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10.3390/ma15020411
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Article

Effect of Cooling Rate on the Microstructure Evolution and Mechanical Properties of Iron-Rich Al–Si Alloy

by
Xiao Shen
1,
Shuiqing Liu
1,2,*,
Xin Wang
3,*,
Chunxiang Cui
3,
Pan Gong
4,
Lichen Zhao
3,
Xu Han
1,2 and
Zirui Li
1
1
School of Mechanical Engineering, Hebei University of Technology, Tianjin 300401, China
2
State Key Laboratory for Reliability and Intelligence of Electrical Equipment, School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300401, China
3
Key Laboratory for New Type of Functional Materials in Hebei Province, School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300401, China
4
State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
*
Authors to whom correspondence should be addressed.
Materials 2022, 15(2), 411; https://doi.org/10.3390/ma15020411
Submission received: 29 November 2021 / Revised: 30 December 2021 / Accepted: 4 January 2022 / Published: 6 January 2022
(This article belongs to the Special Issue Physical Metallurgy of Metals and Alloys)
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Abstract

The mechanical properties of iron-rich Al–Si alloy is limited by the existence of plenty of the iron-rich phase (β-Al5FeSi), whose unfavorable morphology not only splits the matrix but also causes both stress concentration and interface mismatch with the Al matrix. The effect of the cooling rate on the tensile properties of Fe-rich Al–Si alloy was studied by the melt spinning method at different rotating speeds. At the traditional casting cooling rate of ~10 K/s, the size of the needle-like β-Al5FeSi phase is about 80 μm. In contrast, the size of the β-Al5FeSi phase is reduced to 500 nm and the morphology changes to a granular morphology with the high cooling rate of ~104 K/s. With the increase of the cooling rate, the morphology of the β-Al5FeSi phase is optimized, meanwhile the tensile properties of Fe-rich Al–Si alloy are greatly improved. The improved tensile properties of the Fe-rich Al-Si alloy is attributed to the combination of Fe-rich reinforced particles and the granular silicon phase provided by the high cooling rate of the melt spinning method.
Keywords: Fe-rich Al–Si alloy; β-Al5FeSi phase; cooling rate; melt spinning; microstructure; strengthening mechanisms Fe-rich Al–Si alloy; β-Al5FeSi phase; cooling rate; melt spinning; microstructure; strengthening mechanisms

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MDPI and ACS Style

Shen, X.; Liu, S.; Wang, X.; Cui, C.; Gong, P.; Zhao, L.; Han, X.; Li, Z. Effect of Cooling Rate on the Microstructure Evolution and Mechanical Properties of Iron-Rich Al–Si Alloy. Materials 2022, 15, 411. https://doi.org/10.3390/ma15020411

AMA Style

Shen X, Liu S, Wang X, Cui C, Gong P, Zhao L, Han X, Li Z. Effect of Cooling Rate on the Microstructure Evolution and Mechanical Properties of Iron-Rich Al–Si Alloy. Materials. 2022; 15(2):411. https://doi.org/10.3390/ma15020411

Chicago/Turabian Style

Shen, Xiao, Shuiqing Liu, Xin Wang, Chunxiang Cui, Pan Gong, Lichen Zhao, Xu Han, and Zirui Li. 2022. "Effect of Cooling Rate on the Microstructure Evolution and Mechanical Properties of Iron-Rich Al–Si Alloy" Materials 15, no. 2: 411. https://doi.org/10.3390/ma15020411

APA Style

Shen, X., Liu, S., Wang, X., Cui, C., Gong, P., Zhao, L., Han, X., & Li, Z. (2022). Effect of Cooling Rate on the Microstructure Evolution and Mechanical Properties of Iron-Rich Al–Si Alloy. Materials, 15(2), 411. https://doi.org/10.3390/ma15020411

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