有色金属材料与工程2025，Vol.46Issue(3)：53-62,10.DOI:10.13258/j.cnki.nmme.20250120001
TIG电弧增材制造Mg-6Gd-1Y-0.2Zr合金的微观组织及力学性能研究
Microstructures and mechanical properties of Mg-6Gd-1Y-0.2Zr alloy manufactured by TIG wire-arc additive manufacturing
摘要
Abstract
Large-scale magnesium alloy components fabricated via wire-arc additive manufacturing(WAAM)hold promising application prospects in aerospace,transportation,and electronic communication sectors.However,current research on WAAM magnesium alloys produced by tungsten inert gas(TIG)-based WAAM technology mainly focuses on Mg-Al series alloys,and there are relatively few studies on rare earth magnesium alloys.Thin-walled parts of Mg-6Gd-1Y-0.2Zr alloy were fabricated by TIG-WAAM,and their microstructure characteristics and mechanical properties were studied.The results show that the thin-walled part has a well-formed surface,and its microstructure is mainly composed of α-Mg matrix,Mg24(Gd,Y)5 phase and γ'phase.Due to undergoing different numbers of thermal cycles,the grain size and mechanical properties are unevenly distributed along the height direction of the thin-walled part.The average grain sizes at the bottom,middle and top sections of the thin-walled part are 44,101 and 80 μm respectively.The Vickers hardness decreases gradually from the bottom to the top.The ultimate tensile strengths(UTS)in the horizontal and height directions are(243±3)MPa and(219±10)MPa,respectively;the yield strengths(YS)are(159±1)MPa and(143±6)MPa respectively;the elongations(EL)are(15.0±1.4)%and(17.2±0.9)%,respectively.The performance differences between directions can be attributed to the formation of columnar grains structures due to the temperature gradient during the cooling,which leads to anisotropic microstructure and mechanical properties of the thin-walled part.关键词
电弧增材制造/Mg-6Gd-1Y-0.2Zr合金/组织演变/力学性能Key words
wire-arc additive manufacturing/Mg-6Gd-1Y-0.2Zr alloy/microstructure evolution/mechanical properties分类
矿业与冶金引用本文复制引用
黄蒙,李家民,何凌欢,侯娟,唐伟能,莫宁,时云,杨义..TIG电弧增材制造Mg-6Gd-1Y-0.2Zr合金的微观组织及力学性能研究[J].有色金属材料与工程,2025,46(3):53-62,10.基金项目
上海市科技创新项目资助(XTCX-KJ-2022-2-11) （XTCX-KJ-2022-2-11）
