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对铸态AM60镁合金在不同压力(常压、2、4和6 GPa)下固溶并随后在常压下进行190℃×9 h时效处理。采用金相显微镜和X射线衍射表征了产物的显微组织,并使用Gleeble-3500热模拟机研究了产物的压缩力学性能。结果表明,相比常压固溶,固溶时施加压力使时效处理合金的α-Mg晶粒显著减小,尺寸更加均匀。随固溶压力的提高,时效处理合金的抗压强度逐渐升高直到4 GPa,随后下降,同时最大塑性应变逐渐降低直到4 GPa,随后上升。
The as-cast AM60 magnesium alloy was solutionized at different pressures (atmospheric pressure, 2, 4 and 6 GPa) and then aged at 190 ° C for 9 h at atmospheric pressure. The microstructure of the product was characterized by optical microscopy and X-ray diffraction. The compressive mechanical properties of the product were investigated by Gleeble-3500 thermal simulator. The results show that the α-Mg grains of the aging treatment alloy are significantly reduced and the size is more uniform than the solution treated under normal pressure. With the increase of solid solution pressure, the compressive strength of the aging treatment alloy gradually increases until 4 GPa, then decreases, while the maximum plastic strain decreases gradually until 4 GPa, then increases.