首页|Modified constitutive models for Inconel 718 considering current density and temperature in electrically assisted forming process

Modified constitutive models for Inconel 718 considering current density and temperature in electrically assisted forming process

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Electrically Assisted Forming(EAF)technology has obvious advantages in material forming.To develop an effective constitutive model considering electrical effects,room temperature and electrically assisted quasi-static uniaxial tensile tests were conducted using ultrathin nickel-based superalloy plates with a thickness of 0.25 mm.The research focused on the two most widely recognized effects:the Joule thermal and the electric athermal effects.The mechanism of current action can be divided into two scenarios:one considering the Joule thermal effect only,and the other considering both effects simultaneously.Two basic constitutive models,namely the Modified-Hollomon model and the Johnson-Cook(J-C)model,were selected to be optimized through the classification of two different situations,and four optimized constitutive models were proposed.It was found that the J-C model with simultaneous consideration of the Joule thermal effect and electric athermal effect had the best prediction effect by comparing the results of these four models.Finally,the accuracy of the optimization model was verified by finite element simula-tion of the electrically assisted stretching optimization model.The results show that the constitutive model can effectively predict the temperature effect caused by the Joule heat effect and the athermal effect of current on the material.

Joule heatingElastoplasticityPlastic deformationSuperalloysConstitutive models

Xuan CUI、Rui ZHAO、Min WAN

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School of Mechanical Engineering and Automation,Beihang University,Beijing 100191,China

Jiangxi Research Institute of Beihang University,Jiangxi 330000,China

National Natural Science Foundation of ChinaNational Natural Foundation of Jiangxi,ChinaFundamental Research Funds for the Central Universities,ChinaYoung Elite Scientists Sponsorship Program by the China Association for Science and Technology

521053162021BAB214046501LKQB2022107021YESS20200397

2024

10.1016/j.cja.2023.12.007

中国航空学报(英文版)
中国航空学会

中国航空学报(英文版)

CSTPCDEI
影响因子：0.847
ISSN：1000-9361
年,卷(期)：2024.37(2)
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