Effect of extrusion ratio on microstructure, texture and mechanical properties of indirectly extruded Mg-Zn-Ca alloy

被引：82
作者：
Tong, L. B. [1 ]
Zheng, M. Y. [2 ]
Cheng, L. R. [1 ]
Kamado, S. [3 ]
Zhang, H. J. [1 ]
机构：
[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Rare Earth Resources Utilizat, Changchun 130022, Peoples R China
[2] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China
[3] Nagaoka Univ Technol, Dept Mech Engn, Nagaoka, Niigata 9402188, Japan
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2013年 / 569卷
基金：
国家高技术研究发展计划(863计划); 中国国家自然科学基金;
关键词：
Mg-Zn-Ca alloy; Extrusion ratio; Microstructue; Texture; Mechanical properties; MAGNESIUM ALLOY; HIGH-STRENGTH; DYNAMIC RECRYSTALLIZATION; HOT EXTRUSION; GRAIN-SIZE; DEFORMATION; PARAMETERS; EVOLUTION; SHEET; AZ80;
D O I：
10.1016/j.msea.2013.01.052
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Indirect extrusion of as-cast Mg-5.25 Zn-0.6 Ca (wt%) alloy was performed at 300 degrees C with different extrusion ratios (ER, 20:1 and 10:1), and the microstructure, texture and tensile properties of the as-extruded alloys were investigated in the current study. With the increase of ER, the volume fraction of DRXed grains was remarkably increased, but the average DRXed grains size was almost unchanged. The basal texture weakening phenomenon occurred in the as-extruded alloy with higher ER, which resulted from the higher volume fraction of the DRXed grain. Intensive basal fiber texture was observed in the unDRXed grains, but the basal planes of the DRXed grains were inclined to ED from 0 degrees to 35 degrees. The ER had only little effect on the tensile properties of the as-extruded alloys; due to the similar strengthening effect from the unDRXed and DRXed grains, a competitive mechanism exists between the fine grain strengthening and texture weakening effect. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：48 / 53
页数：6
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