Influence of Microstructure and Defect Population on the Fatigue Performance of Cast A356-T6 Automotive Components

Abstract:

In the paper fatigue specimens are extracted from different regions of cast aluminum cylinder heads produced by two foundries. A high strength region and a low strength region were identified within the cylinder head and the A356-T6 material locally characterized in terms of microstructure and defect population. High cycle fatigue testing according to a reduced staircase method was performed to determine the local fatigue strength at 10⁷ cycles in the cylinder heads of the two foundries. The implications of the experimental observations are discussed.

• Periodical: Materials Science Forum (Volume 782)
• Pages: 301-305
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.782.301
• Online since: April 2014
• Authors: Radomila Konečná, Gianni Nicoletto, Enrica Riva
• Keywords: A356 Aluminum Alloy, Defect, Engine Casting, Fatigue Strength, Microstructure, SDAS

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