EFFECT OF Î³-IRRADIATION ON THE MECHANICAL PROPERTIES OF ALâCU ALLOY
MAGED S. SOBHY
SEM observations and Vickers hardness tests were performed to identify the irradiation effects. Î³-irradiation effect during the aging hardening process can be explained depending on the composition of the alloy and is used to derive quantitative information on the kinetics of the transformation precipitates. Increasing the Cu content of an AlâCu alloy can improve the aging hardness. The present results of the hardness behavior, with SEM observations of surveillance specimens at different doses, suggest that the radiation-induced defects are probably complex valence-solute clusters. These clusters act as nuclei for the precipitation of Î¸-Al2Cu type. This can be effectively utilized to study the systematics of nucleation of precipitates at vacancy-type defects. Î³-irradiation probably plays the key role in defects responsible for material strengthening and embrittlement.
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