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Mechanical Properties of 7075-T6 Aluminum Alloy in Electrically Assisted Forming

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Publicado en:Metals vol. 15, no. 2 (2025), p. 117
Autor principal: Dou, Shasha
Otros Autores: Liu, Zhuang, Li, Zhijun, Shi, Haojie, Zhou, Kang, Xia, Jiansheng
Publicado:
MDPI AG
Materias:
Mechanical properties
Strain rate
Silicon nitride
Simulation
Software
Tensile tests
Accuracy
Constitutive relationships
Rheology
Metal forming
Thermoelectricity
Temperature
Constitutive equations
Aluminum alloys
Deformation effects
Power supply
Deformation
Electric currents
Alloys
Deformation resistance
Aluminum base alloys
Shear strength
Springback
Coupling
Acceso en línea:Citation/Abstract
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Resumen:The coupling effects of electrical pulse, temperature, strain rate, and strain on the flow behavior and plasticity of 7075-T6 aluminum alloy were investigated and characterized. The isothermal tensile test and electrically assisted isothermal tensile test were performed at the same temperature, and the typical models were further embedded in ABAQUS for numerical simulation to illustrate the electroplastic effect. The results showed that electrical pulses reduced deformation resistance but greatly increased elongation. Compared with the traditional Johnson–Cook model, the proposed modified electroplasticity constitutive equations have a certain improvement in calibration accuracy for a highly nonlinear and thermoelectric coupling dynamic behavior. Moreover, combined with the electrically assisted three-point bending experiment, it was found that the springback angle decreases with the increase in current density. This is very close to the experimental result, further verifying the effectiveness of the thermoelectric coupling constitutive equation.
ISSN:2075-4701
DOI:10.3390/met15020117
Fuente:Materials Science Database