Original scientific paper

Constitutive equations of AA6111 aluminum alloy

B. Z. Wang ; College of Mechanical Engineering, North China University of Science and Technology, Hebei, Tangshan, China
X. M. Huang ; College of Mechanical Engineering, North China University of Science and Technology, Hebei, Tangshan, China
C. Wang ; College of Mechanical Engineering, North China University of Science and Technology, Hebei, Tangshan, China
Z. Y. Wang ; College of Mechanical Engineering, North China University of Science and Technology, Hebei, Tangshan, China
C. Xing ; 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; National Center for Materials Service Safety, University of Science and Technology Beijing, China; School of Mechanical Engineering, University of

Abstract

The hot compression test was conducted in Gleeble-1 500D to study the hot flow stress behavior of AA6 111 aluminum alloy belonging to Al-Mg-Si series, at the deformation temperatures ranging from 350 to 500 °C and strain rates ranging from 0,01 s-1 to 1 s-1. And how the flow stress change with variation of strain, temperature and strain rate was investigated. The results show that flow stress increases with decreasing temperature and increasing strain rate; the AA6 111 is positive stain rate sensitive material; the main softening mechanism is dynamic recovery. Furthermore, constitutive equation considering the effect of strain was obtained based on Arrhenius equation. The predicted flow stress values well agree with the experimental results with some little aberration. The coefficient of association can be as high as 0,9 954, which shows high reference value for industry and simulation analysis.

Keywords

AA6 111; investigation of plastic deformation; hot compression; flow stress; constitutive equation

Hrčak ID:

218397

URI

https://hrcak.srce.hr/218397

Publication date:

1.7.2019.

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