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通过对ZK31+x Y镁合金挤压态及固溶时效态的显微组织分析及力学性能研究,探讨了Y对ZK31+x Y镁合金组织和力学性能的影响。实验结果表明:Y的加入使得共晶相数量明显增加,挤压态强度随着Y的增加先增加后降低,当钇含量为0.5%时达到最大值332.4 MPa,延伸率先减小后增大,当钇含量为1.0%时,延伸率最小值11.1%;钇对时效硬度和力学性能影响不大;挤压态强度明显大于时效态,而时效态的延伸率明显大于挤压态。
The effect of Y on the microstructure and mechanical properties of ZK31 + xY magnesium alloy was investigated by analyzing the microstructure and the mechanical properties of ZK31 + xY magnesium alloy. The experimental results show that the addition of Y increases the amount of eutectic phase obviously, the strength of the extruded state first increases and then decreases with the increase of Y, reaches the maximum of 332.4 MPa when the content of yttrium is 0.5%, the elongation decreases first and then increases, When the yttrium content is 1.0%, the minimum elongation is 11.1%. Yttrium has little effect on the aging hardness and mechanical properties. The strength of the extruded state is obviously larger than the aging state, while the elongation of the aging state is obviously larger than the extrusion state.