T.H. and Cassada, W.A. (eds.) Aluminium Alloys: Their Physical and Mechanical Properties. 7th International Conference ICAA7 Switzerland, Trans Tech pp. 1457-1462. (Materials Science Forum, 331-337).

Record type: Book Section


Fatigue crack initiation, short crack and long crack growth studies were performed on a high performance cast piston type alloy (Al-Si-Cu-Ni-Mg). Crack initiation was mainly associated with large blocky Si particles although a few cracks were initiated at clusters of FeNiAls intermetallics. Classical short crack growth was shown with crack arrest for up to 15000 fatigue cycles at second phase particles. Long crack growth showed no evidence of Stage I like facets near threshold or ductile striations in the mid Delta K region. A large number of fractured Si particles were, however, observed on the fracture sur faces and crack profiles the incidence of which increased with Delta K. The findings of this study suggest this alloy is brittle in nature with the Si particle content generally controlling fatigue crack initiation and growth.

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Published date: 2000
Additional Information: Series ISSN 0255-5476
Venue - Dates: 7th International Conference ICAA7, 2000-04-09 - 2000-04-14
Keywords: Al-Si alloy, fatigue crack initiation and growth, long crack growth, micromechanisms
Organisations: Engineering Mats & Surface Engineerg Gp


Local EPrints ID: 43071
ISBN: 0878498532
ISSN: 0255-5476
PURE UUID: 9fde3f52-2ffb-44c6-8181-d2f52d40b8ee
ORCID for P.A.S. Reed: ORCID iD

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Date deposited: 10 Jan 2007
Last modified: 17 Jul 2017 15:20

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Author: C.M. Styles
Author: P.A.S. Reed ORCID iD
Editor: E.A. Starke, Jr.
Editor: T.H. Sanders
Editor: W.A. Cassada

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