Development of Constitutive Equations and Processing Maps Using Dynamic Modeling Approach

在这个项目中，本构方程和处理地图使用一个 将为金属成形过程的动态建模提供一种新的方法 流程. Inconel合金718将被用作工作材料。 选择这种合金是因为它在各个领域的广泛应用 要求在老化过程中具有高强度、耐腐蚀性和可焊接性 条件 一个计算机程序将被用来计算一个数组， 值，给出作为时间函数的所需柱塞位置， 应变速率和试样高度的特定组合。 有效应力和有效应变率值将被提取 在不同应变水平和试验温度下的流动曲线; 将由此导出本构方程。 加工图 将被开发，以描述每一个内在的可操作性 材料和评估耗散/冶金过程 在稳定区和不稳定区的热变形过程中发生， 并在稳定区域中确定最佳温度， 应变率范围来处理材料。 本研究是 在金属成形领域很重要， 应用.

In this project constitutive equations and processing maps using a dynamic modeling approach will be developed for metal forming processes. Inconel Alloy 718 will be used as the work material. This alloy is selected because of its extensive application in areas requiring high strength, corrosion resistance and weldability in aged condition. A computer program will be used to calculate an array of values, giving the desired ram position as a function of time for particular combinations of strain rate and specimen height. Effective stress and effective strain-rate values will be extracted at various strain levels and test temperatures from flow curves; constitutive equations will be derived therefrom. Processing maps will be developed to describe the intrinsic workability of each material and to evaluate the dissipative/metallurgical processes occurring during hot deformation in the stable and unstable regions, and to identify in the stable region the optimum temperature and strain-rate range for processing the materials. This research is important in the area of metal forming and has immediate potential applications.