Abstract
Abstract In this study, the effect of solid solution temperature on microstructure and mechanical properties of the AA7075 alloy after T6 heat treatment was investigated. Following solid solution at five different temperatures for 2 hours, the AA7075 alloy was quenched and then artificially aged at 120∘C for 24 hours. Hardness measurements, microstructure examinations (SEM+EDS, XRD) and tensile tests were carried out for the alloys. The results showed that the increased solid solution temperature led to formation of precipitates in the microstructures and thus caused higher hardness and tensile strength.
Highlights
In this study, the effect of solid solution temperature on microstructure and mechanical properties of the AA7075 alloy after T6 heat treatment was investigated
The results showed that the increased solid solution temperature led to formation of precipitates in the microstructures and caused higher hardness and tensile strength
This study aims to investigate changes in the microstructure and mechanical properties of the AA7075 alloy solution treated at five different solid solution temperatures after T6 heat treatment
Summary
The effect of solid solution temperature on microstructure and mechanical properties of the AA7075 alloy after T6 heat treatment was investigated. The strength of 7xxx series alloys can be improved significantly using different heat treatment processes (re-aging [RRA]) and high temperature pre-precipitation (HTPP) [4,5,6,7,8,9,10,11,12]. The second phase (MgZn2) precipitates are formed in the structure by applying aging heat treatment at certain temperatures for certain durations. These precipitates formed in the structure by aging depend on the degree to which uncontrolled phases that form in the structure during hardening dissolve For this reason, this study aims to investigate changes in the microstructure and mechanical properties of the AA7075 alloy solution treated at five different solid solution temperatures after T6 heat treatment
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