Improved bake-hardening response of Al-Zn-Mg-Cu alloy through pre-aging treatment. (1st April 2018)

• Record Type: Journal Article
• Authors: Lee, Yun-Soo; Koh, Dong-Hyeon; Kim, Hyoung-Wook; Ahn, Yong-Sik
• Is Part Of: Scripta materialia. Number 147(2018)
• Page Start: 45
• Page End: 49
• Publication Date: 2018-04-01
• Subjects: Aluminum alloys -- Pre-aging -- Precipitation -- Mechanical properties; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2017.12.030
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: The effect of pre-aging treatment on the bake-hardening response of an Al-Zn-Mg-Cu alloy was investigated. It was determined that pre-aging immediately after quenching is an effective method to form stabilized Guinier–Preston zones, which can act as precursors to form the metastable η′ phase, and then improve the bake-hardening response. Al-Zn-Mg-Cu alloy sheets pre-aged at 120 °C for 30 min retained high ductility, similar to that of their natural-aged condition, and demonstrated high strength after bake-hardening treatment. Graphical abstract: Image 1