Home Kovove Materialy-Metallic Materials 2021 Kovove Materialy-Metallic Materials Vol. 59 (2021), no. 6, pp.367–377

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Kovove Materialy-Metallic Materials Vol. 59 (2021), no. 6, pp.367–377

Title: Effect of heat treatment on microstructure and thermal expansion properties of as-cast (Al63Cu25Fe12)99Ce1 alloy
Author: Juan Wang, Zhong Yang, Hongbo Duan, Zhijun Ma, Dong Tao, Jianping Li

Abstract: The heat treatment of (Al63Cu25Fe12)99Ce1 alloy was performed at 650, 750, and 850 °C for different holding times. The effects of the heat treatment process on the alloy's microstructure and thermal expansion properties were studied. Results revealed that the cast alloy contained β-Al0.5Fe0.5 phase (β-phase), Al2Cu3 phase, Al13Ce2Cu13 phase, and icosahedral quasicrystal I-phase (I-phase). After holding at 750 °C for 6 h, the alloy contains only an I-phase and a small amount of Al13Ce2Cu13 phase. When the heat treatment temperature continued to increase, the I-phase was partially decomposed. After heat treatment, the thermal expansion coefficient of the alloy decreased obviously. Compared with as cast, the thermal expansion coefficient of the alloy decreased by about 10 % after holding at 750 °C for 6 h. The results show that the Al-Cu-Fe-Ce alloy with excellent microstructure and properties can be obtained by an appropriate heat treatment process.

Keywords: heat treatment, quasicrystal I-phase, microstructure, coefficient of thermal expansion
Published online: 30-Nov-2021
Year: 2021, Volume: 59, Issue: 6 Page From: 367, Page To: 377
doi:10.4149/km_2021_6_367
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