New Progress on Er-Containing Micro-Alloying Aluminum Alloys

Abstract:

Erbium is an effective micro-alloying element in aluminum alloys and has been investigated intensively. Similar with the addition of Sc in aluminum alloys, nanosized L1₂-ordered Al₃Er precipitates were formed coherently with the matrix in Er-containing micro-alloying aluminum alloys. Further, in the case of the addition of both Er and Zr, core-shell-structured Al₃(Zr_xEr_1−x) precipitates, instead of Al₃Er, were observed in a fine dispersion. Those thermally-stable precipitates can refine the grain size, minimize the segregation, homogenize the microstructure, enhance the strength, hinder the recrystallization, and thus improve the comprehensive performance of the aluminum alloys. This paper presents the effect of Er on the microstructure, mechanical properties and thermal stability of aluminum alloys. The research of some typical commercial aluminum alloys containing Er, is also reviewed here.

• Periodical: Materials Science Forum (Volume 877)
• Pages: 211-217
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.877.211
• Online since: November 2016
• Authors: Xiao Lan Wu, Zuo-Ren Nie*, Sheng Ping Wen, Kun Yuan Gao, Hui Huang
• Keywords: Aluminium Alloy, ER, Microalloying

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