Influence of Cooling Rate on Fatigue Behaviour of Eutectic Al-Si (A413) Alloy Casting

Abstract:

In this research work, the effect of cooling rate on fatigue behaviour of eutectic A413 Al-Si cast alloy is investigated. Castings produced by two different cooling rates, water-cooled and air-cooled are studied. The structural morphology of alloy castings was characterized using Inverted Trinocular Metallurgical Optical Microscopy. A Comprehensive tension–tension fatigue test was carried out with a stress ratio of R=0.5, and a sinusoidal waveform under three different mean stress conditions (25%, 50% & 75% of UTS) at room temperature (32°C). The microstructural evaluations show that the eutectic script size is smaller for water-cooled casting than the air-cooled casting. It is also observed that the fatigue life of the water-cooled cast alloy is greater than that of cast alloy produced with conventional air-cooled method.

• Periodical: Applied Mechanics and Materials (Volume 787)
• Pages: 490-494
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.787.490
• Online since: August 2015
• Authors: M. Mohandass*, Jamuna Venkatesan, N. Nallusamy
• Keywords: Air-Cooled, Al-Si Alloy Casting, Cooling Rate, Eutectic Silicon Script, Fatigue Life, Local Solidification Time, Mean Stress, S-N Curves, Stress Ratio, Water-Cooled Castings

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