Abstract
The cracking of Si particles in an A357 Al alloy has been investigated over a spectrum of stress and strain by varying aging strength and applying different tensile strains. The variation of the fraction of broken Si particles with stress, strain, and cleavage plane orientation has been obtained. The features of cracking reveal that cracking of Si particles is a very localized event. A dislocation pileup mechanism is the most probable one among all crack-initiation theories for explaining the behavior. Based on this mechanism, further deduction has been made to obtain the relationship between the fraction of broken particles and metallurgical factors. The present data, along with Gurlandrss and that of Lowet al., have been found to verify this relationship for the effect of stress, strain, and cleavage plane orientation.
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Yeh, JW., Liu, WP. The cracking mechanism of silicon particles in an A357 aluminum alloy. Metall Mater Trans A 27, 3558–3568 (1996). https://doi.org/10.1007/BF02595447
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DOI: https://doi.org/10.1007/BF02595447