Effects of composition and cooling rate on solidification structure of Al-xEr alloy

doi:10.13251/j.issn.0254-6051.2022.03.029

Abstract

Abstract: Microstructure and phase structure of solidified structure of the Al-xEr (x=10, 20, 30, mass fraction, %) alloy were analyzed by means of scanning electron microscope (SEM) and X-ray diffractometer (XRD), respectively. The results show that at cooling rate of 60 ℃/h, the structure of Al₃Er phase in the Al-10Er alloy is L1₂ with size of about 200 μm, which are connected in a fishbone shape. With the increase of Er content to 30%, the primary Al₃Er phase transforms into a block with size of about 1 mm. For the Al-30Er alloy, as the cooling rate decreases, the primary Al₃Er phase changes from a straight L1₂ structure to a wavy hR20 structure, and the eutectic structure changes from flocculent to striped.

Key words: Al-xEr alloy, composition, cooling rate, microstructure

CLC Number:

TG146.2

Ning Jing, Gao Kunyuan, Li Haonan, Wen Shengping, Huang Hui, Wu Xiaolan, Wei Wu, Nie Zuoren. Effects of composition and cooling rate on solidification structure of Al-xEr alloy[J]. Heat Treatment of Metals, 2022, 47(3): 151-154.

References

[1]Karnesky R A, Dunand D C, Seidman D N. Evolution of nanoscale precipitates in Al microalloyed with Sc and Er[J]. Acta Materialia, 2009, 57(14): 4022-4031.
[2]李静, 杨昇, 蔡斌, 等. Al-Er-xZr系列耐热铝合金导线的组织与性能[J]. 金属热处理, 2015, 40(11): 25-28.
Li Jing, Yang Sheng, Cai Bin, et al. Microstructure and properties of Al-Er-xZr heat-resistant aluminum alloy conductor[J]. Heat Treatment of Metals, 2015, 40(11): 25-28.
[3]Karnesky R A, Dalen Van M E, Dunand D C, et al. Effects of substituting rare earth elements for scandium in a precipitation-strengthened Al-0.08at.%Sc alloy[J]. Scripta Materialia, 2006, 55: 437-440.
[4]Knipling K E, Dunand D C, Seidman D N. Criteria for developing castable, creep-resistant aluminum-based alloys-A review[J]. International Journal of Materials Research, 2006, 97(3): 246-265.
[5]Hu Z, Yin Z, Lin J W, et al. Microstructural, electronic, and mechanical properties of L1₂ ordered Al3Er and Al3Yb intermetallics: An experimental and first-principles calculations[J]. Materials Research Express, 2019, 6(11): 116516.
[6]聂祚仁, 文胜平, 黄晖, 等. 铒微合金化铝合金的研究进展[J]. 有色金属学报, 2011, 21(10): 2361-2370.
Nie Zuoren, Wen Shengping, Huang Hui, et al. Research progress of Er-containing aluminum alloy[J]. The Chinese Journal of Nonferrous Metals, 2011, 21(10): 2361-2370.
[7]Gianoglio D, Marola S, Battezzati L, et al. Banded microstructures in rapidly solidified Al-3wt%Er[J]. Intermetallics, 2020, 119: 106724.
[8]Meyer A. Űber die kubische und rhomboedrische form des Al3Er[J]. Journal of the Less Common Metals, 1970, 20(4): 353-358.
[9]赵品. 材料科学基础教程[M]. 哈尔滨: 哈尔滨工业大学, 2002.
Zhao Pin. Fundamentals of Materials Science[M]. Harbin: Harbin Institute of Technology Press, 2002.

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