Performance of Thermo-Mechanically Processed AA7075 Alloy at Elevated Temperatures—From Microstructure to Mechanical Properties

This data focuses on the high temperature characteristics of thermo-mechanically processed AA7075 alloy. An integrated die forming process that combines solution heat treatment and hot forming at different temperatures was employed to process the AA7075 alloy. Low die temperature resulted in the fabrication of parts with higher strength, similar to that of T6 condition, while forming this alloy in the hot die led to the fabrication of more ductile parts. Isothermal uniaxial tensile tests in the temperature range of 200–400 °C and at strain rates ranging from 0.001–0.1 s−1 were performed on the as-received material, and on both the solution heat-treated and the thermo-mechanically processed parts to explore the impacts of deformation parameters on the mechanical behavior at elevated temperatures. Flow stress levels of AA7075 alloy in all processing states were shown to be strongly temperature- and strain-rate dependent. Results imply that thermo-mechanical parameters are very influential on the mechanical properties of the AA7075 alloy formed at elevated temperatures.

本数据集聚焦热机械加工态AA7075铝合金的高温性能特征。研究采用结合固溶热处理与变温热成形的集成模具成形工艺对AA7075铝合金进行加工。较低的模具温度可制备出强度接近T6态的高强度构件，而热模具成形工艺则可获得延展性更优异的构件。为探究变形参数对高温下力学行为的影响，本研究对原始供货态材料、固溶热处理态以及热机械加工态试样，开展了温度区间为200~400℃、应变速率范围为0.001~0.1 s⁻¹的等温单轴拉伸试验。结果表明，所有加工状态下AA7075铝合金的流动应力（flow stress）水平均与温度和应变速率呈强相关性。研究结果显示，热机械加工参数对高温成形AA7075铝合金的力学性能具有显著影响。