Design of novel high-performance Al–Cu–Mg alloys containing Zn and Li-Reference-Cited by-同舟云学术

Design of novel high-performance Al–Cu–Mg alloys containing Zn and Li

Published:2015-10-20 Issue:3 Volume:231 Page:349-357
ISSN:1464-4207
Container-title:Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
language:en
Short-container-title:Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications

Author:

Chen Zhiguo¹²³,Ren Jieke¹³,Yang Wenling¹³,Fang Liang¹³

Affiliation:

1. School of Materials Science and Engineering, Central South University, Hunan, PR China

2. Department of Mechanical and Electrical Engineering, Hunan University of Humanities, Science and Technology, Hunan, PR China

3. Light Alloy Research Institute, Central South University, Hunan, PR China

Abstract

To design novel high-performance aluminium alloys, the properties and microstructure of Al–4.2Cu–1.4Mg alloy containing Zn and Li have been investigated by tensile tests, fatigue crack propagation test, slow strain-rate tensile test, Kahn tear test, scanning electron micrography and transmission electron micrography. The stress corrosion cracking resistance and toughness of Al–4.2Cu–1.2Mg alloy can be markedly improved by small Zn addition. Independent Li addition has no significant effect on the corrosion resistance of Al–4.2Cu–1.2Mg alloy, but the tensile strength is improved and the fatigue crack propagation is restrained. Small Zn addition promotes the precipitation of S′ phase during age treatment, and the grain boundary precipitates are scarcer than those of the base alloy. The co-effect of Li and Zn addition promotes the fine and dispersed precipitation of the S′ (non-equilibrium Al2CuMg) phases in Al–4.2Cu–1.2Mg alloy. The comprehensive performance (the fracture toughness, tensile properties, stress corrosion resistance and fatigue crack propagation resistance) of Al–4.2Cu–1.2Mg alloy with 0.25% Zn and 1.0%Li is outstanding. This alloy could lay the foundation for the design of new aluminium alloys.

Publisher

SAGE Publications

Subject

Mechanical Engineering,General Materials Science

Link

http://journals.sagepub.com/doi/pdf/10.1177/1464420715612108

Reference22 articles.

1. Recently-Developed Aluminium Solutions for Aerospace Applications

2. Quantitative study of nanoscale precipitates in Al–Zn–Mg–Cu alloys with different chemical compositions

3. The effect of Zn on the age hardening response in an Al–Mg–Si alloy

4. Mechanical properties, intergranular corrosion behavior and microstructure of Zn modified Al–Mg alloys

5. Effects of Zn additions on the grain boundary precipitation and corrosion of Al-5083

Cited by 1 articles. 订阅此论文施引文献订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献

1. Research Progress of New Generation of Aluminum–Lithium Alloys Alloying;Advanced Engineering Materials;2024-05-13