CAJ | 학술논문

对 Mg-6Zn-0．5Y 合金熔体进行功率分别为0,300,600,900 W 连续超声处理.通过金相显微镜、X 射线衍射仪、扫描电镜等分析手段研究了超声处理功率对其显微组织及力学性能的影响.结果表明,经600 W 超声处理的 Mg-6Zn-0．5Y 合金组织细化效果最好,初生α-Mg 相由粗大的树枝晶变为细小的球状等轴晶,准晶 I 相由粗大的半连续网状分布变成断续的细线状分布.此外,力学性能分析显示,当超声处理功率为600 W 时,Mg-6Zn-0．5Y 合金的抗拉强度和伸长率均达到最大值,比未处理时分别提高了67％和56％.
대 Mg-6Zn-0．5Y 합금용체진행공솔분별위0,300,600,900 W 련속초성처리.통과금상현미경、X 사선연사의、소묘전경등분석수단연구료초성처리공솔대기현미조직급역학성능적영향.결과표명,경600 W 초성처리적 Mg-6Zn-0．5Y 합금조직세화효과최호,초생α-Mg 상유조대적수지정변위세소적구상등축정,준정 I 상유조대적반련속망상분포변성단속적세선상분포.차외,역학성능분석현시,당초성처리공솔위600 W 시,Mg-6Zn-0．5Y 합금적항랍강도화신장솔균체도최대치,비미처리시분별제고료67％화56％.
Continuous ultrasonic treatment was introduced into the solidification of the Mg-6Zn-0.5Y magnesium alloy with the power of 0,300,600,900 W,respectively.The effect of ultrasonic power on microstructure and mechanical properties of Mg-6Zn-0.5Y magnesium alloy were investigated through micrograph,X-ray diffrac-tion analysis (XRD)and scanning electron microscope (SEM).The results showed that with the application of 600 W ultrasonic treatment,the primary α-Mg phases were transformed from coarse dendrites to fine equiaxed grains,and the semicontinuous quasicrystalline phases at α-Mg boundaries were modified into discontinuous. Besides,the Mg-6Zn-0.5Y magnesium alloy prepared with 600 W ultrasonic treatment exhibited the best ulti-mate tensile strength and elongation.Compared to the untreated alloy,the ultimate tensile strength and elonga-tion are improved by 67%,56%,respectively.