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研究了不同输出功率(0~900 W)和作用时间(0~120s)的超声波对长周期结构增强Mg97Y2Cu1合金凝固组织和力学性能的影响。结果表明,经超声熔体处理后,合金的凝固组织及力学性能均得到了改善,其第二相由连续网络状变为均匀弥散状;随着功率或处理时间的增加,合金的初生晶粒先细化后粗化,转折点分别为700 W和60s。当功率为700 W,处理时间为60s时,合金的综合性能最好,其抗拉强度和伸长率分别为198 MPa和15.4%,较常规铸造条件分别提高了23.8%和105%。
The effects of ultrasonic waves with different output powers (0 ~ 900 W) and action time (0 ~ 120 s) on the solidification microstructure and mechanical properties of Mg97Y2Cu1 alloy reinforced with long periodical structure were studied. The results show that the solidification microstructure and mechanical properties of the alloy have been improved after ultrasonic melt treatment, and the second phase changes from continuous network to uniform dispersion. With the increase of power or treatment time, the primary crystal grains After the first refinement of coarsening, the turning point was 700 W and 60s. When the power is 700 W and the treatment time is 60s, the alloy has the best overall performance. The tensile strength and elongation of the alloy are 198 MPa and 15.4% respectively, which are 23.8% and 105% higher than the conventional casting conditions respectively.