Enhanced strength and corrosion resistance of Mg-Gd-Y-Zr alloy with ultrafine grains

被引：45

作者：

Wan, Yingchun ^{[1
]}

Xu, Shiyuan ^{[1
]}

Liu, Chuming ^{[1
]}

Gao, Yonghao ^{[1
]}

Jiang, Shunong ^{[2
]}

Chen, Zhiyong ^{[1
]}

机构：

[1] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China

[2] Cent S Univ, Sch Civil Engn, Changsha 410075, Hunan, Peoples R China

来源：

MATERIALS LETTERS | 2018年 / 213卷

关键词：

Mg-Gd-Y-Zr alloy; Microstructure; Strength; Corrosion; HIGH-PRESSURE TORSION; MECHANICAL-PROPERTIES; MAGNESIUM ALLOYS; METALS; SHEETS;

D O I：

10.1016/j.matlet.2017.11.096

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Simultaneous improvements in strength and corrosion resistance of Mg-Gd-Y-Zr alloy were realized through forging at room temperature with formation of ultrafine grained (UFG) structure. Compared with its coarse grained (CG) counterpart, the UFG sample exhibits an enhancement of 211 MPa (103%) in yield strength and a reduction of 0.644 x 10 (5) A/cm(2) (25%) in corrosion current density. Effect of microstructure on the mechanical property was quantitatively investigated, revealing a good coincidence of the experimental result with the calculated one based on Bailey-Hirsch equation. The improvement in corrosion resistance is attributed to the formation of sub-grain boundaries. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：274 / 277

页数：4

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