By means of annular channel angular extrusion technology and solution treatment, the AZ80 supersaturated solid solution was prepared. The β-Mg₁₇Al₁₂ precipitate morphologies analysis along with its sizes and area fraction measurement was performed to investigate mechanical properties variation of alloy at various aging temperature. The results indicated that after solution treatment, the intergranular precipitate of as-extruded alloy was re-dissolved into the matrix, effectively decreasing the stress concentration, which was beneficial to the enhancement of elongation. At aging temperatures of 300 °C, Widmanstatten structure, lath-shaped precipitate, and intergranular precipitate were observed, while at 175–200 °C, cellular structure and oval-shaped particle were also identified. The morphology, area fraction, size of the precipitates, and PFZs (precipitate free zones) width worked together to affect the age-hardening behavior of the alloy. The strength and hardness of the peak-aged samples decreased with the increase in aging temperature, which is primarily attributed to the reduction in cellular structure area fraction and the corresponding increase in the interlamellar spacing, and the coarsening of the rhombus precipitate.

通过环形通道角挤压技术和固溶处理，制备了AZ80过饱和固溶体。的β -Mg ₁₇的Al ₁₂进行了析出物形态分析及其尺寸和面积分数测量，以研究在不同时效温度下合金的力学性能变化。结果表明，固溶处理后，挤压态合金的晶间沉淀重新溶解在基体中，有效降低了应力集中，有利于伸长率的提高。在300°C的时效温度下，观察到Widmanstatten结构，板条状沉淀物和粒间沉淀物，而在175–200°C的温度下，也鉴定出细胞结构和椭圆形颗粒。形态，面积分数，析出物的大小和PFZs（析出自由区）的宽度共同影响了合金的时效硬化行为。