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通过XRD、OM、SEM和EDS研究I相和W相对LZ83-x Y镁合金显微组织和力学性能的影响。结果表明:LZ83-x Y合金中I相和W相的含量变化与Zn/Y质量比有关。I/α-Mg共晶包的结合力可以增强铸态LZ83-0.5Y和LZ83-1.0Y合金的强度,同时W相对LZ83-1.5Y镁合金没有明显的强化效果。在挤压态合金中,I相和W相被挤压成纳米颗粒弥散在β-Li基体中。由于W相的体积分数较高,其弥散强化效果更为明显。挤压态LZ83-1.5Y镁合金的极限抗拉强度达到238 MPa,伸长率为20%。
The effects of I phase and W phase on the microstructure and mechanical properties of LZ83-xY magnesium alloy were studied by XRD, OM, SEM and EDS. The results show that the content of I phase and W phase in LZ83-x Y alloy is related to the mass ratio of Zn / Y. The bonding strength of the I / α-Mg eutectic coating can enhance the strength of the as-cast LZ83-0.5Y and LZ83-1.0Y alloys, while W has no significant strengthening effect on the LZ83-1.5Y magnesium alloy. In extruded alloys, I and W phases are extruded into nanoparticles dispersed in the β-Li matrix. Due to the higher volume fraction of W phase, the dispersion strengthening effect is more obvious. Extruded LZ83-1.5Y magnesium alloy ultimate tensile strength of 238 MPa, elongation of 20%.