Influence of Sr on microstructure evolution, mechanical and corrosion properties of extruded Mg-2Zn-0.5Ca alloy

被引:8
作者
Qin, Junlong [1 ]
Chang, Lili [1 ]
Su, Xiaojing [1 ]
机构
[1] Shandong Univ, Sch Mat Sci & Engn, Jinan 250061, Shandong, Peoples R China
关键词
Mg-Zn-Ca-Sr alloys; Extrusion; Microstructure; Mechanical properties; Corrosion properties; SEVERE PLASTIC-DEFORMATION; MG-ZN; GRAIN-SIZE; ELECTROCHEMICAL CORROSION; FRACTURE-BEHAVIOR; MN ALLOYS; CA; MAGNESIUM; TEXTURE; RECRYSTALLIZATION;
D O I
10.1016/j.jma.2023.03.008
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
Degradable Mg-Zn-Ca alloys with Sr addition were prepared by vacuum melting and hot extrusion. Effect of Sr on microstructure, mechanical and corrosion properties of hot extruded Mg-2Zn-0.5Ca- x Sr ( x = 0, 0.5, 1.0) alloys was investigated. The results show that Sr addition into Mg-2Zn-0.5Ca alloys produced significant grain refinement in ingots and obvious texture weakening effects in extruded bars. The ultimate compressive strength increased as the Sr content increased, while the ultimate tensile strength increased firstly and then declined with the increasing of Sr content. Electrochemical tests indicated the corrosion current density of the surface parallel to extrusion direction (ED) was much lower than that of the surface perpendicular to ED. In-vitro immersion tests demonstrated the increase in the pH of solution and weight loss of Mg-2Zn-0.5Ca-0.5Sr alloy remain the lowest during immersion tests. The best comprehensive property was obtained in Mg-2Zn-0.5Ca-0.5Sr alloy, which has the largest strength and the best corrosion resistance. (c) 2023 Chongqing University. Publishing services provided by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY-NC-ND license ( http://creativecommons.org/licenses/by-nc-nd/4.0/ ) Peer review under responsibility of Chongqing University
引用
收藏
页码:3744 / 3757
页数:14
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