Experimental investigation on aging treatment of 7050 alloy assisted by electric pulse

Kaijiao Kang; Dayong Li; Ao Wang; Dequan Shi; Guili Gao; Zhenyu Xu

Results in Physics (Mar 2020)

Experimental investigation on aging treatment of 7050 alloy assisted by electric pulse

Kaijiao Kang,
Dayong Li,
Ao Wang,
Dequan Shi,
Guili Gao,
Zhenyu Xu

Affiliations

Kaijiao Kang: School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040, China
Dayong Li: School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040, China; Key Laboratory of Advanced Manufacturing and Intelligent Technology, Ministry of Education, Harbin University of Science and Technology, Harbin 150080, China
Ao Wang: School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040, China
Dequan Shi: School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040, China; Key Laboratory of Advanced Manufacturing and Intelligent Technology, Ministry of Education, Harbin University of Science and Technology, Harbin 150080, China
Guili Gao: School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040, China; Key Laboratory of Advanced Manufacturing and Intelligent Technology, Ministry of Education, Harbin University of Science and Technology, Harbin 150080, China; Corresponding authors at: School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040, China.
Zhenyu Xu: School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040, China; Key Laboratory of Advanced Manufacturing and Intelligent Technology, Ministry of Education, Harbin University of Science and Technology, Harbin 150080, China; Corresponding authors at: School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040, China.

Journal volume & issue: Vol. 16
p. 103016

Abstract

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The microstructural evolution in 7050 alloy during rapid aging treatment was studied by using electrical pulse technique, and the properties of 7050 alloy has been investigated. Compared with the alloy experiencing the conventional heat treatment (CHT), the strength and hardness of the 7050 alloy is remarkably improving, and the aging time is reduced by 8 h saving energy. The microstructure of aging treatment 7050 alloy assisted by electric pulse is more uniform. Moreover, the kinetic equation of 7050 alloy aging treatment assisted by electric pulse was established. The calculating formula of the precipitated phase nucleation rate accelerated by electrical pulse processing was obtained according to the classical nucleation theory. The thermodynamic energy barrier to be overcome decreases in the process of 7050 alloy phase nucleation so that the nucleation rate is increased. It significantly improves the properties of 7050 alloy.

Published in Results in Physics

ISSN: 2211-3797 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Physics
Website: http://www.journals.elsevier.com/results-in-physics/

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