CAJ | 학술논문

研究了Be和Ca元素对Mg-9Al-0.5Zn合金显微组织和力学性能的影响。结果表明：在Mg-9Al-0.5Zn镁合金中添加0.1Be导致合金组织粗化和力学性能下降，同时在晶粒内部形成粒状γ相(Mg17Al12)。在此基础上添加Ca可以使合金组织细化，且含量越高，细化效果越明显。Mg-9Al-0.5Zn-0.1Be-0.5Ca合金具有较高的综合力学性能，但是进一步增加Ca含量导致合金常温力学性能下降。由于A12Ca相良好的高温强化作用，因此当Ca含量小于1％时，Mg-9Al-0.5Zn-0.1Be-XCa合金具有较高的高温强度，进一步增加Ca含量会增大合金脆性。
연구료Be화Ca원소대Mg-9Al-0.5Zn합금현미조직화역학성능적영향。결과표명：재Mg-9Al-0.5Zn미합금중첨가0.1Be도치합금조직조화화역학성능하강，동시재정립내부형성립상γ상(Mg17Al12)。재차기출상첨가Ca가이사합금조직세화，차함량월고，세화효과월명현。Mg-9Al-0.5Zn-0.1Be-0.5Ca합금구유교고적종합역학성능，단시진일보증가Ca함량도치합금상온역학성능하강。유우A12Ca상량호적고온강화작용，인차당Ca함량소우1％시，Mg-9Al-0.5Zn-0.1Be-XCa합금구유교고적고온강도，진일보증가Ca함량회증대합금취성。
Be and Ca were added to Mg-9Al-0. 5Zn alloy to study the microstructure and mechanical propertes. After the addition of 0. 1% Be in Mg-9Al-0. 5Zn alloy, the grain size increased, mechanical properties declined and some nodular γ phases formed within the grains. Ca was added to Mg-9Al-0. 5Zn-0. 1Be alloy to refine the grains and results indicated that the grain size was inversely proportional to Ca addition. Small addition of Ca could increase the mechanical propertes, but more Ca addition would decrease the mechanical propeties. Because of the excellent strengthening effect Al2Ca, less than lwt% Ca addition in Mg-9Al-0. 5Zn-0. 1Be-XCa increased the elevated temperature strength remarkably, but too much Ca addition would make the alloy brittle.