Improving age hardening response and mechanical properties of a new Mg-RE alloy via simple pre-cold rolling

被引：60

作者：

Li, Guoqiang ^{[1
]}

Zhang, Jinghuai ^{[1
,2
]}

Wu, Ruizhi ^{[1
,2
]}

Liu, Shujuan ^{[3
]}

Song, Bo ^{[4
]}

Jiao, Yufeng ^{[5
]}

Yang, Qiang ^{[6
]}

Hou, Legan ^{[1
]}

机构：

[1] Harbin Engn Univ, Coll Mat Sci & Chem Engn, Key Lab Superlight Mat & Surface Technol, Minist Educ, Harbin 150001, Heilongjiang, Peoples R China

[2] Heihe Univ, Coll Sci, Heihe 164300, Peoples R China

[3] Harbin Inst Technol, Dept Mat Phys & Chem, Harbin 150001, Heilongjiang, Peoples R China

[4] Southwest Univ, Fac Mat & Energy, Chongqing 400715, Peoples R China

[5] Jiamusi Univ, Coll Mat Sci & Engn, Jiamusi 154007, Peoples R China

[6] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Rare Earth Resources Utilizat, Changchun 130022, Jilin, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2019年 / 777卷

基金：

中国国家自然科学基金; 黑龙江省自然科学基金;

关键词：

Mg alloys; Pre-cold rolling; Age hardening behavior; Microstructure; Mechanical properties; METAL-MATRIX NANOCOMPOSITES; MAGNESIUM ALLOY; STRENGTHENING MECHANISMS; STACKING-FAULTS; DEFORMATION-BEHAVIOR; TENSILE PROPERTIES; PRECIPITATE SHAPE; EXTENSION TWINS; HEAT-TREATMENT; ZN ADDITIONS;

D O I：

10.1016/j.jallcom.2018.11.082

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 study, a new preparation method is designed to simultaneously realize the light weight and high strength efficiently for magnesium (Mg) alloys. The alloy design concept is based on the multi-rare earth alloying and particularly the combined processes of pre-cold rolling and ageing treatment. Here the influence of pre-cold rolling prior to ageing treatment on microstructure evolution and mechanical properties of solution treated Mg alloy with a moderate RE content (similar to 7 wt%, RE = Gd, Y, Nd, Ho, Er) is systematically investigated. The non-cold rolled alloy exhibits an age-hardening response and improved tensile strength via beta '' precipitates due to multi-rare earth alloying. A simple pre-cold rolling introducing dislocations can further improve the efficiency of age hardening and tensile strength. The enhanced tensile strength of pre-cold rolled + peak-aged alloy is mainly attributed to the combination effects of fine and dense beta '' prismatic precipitates, basal SFs and dislocations. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：1375 / 1385

页数：11

共 75 条

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