Microstructure and mechanical properties of new Mg-Zn-Y-Zr alloys with high castability and ignition resistance  

作　　者：T.A.Koltygina V.E.Bazhenov A.V.Koltygin A.S.Prosviryakov N.Y.Tabachkova I.I.Baranov A.A.Komissarov A.I.Bazlov 

机构地区：[1]National University of Science and Technology MISIS,Moscow 119049,Russia [2]A.M.Prokhorov General Physics Institute,Russian Academy of Sciences,Moscow 119991,Russia [3]Moscow State University of Medicine and Dentistry,Moscow 127473,Russia

出　　处：《International Journal of Minerals,Metallurgy and Materials》2024年第12期2714-2726,共13页矿物冶金与材料学报（英文版）

基　　金：the Ministry of Science and Higher Education of the Russian Federation for financial support under the Megagrant(No.075-15-2022-1133);by the Strategic Academic Leadership Program“Priority 2030”(No.K2-2022-001);For the sample preparation and TEM investigation,the authors thank the Collective Use Equipment Center“Material Science and Metallurgy”for the equipment modernization program represented by the Ministry of Higher Education and Science of Russian Federation(No.075-15-2021-696).

摘　　要：Complex studies of new Mg-Zn-Y-Zr system alloys have been carried out.The content range for the formation of the two-phase structure MgSS(Mg solid solution)+LPSO(long-period stacking ordered)in alloys of the Mg-Zn-Y-Zr system was determined by thermodynamic calculations.The effect of heat treatment regimes on microstructure,mechanical,and corrosion properties was invest-igated.The fluidity,hot tearing tendency,and ignition temperature of the alloys were determined.The best combination of castability,mechanical,and corrosion properties was found for the Mg-2.4Zn-4Y-0.8Zr alloy.The alloys studied are superior to their industrial counterparts in terms of technological properties,while maintain high corrosion and mechanical properties.The increased level of pro-perties is achieved by a suitable heat treatment regime that provides a complete transformation of the 18R to 14H modification of the LPSO phase.

关 键 词：metals and alloys liquid-solid reactions microstructure FLUIDITY mechanical properties corrosion transmission electron mi-croscopy 

分 类 号：TG146.22[一般工业技术—材料科学与工程]