Computer Simulation Of Al-(Cu)-(Mg) Alloy Microstructural Evolution

Micro-alloying is an important way to improve the application performance of aluminum alloy,and is a researching hotspot of this field.However,its evolution is a complex process,and this process is difficult to be observed directly by experiment.If the computer simulation(for example the Monte Carlo method)is applied in the research,the calculation process will become easier.Recent years,some scientist has researched the Monte Carlo Method and the visualization of grain morphology,and has applied the Monte Carlo Method to the complex alloy system,welding process and ceramic sintering process.The Monte Carlo method research for aluminum alloy has not been reported in the literature,especially the micro-alloying researches on Si,Sc,Zr are far from enough.Based on kinetics and thermodynamic theory,this paper discussed quite thoroughly the evolution research of the Al-Cu-Mg alloy,and tried to combine the kinetics theory with Monte Carlo method to establish the aluminum alloy evolution model.Based on the base alloy evolution model,the research on complex alloy containing microelement were discussed in simulation.Finally, the essay studied the impact of micro-alloying elements on solute atoms distribution during the initial aging stage to make further understanding of the micro-alloying element's influence and mechanism,and the laws of the interaction between solute atoms and vacancy were obtained.The simulation results conform to test data.In this paper,the complete the prediction of grain growth simulation is important for the research of the aluminum alloy,can be used as guidance in further research in the field of aluminum alloy microalloying.