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 Gregson, P.J. and Harris, S. (eds.) In Aluminium Alloys 2002: Their Physical and Mechanical Properties. Trans Tech., pp. 1261-1266.

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Description/Abstract

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: Conference or Workshop Item (Paper)
Additional Information: Series ISSN 0255-5476
ISBNs: 0878498990 (print)
ISSNs: 0255-5476 (print)
Venue - Dates: 8th International Conference ICAA8, 2002-07-02 - 2002-07-05
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Keywords: long fatigue crack growth, micro-mechanisms, Al-Si alloy, high temperature
Subjects:
Organisations: Engineering Mats & Surface Engineerg Gp
ePrint ID: 43073
Date :
Date Event
2002Published
Date Deposited: 10 Jan 2007
Last Modified: 16 Apr 2017 18:50
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/43073

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