Modified Johnson-Cook model incorporated with electroplasticity for uniaxial tension under a pulsed electric current

• Published in: Metals and materials international Vol. 24; no. 1; pp. 42 - 50
• Main Authors: Kim, Moon-Jo, Jeong, Hye-Jin, Park, Ju-Won, Hong, Sung-Tae, Han, Heung Nam
• Format: Journal Article
• Language: English
• Published: Seoul The Korean Institute of Metals and Materials 2018; Springer Nature B.V; 대한금속·재료학회
• Subjects: Aluminum base alloys; Characterization and Evaluation of Materials; Chemistry and Materials Science; Deformation; Deformation effects; Electric currents; Engineering Thermodynamics; Heat and Mass Transfer; Machines; Magnesium base alloys; Magnetic Materials; Magnetism; Manufacturing; Materials Science; Metallic Materials; Parameter modification; Processes; Solid Mechanics; Tensile deformation; 재료공학; deformation; alloys; tensile test; electroplasticity; mechanical properties
• ISSN: 1598-9623; 2005-4149
• DOI: 10.1007/s12540-017-7297-1

An empirical expression describing the electroplastic deformation behavior is suggested based on the Johnson-Cook (JC) model by adding several functions to consider both thermal and athermal electric current effects. Tensile deformation behaviors are carried out for an AZ31 magnesium alloy and an Al-Mg-Si alloy under pulsed electric current at various current densities with a fixed duration of electric current. To describe the flow curves under electric current, a modified JC model is proposed to take the electric current effect into account. Phenomenological descriptions of the adopted parameters in the equation are made. The modified JC model suggested in the present study is capable of describing the tensile deformation behaviors under pulsed electric current reasonably well.