Microstructure analyses and phase-field simulation of partially divorced eutectic solidification in hypoeutectic Mg-Al Alloys

查看全文 作　　者：Joo-Hee [1]Kang;Jiwon [1]Park;Kyung [1]Song;Chang-Seok [1]Oh;Oleg [2]Shchyglo;Ingo [2]Steinbach

机构地区：[1]Korea Institute of Materials Science,Changwon 51508,Republic of Korea;[2]Interdisciplinary Centre for Advanced Materials Simulation,Ruhr-University Bochum,44801 Bochum,Germany

出　　处：《Journal of Magnesium and Alloys》索引2022年第10卷第6期,共8页

基　　金：supported by the Fundamental Research Program of Korea Institute of Materials Science(PNK7760 and PNK7770);the National Research Foundation of Korea(2020R1A2C2008416 and 2021M3H4A6A01049712)。 摘　　要：In this study the partially divorced eutectic microstructure ofα-Mg andβ-Mg17Al12was investigated by electron backscatter diffraction,transmission electron microscopy,and phase-field modeling in hypoeutectic Mg-Al alloys.The orientation relationships between the individual eutecticαgrains,eutecticβphase,and primaryαgrains were investigated.While the amount of eutectic morphology is primarily determined by the Al content,the in-depth microstructure analyses and the phase-field simulation suggest non-interactive nucleation and growth of eutecticαphase in theβphase grown on the interdendritic primaryαdendrites.Also,phase-field simulations showed a preferred nucleation sequence where theβphase nucleates first and subsequently triggers the nucleation of eutecticαphase at the movingβphase solidification front,which supports the microstructural analysis results. 关键词：Mg-Al alloy Partially divorced eutectic SOLIDIFICATION Electron backscatter diffraction Phase-Field modeling

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Microstructure analyses and phase-field simulation of partially divorced eutectic solidification in hypoeutectic Mg-Al Alloys

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