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对固溶态的Mg-6Gd-1Y-0.5Zr合金进行低温形变热处理,处理工艺包括不同应变量的冷拉伸和随后在200°C进行的峰值时效。结果表明:低温形变热处理合金的时效硬化动力学显著加速,随变形量增大,合金的峰值时效时间大幅度缩短。冷拉伸变形量为10%的合金在200°C峰值时效后的屈服强度、抗拉强度和伸长率分别达到251MPa、296MPa和8%,这些性能大大超过传统商业牌号的耐热镁合金WE54,尽管其总的稀土含量高于GW61K合金。
Low-temperature deformation heat treatment of the solid solution Mg-6Gd-1Y-0.5Zr alloy was carried out by cold stretching with different strain amounts and subsequent peak aging at 200 ° C. The results show that the aging hardening kinetics of the low temperature deformation heat treatment alloy is accelerated significantly. With the increase of deformation, the peak aging time of the alloy is greatly shortened. Cold tensile deformation of 10% of the alloy at 200 ° C peak aging yield strength, tensile strength and elongation reached 251MPa, 296MPa and 8%, these properties greatly exceed the traditional commercial grade heat-resistant magnesium alloy WE54, Despite its higher total rare earth content than GW61K alloy.