Joint 5th International Conference on Advances in Solidification Processes;5th International Symposium on Cutting Edge of Computer Simulation of Solidification, Casting and Refining | |
Thermo-elasto-viscoplastic constitutive laws for metallic alloys during their solidification | |
土木建筑工程;计算机科学 | |
Laschet, G.M.^1 ; Behnken, H.^1 | |
ACCESS E.V., RWTH Aachen University, Intzestrasse 5, Aachen | |
D-52072, Germany^1 | |
关键词: A356 aluminium alloy; Alloy solidification; Elasto-viscoplastic; Isotropic hardenings; Microstructural parameters; Strength differences; Tension and compression; Thermomechanical behaviour; | |
Others : https://iopscience.iop.org/article/10.1088/1757-899X/529/1/012083/pdf DOI : 10.1088/1757-899X/529/1/012083 |
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来源: IOP | |
【 摘 要 】
To describe the thermomechanical behaviour of the semi-solid state during alloy solidification, specific viscoplastic constitutive laws are derived for the coherent and non-coherent regime of the mush. For the coherent semi-solid regime an original viscoplastic flow potential is derived, which includes micro-structural parameters. This potential takes also isotropic hardening, pressure dependence of yielding and the strength difference in tension and compression into account. For the non-coherent mushy state of suspensions under shear loading, a simplified viscoplastic potential is adopted by neglecting pressure effects on the solid dendrites. Continuity at mechanical coherency is imposed and allows the reduction of the model parameters of the non-coherent regime. The developed constitutive laws are implemented in Abaqus via a user-defined CREEP routine. Simulations of uniaxial tension, compression or pure shear experiments allow identifying the model parameters of an A356 aluminium alloy.
【 预 览 】
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Thermo-elasto-viscoplastic constitutive laws for metallic alloys during their solidification | 1294KB | download |