NUMERICAL MODELING OF MAGNETOHYDRODYNAMICS AND SOLIDIFICATION PHENOMENA IN PAM PROCESSED TI-6AL-4V INGOTS
This paper presents a methodology for modeling and analysis of the interaction between two electromagnetic(EM)fields in a solidifying Ti-6Al-4V(Ti-6-4)ingot processed by the plasma arc cold hearth melting(PAM)process.The two EM fields are generated by the induction coils(stirrer)around the ingot mold and by the plasma torch.This methodology is based on the numerical solution of Maxwells equations,fluid flow,and heat transfer equations,and modeling of the grain structure.Numerical simulations at the macro-level were conducted using a CFD software.A stochastic model was developed and applied to simulate the grain structure at the mesoscopic level.Simulation results for 5-in and 8-in diameter Ti-6-4 ingots show that the plasma torch and the EM stirrer can have strong effects on both the fluid flow and the solidification structure.A comparison with an experimental grain structure of a 5-in diameter Ti-6-4 ingot is also provided.
Electromagnetic stirring ingot solidification grain structure plasma arc melting Ti-6-4 modeling and simulation
Laurentiu Nastac
The University of Alabama,Department of Metallurgical and Materials Engineering,Box 870202,Tuscaloosa,AL,35487,USA
国际会议
The 7th International Conference on Electromagnetic Processing of Materials(第七届冶金与材料电磁过程国际大会)
北京
英文
1-4
2012-10-22（万方平台首次上网日期，不代表论文的发表时间）