Correlation between bulk and precipitate composition in Al-Zn-Mg-Cu alloys. (1st February 2022)

• Record Type: Journal Article
• Authors: Zou, Yan; Wu, Xiaodong; Tang, Songbai; Zhu, Qianqian; Song, Hui; Guo, Mingxing; Cao, Lingfei
• Is Part Of: Philosophical magazine letters. Volume 102:Number 2(2022)
• Page Start: 41
• Page End: 52
• Publication Date: 2022-02-01
• Subjects: Al-Zn-Mg-Cu -- precipitate composition -- Zn/Mg ratio -- atom probe tomography; Condensed matter -- Periodicals; Physics -- Periodicals; Solid state physics -- Periodicals; Physique -- Périodiques; 530.41
• DOI: 10.1080/09500839.2021.1998690
• Languages: English
• ISSNs: 0950-0839

Abstract

ABSTRACT: The composition of precipitates in peak-aged Al-Zn-Mg-Cu alloys with various Zn/Mg ratios has been investigated by atom probe tomography (APT). The results show that the η′ and the T′ phases have different compositions with a similar Zn/Mg ratio in the same alloy. The Zn/Mg ratio within precipitates was shown to be positively correlated with the Zn/Mg ratio in the alloy. Moreover, the size dependency of composition for ageing precipitates in Al-Zn-Mg-Cu alloys has been determined. This study enriches the understanding of precipitate composition relative to that of the bulk in Al-Zn-Mg-Cu alloys.