Original scientific paper

Constitutive model of 7075 aluminum at high temperature

W. C. Pei ; College of Mechanical Engineering, North China University of Science and Technology, Hebei, Tangshan, China
J. H. Qiao ; College of Mechanical Engineering, North China University of Science and Technology, Hebei, Tangshan, China
B. X. Liu ; College of Mechanical Engineering, North China University of Science and Technology, Hebei, Tangshan, China
H. C. Ji orcid.org/0000-0002-1592-6362 ; College of Mechanical Engineering, North China University of Science and Technology, Hebei, Tangshan, China

Abstract

In order to obtain the accurate mechanical properties of 7075 aluminum alloy, the Gleeble-1500D thermal simulation test machine was used to perform compression test on 7075 aluminum alloy. The deformation temperature range is 490 °C~560 °C, and the strain rate is 0,001 s-1~1 s-1. At present, for the high temperature thermal compression process, the Arrhenius constitutive model with strain compensation is usually used. The results show that the correlation coefficient of the Arrhenius constitutive model of 7075 aluminum alloy with strain compensation is 0,9894, and the average relative error is 5,6 %, realizing the fitting of flow stress and prediction, verified the feasibility of the model.

Keywords

7075 aluminum alloy; hot compression test; stress-strain curves; temperature; constitutive model

Hrčak ID:

273975

URI

https://hrcak.srce.hr/273975

Publication date:

1.7.2022.

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