The refinement of dynamic deformation equation for AISI1215 steel using the Zener-Hollomon parameter

7th Global Conference on Materials Science and Engineering

工业技术（总论）;材料科学

Pu, C.L.^1 ; Fang, S.N.^1 ; Wang, H.^1 ; Lu, Y.^1 ; Sun, J.G.^1 ; Gui, F.^1

Huatian Engineering and Technology Corporation, Nanjing

210019, China^1

关键词: Coupled interaction;    Dynamic deformation;    Dynamic deformation behavior;    Equation coefficients;    Experimental materials;    Forming experiments;    Zener-Holloman parameters;    Zener-Hollomon parameter;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/474/1/012016/pdf
DOI  :  10.1088/1757-899X/474/1/012016

来源: IOP

【 摘 要 】

The flow stress of a metal being deformed depends on temperature, strain rate, and strain. The Johnson-Cook model describes these dependencies in a mathematical form with six material parameters, of which five have to be derived from forming experiments. However, the coupled interaction between parameters on flow stress has not been considered, and the solution of equation coefficients is difficult. This paper presents the development of a less complicated relationship between flow stress and forming parameters based on the Zener-Holloman parameter. In this paper, AISI1215 steel was chosen as experimental material and was deformed in the range of the temperatures of 750-850 °C and strain rate of 0.01-30 s-1 to resolve and verify the presented model. The investigation results show that the coefficients could be solved easily in the present equation through simple hot simulation experiments without complex and disputed mathematics. The experimental results were agreement with the modeling predictions. Here the dynamic deformation behavior was only considered before dynamic recrystallization.