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不同Y含量的固溶态Mg-Zn-Mn合金的显微组织与力学性能
Microstructure and mechanical properties of Mg-Zn-Mn alloys with different Y contents after solution treatment
【摘要】 研究了固溶态Mg-1.5Zn-0.3Mn-xY(x=0、1.0、2.0、2.5、3.0和4.0 mass%)合金的显微组织及力学性能。结果表明:当Y含量为0~4.0 mass%时,随着Y含量增加,合金的平均晶粒尺寸由(258.0±6.1)μm减小至(114.1±3.9)μm;当Y含量为1.0~3.0 mass%时,合金基体中弥散分布着微米级的Mg3Y2Zn3相与Mg24Y5相颗粒,当Y含量为4.0 mass%时,合金基体中出现尺寸大于5μm的鱼骨状Mg24Y5相颗粒;当Y含量为3.0 mass%时,在固溶强化、细晶强化以及第二相强化的共同作用下,合金表现出最佳的力学性能,其抗拉强度、屈服强度以及伸长率分别为(223.2±6.6) MPa、(170.3±5.1) MPa以及(12.6±0.3)%。
【Abstract】 Microstructure and mechanical properties of solution treated Mg-1.5Zn-0.3Mn-xY(x=0, 1.0, 2.0, 2.5, 3.0 and 4.0 mass%) alloys were studied. The results show that when the Y content is 0-4.0 mass%, the average grain size of the alloy decreases from(258.0±6.1) μm to(114.1±3.9) μm with the increase of Y content. When the content of Y is 1.0-3.0 mass%, micron-sized Mg3Y2Zn3 and Mg24Y5 phase particles are dispersed in the alloy matrix. When the content of Y is 4.0 mass%, fishbone like Mg24Y5 phase particles with a size larger than 5 μm appear in the alloy matrix. When the Y content is 3.0 mass%, the alloy shows the best mechanical properties under the combined effects of solution strengthening, fine grain strengthening and second phase strengthening, and its tensile strength, yield strength and elongation are(223.2±6.6) MPa,(170.3±5.1) MPa and(12.6±0.3)% respectively.
【Key words】 magnesium alloy; solution treatment; rare earth element; mechanical property;
- 【文献出处】 材料热处理学报 ,Transactions of Materials and Heat Treatment , 编辑部邮箱 ,2026年04期
- 【分类号】TG146.22
- 【下载频次】55