Realistic microstructural morphology-based Representative Volume Elements for modeling the mechanical response of multi-phase steels

多相钢具有重量轻、屈服强度高的优点，在汽车结构中得到了广泛的应用。后者是由于硬马氏体和软铁素体或贝氏体组织之间的相互作用。通过设计两相的尺寸、分布和间距，可以达到较高的强度。以这种方式裁剪微观结构目前是通过试错来实现的。我们建议开发一种方法来建立微观结构的数学模型，以便使用计算机模拟来分析强度。利用目前可用的微观结构，我们建议开发一个工作流，将微观结构数字化，并将数学模型导入商业软件，其中它可以承受变形，使人联想到钢在制造过程中所经历的力。上述研究是设计双相钢微观组织的有力工具。

Multi-phase steels are widely used in automotive structures owing to their low weight and high yield strength. The latter is on account of the interplay between the hard Martensite and softer ferrite or Baininte structures. High strength can be achieved by engineering the size, distribution and spacing between the two phases. Tailoring the microstructure in this fashion is currently achieved by trial-and-error. We propose to develop a way to develop a mathematical model of the microstructure so that the strength can be analyzed using computer simulations. Using currently available microstructures, we propose to develop a workflow for digitizing the microstructure and importing the mathematical model into a commercial software wherein it can be subjected to deformation reminiscent of forces the steel will experience during manufacturing. The foregoing is a powerful tool for engineering the microstructure of dual-phase steels.