Refining Al-20Si Alloy by Appending Trace Sr-Sc-Ce Nanoparticles and Ultrasonic Vibration Processing

Jiping Lei,Bowen Lei,Kai Zhang, Guanlin Liu, Yuanyuan Liu

PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE(2024)

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摘要
In this study, Al-20Si alloy is modified by appending trace Sr-Sc-Ce nanoparticles and ultrasonic vibration processing (UVP). The consequences indicate that its microstructure is significantly refined and its mechanical characteristics are improved. The effect of the favorable refinements is achieved by appending 0.2% Sr-0.15% Sc-0.3% Ce and performing UVP. The primary Si is the minimum, the grain roundness coefficient and the strength of extension are the maximum, and the spheroidizing effect of alpha-Al is the best. The elongation and hardness are the highest when 0.4% Ce is appended. The research consequences afford a reasonable process scheme for manufacturing high-quality wear-resistant material of the automotive and aerospace industries. Herein, the effect of the combination of trace Sr-Sc-Ce modifier and ultrasonic vibration processing is tested on the grain refinement and spheroidization of Al-20Si, and the improvement of mechanical characteristics is more promoted. Thus, a reasonable process scheme is afforded for manufacturing high-quality wear-resistant material of the automotive and aerospace industries.image (c) 2023 WILEY-VCH GmbH
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关键词
nanoparticles,primary Si,roundnesses,trace Sr-Sc-Ce
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