Evolution of Microstructure, Residual Stress, and Tensile Properties of Mg–Zn–Y–La–Zr Magnesium Alloy Processed by Extrusion

查看全文 作　　者：Huseyin [1]Zengin;Yunus [1]Turen;Muhammet Emre [1]Turan;Fatih Ayd?[1]n

机构地区：[1]Department of Metallurgical and Materials Engineering , Karabuk University , Baliklarkayasi Mevkii Demir Celik Kampusu

出　　处：《Acta Metallurgica Sinica(English Letters)》索引2019年第32卷第11期,共11页

基　　金：financially supported by the Scientific Research Projects of Karabuk University (KBU-BAP-16/1-DR-075) 摘　　要：The microstructure, texture, residual stress, and tensile properties of Mg–6 Zn–2 Y–1 La–0.5 Zr(wt%) magnesium alloy were investigated before and after extrusion process, which performed at 300 °C and 400 °C. The microstructural characterizations indicated that the as-cast alloy was comprised of α-Mg, Mg–Zn, Mg–Zn–La, and Mg–Zn–Y phases. During homogenization at 400 °C for 24 h, most of the secondary phases exhibited partial dissolution. Extrusion process led to a remarkable grain refi nement due to dynamic recrystallization(DRX). The degree of DRX and the DRXed grain size increased with increasing extrusion temperature. The homogenized alloy did not show a preferential crystallographic orientation, whereas the extruded alloys showed strong basal texture. The extrusion process led to a signifi cant improvement on the compressive residual stress and mechanical properties. The alloy extruded at 300 °C exhibited the highest basal texture intensity, the compressive residual stress and hardness, and yield and tensile strengths among the studied alloys. 关键词：ZK60 Magnesium alloy RESIDUAL stress Texture Mechanical properties EXTRUSION

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Evolution of Microstructure, Residual Stress, and Tensile Properties of Mg–Zn–Y–La–Zr Magnesium Alloy Processed by Extrusion

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