Original scientific paper

High temperature deformation constitutive model of GGG70L duction iron

P. Huo ; College of Mechanical Engineering, North China University of Science and Technology, Hebei, Tangshan, China
Y. J. He ; College of Mechanical Engineering, North China University of Science and Technology, Hebei, Tangshan, China
J. F. Chen ; College of Mechanical Engineering, North China University of Science and Technology, Hebei, Tangshan, China *

* Corresponding author.

Abstract

In order to accurately describe the high temperature deformation behavior of GGG70L ductile iron, the thermal simulation experiments with deformation rate of 0,01~10 s-1 were carried out at 800~1 100 °C by Gleeble-1500D thermal simulation machine. The deformation behavior of GGG70L ductile iron was studied. The temperature compensated strain rate Zener-Hollomon parameter was introduced, and the constitutive model of GGG70L ductile iron was established based on the strain compensated Arrhenius model. The results show that the theoretical value of peak stress calculated by the constitutive model is in good agreement with the experimental results, and the correlation is 97,8 %, which can accurately describe the high temperature deformation behavior of GGG70L ductile iron

Keywords

GGG70L ductile iron; high temperature deformation; stress; Zener-Hollomon parameter; constitutive model

Hrčak ID:

312264

URI

https://hrcak.srce.hr/312264

Publication date:

1.4.2024.

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