Microstructure and Mechanical Properties of a Heat -Treatable Al-Sb and Al-Sb-In Alloys by Melt-Spun Technique

The aluminum alloy Al80-Sb20 and Al70-Sb20-In10 microstructure and mechanical properties are studied in Melt Spun condition after heat treatment. The elevated temperatures strength properties improved as compared to the AlSb base alloy with a reduction in stiffness. The maximum strength properties are obtained with heat treatment time rates 60 and 90 min; an additional rate causes a decrease in strength due to increased volume of coarse needle AlSb IMC precipitates. The resultant structural variations increase the creep rate (ɛ). Elastic modulus reduction might be due to high elastic lattice distortions after the thermal process, while the stress exponent refers to the dislocation climb mechanism of deformation after heat treatment.