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研究了热处理对Mg-0.8Zn-0.15Y-0.6Zr合金微观组织、力学性能及阻尼性能的影响。结果表明:合金铸态及热处理态的微观组织均由α-Mg和(Mg3YZn6)相组成,(Mg3YZn6)相在热处理过程中表现出良好的热稳定性;热处理温度为400℃时,组织中有富Zr的α-Mg新相析出。与铸态相比,合金热处理后的抗拉强度最大提高了15.2%,伸长率最大提高了10.4%。随着热处理温度的升高,合金应变振幅无关阻尼性能逐渐降低。
The effects of heat treatment on the microstructure, mechanical properties and damping properties of Mg-0.8Zn-0.15Y-0.6Zr alloy were studied. The results show that the microstructures of as-cast and heat-treated alloys are composed of α-Mg and (Mg3YZn6) phases, and (Mg3YZn6) phase shows good thermal stability during the heat treatment. When the heat treatment temperature is 400 ℃, Zr-rich α-Mg precipitates. Compared with as-cast, the tensile strength of the alloy after heat treatment increased by 15.2% at the maximum, the maximum elongation increased by 10.4%. With the increase of the heat treatment temperature, the damping property of alloy strain amplitude is gradually decreased.