定向凝固镁合金组织形貌及力学性能研究进展  

Research Progress on Microstructure and Mechanical Properties of Directionally Solidified Magnesium Alloys

作　　者：靳康帅 张航 张旭曌 连永强 郭耀威 房大然 林小娉 JIN Kang-shuai;ZHANG Hang;ZHANG Xu-zhao;LIAN Yong-qiang;GUO Yao-wei;FANG Da-ran;LIN Xiao-ping(School of Materials Science and Engineering,Northeastern University,Shenyang 110819,Liaoning,China;School of Resources and Materials,Northeastern University at Qinhuangdao,Qinhuangdao 066004,Hebei,China)

机构地区：[1]东北大学材料科学与工程学院,辽宁沈阳110819 [2]东北大学秦皇岛分校资源与材料学院,河北秦皇岛066004

出　　处：《铸造》2024年第4期453-462,共10页Foundry

基　　金：国家自然科学基金项目(51775099);河北省自然科学基金项目(E2021501019,E2022501001)。

摘　　要：利用定向凝固技术调控镁合金晶体取向和组织结构,可以提高镁合金的力学性能。目前对镁合金定向凝固的研究仍处于探索阶段。综述了定向凝固镁合金的组织形貌及胞-枝晶转变特点,并结合课题组的研究讨论了定向凝固镁合金一次晶轴生长取向及其与力学性能相关性。简要介绍了定向凝固镁合金中的长周期堆垛结构相、定向凝固镁合金的耐腐蚀性能以及定向凝固过程数值模拟的研究情况,提出了镁合金定向凝固研究的重点与方向。The crystal orientation and microstructure of magnesium alloys can be adjusted by directional solidification,which can improve mechanical properties of Mg alloys.At present,the research on directional solidification of magnesium alloys is far from enough.In this paper,the microstructure and cell/dendrite transition in directionally solidified Mg alloys was summarized,and the correlation between the growth orientation of the primary dendrite arm and mechanical properties of alloys was discussed.Moreover,the LPSO phase and the corrosion resistance of directionally solidified Mg alloys were summarized,and the research on numerical simulation of directional solidification process was reviewed.On this basis,the research directions in directional solidification of Mg alloys were proposed.

关 键 词：定向凝固 镁合金 晶体取向 力学性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程] TG113[金属学及工艺—金属材料]