Effects of Cu and Ce co-addition on the microstructure and mechanical properties of Mg-6Zn-0.5Zr alloy

被引：21

作者：

He, M. L. ^{[1
,2
]}

Luo, T. J. ^{[1
,2
]}

Liu, Y. T. ^{[3
]}

Lin, T. ^{[3
]}

Zhou, J. X. ^{[3
]}

Yang, Y. S. ^{[1
,2
,3
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China

[2] Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China

[3] Shandong Key Lab High Strength Lightweight Metall, Jinan 250014, Shandong, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2018年 / 767卷

关键词：

Magnesium alloy; Microalloying; Microstructure; Nano-scale precipitates; Tensile properties; MG-ZN; AS-CAST; TENSILE PROPERTIES; MAGNESIUM ALLOYS; GRAIN-REFINEMENT; CERIUM ADDITION; PHASE-RELATIONS; HIGH-STRENGTH; TEXTURE; DEFORMATION;

D O I：

10.1016/j.jallcom.2018.07.169

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this work, the microalloying approach was adopted to improve the mechanical properties of Mg-6Zn-0.5Zr alloy by co-addition of trace Cu and Ce elements. The results showed that the grain size of the Mg-6Zn-0.5Zr-0.5Cu-0.5Ce alloy was refined, and MgZnCu and Mg-Zn-Ce phases formed by the microalloying of Cu and Ce. In addition, high-density nano-scale precipitates were found in the matrix after extrusion. The alloy with Cu and Ce addition showed a basal texture with a stronger texture intensity. The yield strength, ultimate tensile strength and elongation of the as-extruded Mg-6Zn-0.5Zr-0.5Cu-0.5Ce alloy were 304 MPa, 345 MPa and 20.0%, respectively. This work demonstrated a close microstructure-strength relationship in which the refined grain size and abundant nano-scale precipitates led to an increase in the tensile yield strength of approximately 59 MPa compared with that of the Cu and Ce free alloy. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：1216 / 1224

页数：9

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