Effects of Sn/In additions on natural and artificial ageing of Al–Mg–Si alloys. Issue 17 (22nd November 2018)

• Record Type: Journal Article
• Authors: Cheng, Tao; Jia, Zhihong; Weng, Yaoyao; Hao, Longlong; Liu, Qing
• Is Part Of: Materials science and technology. Volume 34:Issue 17(2018)
• Page Start: 2136
• Page End: 2144
• Publication Date: 2018-11-22
• Subjects: Al–Mg–Si alloys -- Sn -- In -- natural ageing -- artificial ageing -- vacancies -- cluster -- precipitation; Materials science -- Periodicals; Microstructure -- Periodicals; Metallurgy -- Periodicals; 620.1105
• DOI: 10.1080/02670836.2018.1517472
• Languages: English
• ISSNs: 0267-0836

Abstract

ABSTRACT: The effect of Sn or In addition on natural ageing and subsequent artificial ageing of Al–Mg–Si alloys was investigated. In addition not only retarded the natural ageing but also improved the T6 hardness. Although Sn addition retarded the natural ageing as well, precipitation kinetics was delayed. In addition, slightly refined the β′′ phase distribution. But β′′ phase was coarse with addition of Sn. During artificial ageing, the vacancies released from binding complexes promote the formation of β′′. The detrimental effects of Sn on artificial ageing could be attributed to the reduction of the amount of Sn solutes and of available Mg solutes forming β′′.