Elevated temperature fatigue of Al-Si piston alloys

Joyce, M.R., Styles, C.M. and Reed, P.A.S. (2002) Elevated temperature fatigue of Al-Si piston alloys. In, Gregson, P.J. and Harris, S. (eds.) Aluminium Alloys 2002: Their Physical and Mechanical Properties. 8th International Conference ICAA8 Switzerland, Trans Tech, 1261-1266. (Materials Science Forum 396-402).


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Long crack fatigue tests were carried out on two cast Al-Si alloys used in the manufacture of pistons for small automotive engines. These were performed at a frequency of 15Hz at room temperature, 200 degreesC and 350 degreesC, in addition further tests were performed at 50Hz at the highest temperature. The fatigue performance of both alloys was found to improve with increasing temperature. This was linked to a change in fatigue crack propagation mechanism in both alloys with respect to the primary Si phase. It was seen that the transition between a given Si phase decohering or fracturing ahead of a fatigue crack occurred at a temperature and strain rate dependent critical stress intensity factor. The relation between critical stress intensity factor, temperature and strain rate differentiated the two materials studied.

Item Type: Book Section
Additional Information: Series ISSN 0255-5476
ISBNs: 0878498990 (hardback)
ISSNs: 0255-5476 (print)
Related URLs:
Keywords: long fatigue crack growth, micro-mechanisms, Al-Si alloy, high temperature
Subjects: T Technology > TN Mining engineering. Metallurgy
T Technology > TL Motor vehicles. Aeronautics. Astronautics
Divisions : University Structure - Pre August 2011 > School of Engineering Sciences > Engineering Materials & Surface Engineering
ePrint ID: 43073
Accepted Date and Publication Date:
Date Deposited: 10 Jan 2007
Last Modified: 31 Mar 2016 12:16
URI: http://eprints.soton.ac.uk/id/eprint/43073

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