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Influence of Heat Treatment Process on Microstructure and Mechanical Properties of 7075 Aluminum Alloy

Ying Lü

Abstract

The double-grade aging heat-treatment process after solution treatment was researched and the influences of double-grade aging heat treatment process on the microstructure and hardness of 7075 aluminum alloy were analyzed.The results show that the optimal mechanical properties can be obtained when its first-grade aging treatment and second-grade ageing treatment is at(115±5)℃×6h and 170℃×(14～16)h respectively,which can provide an evidence for the identification and optimization of parameters of aging heat-treatment process for 7075 alloy.

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Key concepts: Alloy, Microstructure, Materials science, Aluminium, Metallurgy, Alonizing, Ageing, Process (computing)