Microstructure Evolution of Cast Al-Si-Cu Alloys in Solution Treatment

开发一个软件在演员组铝合金的热处理期间预言微观结构的进化和机械性质的开发，我们在解决方案处理期间为溶质的再分配建模多部件合金。solidifi 阳离子模拟软件的预言或实验的结果为热处理的模拟提供了起始的微观结构和溶质分发。通过有硅，铜，镁，和铁的五的铝合金的二进制代码被建模。基本模型假定本地平衡(不在由于成核或生长冷却下面) 并且在稳固的成分的计算散开在团结期间。微观结构的进化被质、量的金属组织学在答案处理期间跟随。为第三的合金 Al-7%Si-3.5%Cu 的模拟的结果与试验性的观察相比。

To develop a software to predict the evolution of microstructure and the development of mechanical properties during the heat treatment of cast aluminum alloys, we modeled the redistribution of solute during the solution treatment of multicomponent alloys. The predictions of solidification simulation software or the results of experiment provided the initial microstructure and solute distribution for simulation of heat treatment. Binary through quinary aluminum alloys with silicon, copper, magnesium, and iron were modeled. The basic model assumed local equilibrium （no undercooling due to nucleation or growth） and computed diffusion in the solid constituents during solidification. The evolution of microstructure during solution treatment was followed by qualitative and quantitative metallography. The results of simulation for the ternary alloy Al-7%Si-3.5%Cu were compared to experimental observation.