Impact toughness in Al–12Si and Al–12Si–3Cu cast alloys—Part 1: Effect of process variables and microstructure |
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Authors: | KG Basavakumar PG MukundaM Chakraborty |
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Affiliation: | Department of Metallurgical and Materials Engineering, Indian Institute of Technology, Kharagpur 721302, India |
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Abstract: | The charpy impact energy of Al–12Si and Al–12Si–3Cu cast alloys was measured in terms of the total absorbed energy. The standard charpy specimens 10×10×55 mm with a 2 mm V-notch were prepared from the castings. Effect of process variables and microstructural changes on the impact toughness of Al–12Si and Al–12Si–3Cu cast alloys was investigated. The results indicate that combined grain refined and modified Al–12Si–3Cu cast alloys have microstructures consisting of uniformly distributed α-Al dendrites, eutectic Al–Si and fine CuAl2 particles in the interdendritic region. These alloys exhibited better impact toughness in the cast condition compared with the same alloy subjected to only grain refinement or modification. |
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Keywords: | Impact toughness Grain refinement: Modification Eutectic Al&ndash Si cast alloys |
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