【摘要】 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。更多还原

【Abstract】 Effects of yttrium on microstructure and mechanical properties of extruded,solution- treated and as- aged ZK31 + x Y magnesium alloy were studied through SEM observation and EDS analysis. The results show that addition of yttrium leads to a significant increase in eutectic phase volume of the alloy. With increasing of yttrium addition,the extruding strength of the alloy increases and then decreases and reaches to the maximum 332. 4 MPa when yttrium addition is 0. 5%,and the elongation decreases and then increases and reaches to the minimum value of 11. 1% when yttrium addition is 1. 0%. Yttrium has slight effects on aging hardness and mechanical properties of the alloy. The strength of the extruded alloy is higher than that of as- aged one,and the elongation of as- aged alloy is higher than that of extruded alloy.更多还原