New poly-types of LPSO structures in a non-equilibrium Mg_(97)Zn_(1)Y_(1.6)Ca_(0.4)alloyOA
In this study,a comprehensive analysis of microstructural features,morphology,crystal structures,and interface structures of long-period stacking ordered(LPSO)structures in a non-equilibrium Mg_(97)Zn_(1)Y_(16)Ca_(0.4)alloy cast in a steel mold was carried out.The addition of Ca element plays an important role in the refinement of LPSO structure.The result reveals new poly-types including 20H F2F2F4,60R(F2F3F3)_(3),and 66H F2F3F3F2(F6)_(4)featuring a 6-Mg structure,alongside the prevalent 18R and 14H LPSO structures.The incoherent interface between 20H and the Mg matrix is split into two dislocation arrays,leading to the formation of a segment of 60R_(1).Moreover,the superstructure 116L,designated as(F2)_(18)F4,is formed through the ordered distribution of F4 stacking faults in 18R.
Qian-qian Jin;Zi-hui Tang;Wen-long Xiao;Xiu-yu Qu;Xu-hao Han;Lin Mei;Xiao-hong Shao;Xiu-liang Ma
School of Biological and Chemical Engineering,Guangxi University of Science and Technology,Liuzhou 545006,Guangxi,China Center for the Structure of Advanced Matter,School of Electronic Engineering,Guangxi University of Science and Technology,Liuzhou 545006,Guangxi,ChinaSchool of Biological and Chemical Engineering,Guangxi University of Science and Technology,Liuzhou 545006,Guangxi,ChinaCenter for the Structure of Advanced Matter,School of Electronic Engineering,Guangxi University of Science and Technology,Liuzhou 545006,Guangxi,ChinaCenter for the Structure of Advanced Matter,School of Electronic Engineering,Guangxi University of Science and Technology,Liuzhou 545006,Guangxi,ChinaCenter for the Structure of Advanced Matter,School of Electronic Engineering,Guangxi University of Science and Technology,Liuzhou 545006,Guangxi,ChinaCenter for the Structure of Advanced Matter,School of Electronic Engineering,Guangxi University of Science and Technology,Liuzhou 545006,Guangxi,ChinaShenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,ChinaBay Area Center for Electron Microscopy,Songshan Lake Materials Laboratory,Dongguan 523808,Guangdong,China
金属材料
LPSO structurescrystal structureMg alloysheterogeneous interface
《China Foundry》 2025 (1)
P.83-89,7
supported by the open research fund of Songshan Lake Materials Laboratory(No.2022SLABFN08)Guangxi Science and Technology Base and Talents Special Project(Nos.Guike AD20297034 and AD21220053)the National Natural Science Foundation of China(No.51801214 and 52171021)the Research Start-up Funding from Guangxi University of Science and Technology(No.03200150)the Middle-aged and Young Teachers’Basic Ability Promotion Project of Guangxi(No.2022KY0329)。
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