Improvement of mechanical behaviors of a superlight Mg-Li base alloy by duplex phases and fine precipitates

JOURNAL OF ALLOYS AND COMPOUNDS

卷:735

Article

Zou, Yun^1,2  Zhang, Lehao³  Li, Yang²  Wang, Hongtao⁴  Liu, Jiabin³  Liaw, Peter K.⁵  Bei, Hongbin⁶  Zhang, Zhongwu¹ 

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

[2] Zhengzhou Univ, Sch Mech Engn, Zhengzhou 450001, Henan, Peoples R China

[3] Zhejiang Univ, Sch Mat Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China

[4] Zhejiang Univ, Inst Appl Mech, Hangzhou 310027, Zhejiang, Peoples R China

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

[6] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA

关键词: Mg-Li alloy;    Mechanical properties;    Work-hardening;    Tension-compression yield asymmetry;   

DOI  :  10.1016/j.jallcom.2017.12.025

来源: Elsevier

【 摘 要 】

Limitations of strength and formability are the major obstacles to the industrial application of magnesium alloys. Here, we demonstrate, by producing the duplex phases and fine intermetallic particles in composition-optimized superlight Mg-Li-Al alloys, a unique approach to simultaneously improve the comprehensive mechanical properties (a strength-ductility balance). The phase components and microstructures, including the size, morphology, and distribution of precipitated-intermetallic particles can be optimized by tuning the Li content, which strongly influences the work-hardening behavior and tension-compression yield asymmetry. (c) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

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