Effects of Aging on the Evolution of Microstructure and Mechanical Properties of an Al – Li – Cu – Mg Alloy with Ag, Zr, Mn, and Zn Additives

• Published in: Metal science and heat treatment Vol. 57; no. 11-12; pp. 673 - 677
• Main Authors: Sun, Zhong-gang, Bao, Peng-li, Ma, Chao, Chen, Jie, Guo, Xuan, Li, Hua-guan, Ling, Juan
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.03.2016; Springer
• Subjects: Aluminum alloys; Aviation; Characterization and Evaluation of Materials; Chemistry and Materials Science; Classical Mechanics; Engineering Thermodynamics; Heat and Mass Transfer; Materials Science; Mechanical properties; Metallic Materials; Specialty metals industry; Zinc (Metal); Al – Li alloys; mechanical properties; aging
• ISSN: 0026-0673; 1573-8973
• DOI: 10.1007/s11041-016-9941-7

The microstructure and the post-aging hardness of an Al – Li – Cu – Mg alloy is studied by the methods of transmission electron microscopy. Tensile tests are performed. The volume fraction and the size of the particles of the δ′, S and T 1 phases are shown to be dependent on the aging temperature and time. The effect of the precipitates of the δ′, S and T 1 phases on the hardening of the Al – Li – Cu – Mg alloy during aging is determined.