Computation material science of structural-phase transformation in casting aluminium alloys

International Conference "Structural and Phase Transformations in Materials: Theory, Computer Modelling and Experiment"

材料科学;计算机科学

Golod, V.M.^1 ; Dobosh, L Yu^1

Peter the Grate St. Petersburg Polytechnic University, Institute of Metallurgy, Mechanical Engineering and Transport, Department of Metallurgical and Casting Technologies, Saint-Petersburg

195251, Russia^1

关键词: Computational materials science;    Computer thermodynamics;    Dendrite structures;    Meso-scale modeling;    Morphological evolution;    Nonequilibrium conditions;    Structural phase transformations;    Structural phase transition;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/192/1/012027/pdf
DOI  :  10.1088/1757-899X/192/1/012027

来源: IOP

【 摘 要 】

Successive stages of computer simulation the formation of the casting microstructure under non-equilibrium conditions of crystallization of multicomponent aluminum alloys are presented. On the basis of computer thermodynamics and heat transfer during solidification of macroscale shaped castings are specified the boundary conditions of local heat exchange at mesoscale modeling of non-equilibrium formation the solid phase and of the component redistribution between phases during coalescence of secondary dendrite branches. Computer analysis of structural - phase transitions based on the principle of additive physico-chemical effect of the alloy components in the process of diffusional - capillary morphological evolution of the dendrite structure and the o of local dendrite heterogeneity which stochastic nature and extent are revealed under metallographic study and modeling by the Monte Carlo method. The integrated computational materials science tools at researches of alloys are focused and implemented on analysis the multiple-factor system of casting processes and prediction of casting microstructure.