Achieving high strength-ductility synergy in a Mg 97 Y 1 Zn 1 Ho 1 alloy via a nano-spaced long-period stacking-ordered phase

被引：22

作者：

Fan, Mingyu ^{[1
]}

Cui, Ye ^{[1
]}

Zhang, Yang ^{[1
]}

Wei, Xinghao ^{[1
]}

Cao, Xue ^{[2
]}

Liaw, Peter K. ^{[3
]}

Yang, Yuansheng ^{[4
]}

Zhang, Zhongwu ^{[1
]}

机构：

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

[2] Harbin Engn Univ, Coll Comp Sci & Technol, Harbin 150001, Peoples R China

[3] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA

[4] Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China

来源：

JOURNAL OF MAGNESIUM AND ALLOYS | 2023年 / 11卷 / 04期

基金：

中国博士后科学基金; 美国国家科学基金会;

关键词：

Mg wrought alloy; Mechanical properties; Long-period stacking-ordered (LPSO) phase; Age-strengthening behavior; Strengthening mechanism; MECHANICAL-PROPERTIES; MAGNESIUM ALLOYS; DEFORMATION-BEHAVIOR; MICROSTRUCTURE EVOLUTION; AS-CAST; GD; TEMPERATURE; 14H; COMPRESSION;

D O I：

10.1016/j.jma.2022.01.002

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Achieving high strength in Mg alloys is usually accompanied by ductility loss. Here, a novel Mg97Y1Zn1Ho1 at.% alloy with a yield strength of 403 MPa and an elongation of 10% is developed. The strength-ductility synergy is obtained by a comprehensive strategy, including a lamella bimodal microstructure design and the introduction of nano-spaced solute-segregated 14H long-period stacking-ordered phase (14H LPSO phase) through rare-earth Ho alloying. The lamella bimodal microstructure consists of elongated un-recrystallized (un-DRXed) coarse grains and fine dynamically-recrystallized grains (DRXed regions). The nano-spaced solute-segregated 14H LPSO phase is distributed in DRXed regions. The outstanding yield strength is mainly contributed by grain-boundary strengthening, 18R LPSO strengthening, and fiber -like reinforcement strengthening from the nano-spaced 14H LPSO phase. The high elongation is due primarily to the combined effects of the bimodal and lamellar microstructures through enhancing the work-hardening capability.& COPY; 2022 Chongqing University. Publishing services provided by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY-NC-ND license ( http://creativecommons.org/licenses/by-nc-nd/4.0/ ) Peer review under responsibility of Chongqing University

引用

页码：1321 / 1331

页数：11

共 67 条

[1] Long-period ordered structure in a high-strength nanocrystalline Mg-1 at% Zn-2 at% Y alloy studied by atomic-resolution Z-contrast STEM [J].