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通过光学显微镜(OM)、X射线衍射仪(XRD)、扫描电镜(SEM)、力学性能、静态腐蚀速率和极化曲线等测试方法,研究了合金化元素Sb对AM50+Y合金组织与性能的影响,并分析了其作用机理。结果表明,Sb元素的添加可以有效细化AM50+Y合金的晶粒;添加1%Sb的4#合金主要由α-Mg固溶体、β-Mg_(17)Al_(12)、Al_2Y和YSb相组成;当AM50+Y合金中Sb添加量为0.6%时可以取得最佳的常温和150℃高温强度和塑性结合。此外,Sb元素可以有效提高合金的冲击韧性和硬度;AM50+Y合金中添加Sb元素,合金的静态腐蚀速率增加,合金的腐蚀电流密度增加,耐腐蚀性能有所降低。
The effects of alloying elements Sb on the microstructure and properties of AM50 + Y alloys were studied by means of OM, XRD, SEM, mechanical properties, static corrosion rate and polarization curves. Influence, and analyzed its mechanism of action. The results show that the addition of Sb can refine the grains of AM50 + Y alloy effectively. The alloy containing 1% Sb consists mainly of α-Mg solid solution, β-Mg 17 Al 12, Al 2 Y and YSb phases When the amount of Sb in AM50 + Y alloy is 0.6%, the best combination of high temperature strength and plasticity at room temperature and 150 ℃ can be obtained. In addition, the Sb element can effectively improve the impact toughness and hardness of the alloy; the addition of Sb element in the AM50 + Y alloy increases the static corrosion rate of the alloy, the corrosion current density of the alloy increases, and the corrosion resistance decreases.