Abstract
The accumulation of cavitation damage in an aluminum-silicon eutectic alloy (Al-13%Si) during superplastic flow has been examined as a function of strain, strain-rate and temperature. Both cavitation damage and the microstructural changes occurring during deformation have been assessed. The role of grain size and its stability in affecting the level of cavitation damage has been identified. It has been found that the percentage cavitation is primarily controlled by the level of strain and at increasing grain-size results in continuous cavity nucleation. Similar evidence has also been obtained from fracture surfaces.
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