Microstructure,mechanical properties and corrosion resistance of as-cast and as-extruded Mg-4Zn-1La magnesium alloy

作     者：Huseyin Zengin Yunus Turen Hayrettin Ahlatci Yavuz Sun Huseyin Zengin;Yunus Turen;Hayrettin Ahlatci;Yavuz Sun

作者机构：Department of Metallurgy and Materials EngineeringKarabuk University78050 KarabukTurkey Iron and Steel InstituteKarabuk University78050 KarabukTurkey 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2020年第39卷第8期

页      面：909-917页

核心收录：

学科分类：0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 0702[理学-物理学] 

基　　金：financially supported by the Scientific Research Projects of Karabuk University(BAP)(No.KBUBAP-16/1-DR-075) 

主　　题：Magnesium alloys La modification Extrusion Microstructure Mechanical properties Corrosion 

摘      要：Microstructure,mechanical properties and corrosion resistance of as-cast and as-extruded Mg-4 wt%Zn-1 wt%La magnesium alloys were *** alloys were produced by low-pressure die casting method and extruded at 350℃after homogenization at 400℃for 24 *** results show that the as-cast alloy mainly consists of primaryα-Mg matrix and Mg-Zn-La ternary second phases(also called T-Phase)along grain boundaries and isolated spherical particles inside the *** extrusion at350℃,the average grain size decreases by 81%due to dynamic recrystallization mechanism and T-phase particles are distributed along the extrusion *** elongation,yield strength and tensile strength of the as-cast Mg-4Zn-1La alloy increase by 179%,90%and 40%,respectively,as a result of the extrusion *** as-extruded Mg-4Zn-1La alloy shows better corrosion resistance than the as-cast alloy due to increased grain boundaries and decreased content of T-phase.