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对挤压态Mg-0.5Er合金进行了退火处理,研究了退火温度和退火时间对合金显微组织、拉伸和压缩力学性能的影响。结果表明,挤压态Mg-0.5Er合金由细小的动态再结晶晶粒和部分未完全结晶的晶粒组成;退火处理后合金发生了明显的静态再结晶,形成了均匀细小的再结晶晶粒;在同一退火温度下,保温时间越长则平均晶粒尺寸越大,退火温度对晶粒尺寸的影响相对退火保温时间更为敏感;在同样的退火工艺下,Mg-0.5Er合金的抗压强度比抗拉强度高。
The as-extruded Mg-0.5Er alloy was annealed and the effect of annealing temperature and annealing time on the microstructure, tensile and compressive mechanical properties of the alloy was studied. The results show that the as-extruded Mg-0.5Er alloy consists of fine dynamic recrystallized grains and partially incompletely-crystallized grains. The annealed alloys undergo significant static recrystallization to form uniform and fine recrystallized grains At the same annealing temperature, the longer the holding time, the larger the average grain size. The effect of annealing temperature on the grain size is more sensitive to the annealing time. In the same annealing process, the compressive strength of Mg-0.5Er alloy Strength is higher than tensile strength.