固溶压力对AM60合金组织性能的影响
岳学庆
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作者单位：秦皇岛职业技术学院 机电系
中文关键字：镁合金；高压固溶；常压时效；压缩性能
英文关键字：Magnesium alloy; high-pressure solution; atmospheric–pressure aging; compressive property
中文摘要： 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，190 ℃时效处理9 h。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。随着固溶压力的提高，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。
英文摘要： As-cast AM60 magnesium alloy was solid dissolved under different pressures (atmospheric-pressure, 2, 4 and 6 Gpa) and subsequently aged for 9 h at 190 ℃ under atmospheric-pressure. The microstructure of the products was characterized by optical microscope and X-ray diffraction, and the compressive properties of the products were investigated by hot-stimulation machine Gleeble-3500. The results show that, compared with atmospheric-pressure solution, high-pressure solution causes that the α-Mg grains of aging alloy are more fine and uniform. With increasing the solution pressure gradually, the compressive strength of aging alloy increases up to 4 Gpa and then decreases, while maximum plastic strain decreases up to 4 Gpa and then increases.