Porduction and investigation of graded porous metals by rolling in a time-varying rolling gap

正如申请人先前的工作所表明的那样，随着时间变化的滚动间隙的轧制提供了提供具有特定调整的结构和性能梯度的多孔性金属的可能性。然而，多孔性金属在时变辊缝中轧制时其结构变化的机理尚未得到研究。因此，在本研究项目中，需要阐明轧制工艺参数与所得到的材料结构之间的关系，以便提高在时变间隙中轧制产生的多孔金属的潜力。虽然研究是在盐层渗透产生的多孔铝的例子上进行的，但可以假设重大发现也可以转移到其他多孔性金属上。拟议的调查计划的基本要素是具有时间恒定和可变滚动间隙的滚动试验，以及使用连续介质模型和气孔分辨模型对所得到的结构进行计算机层析重建以及对轧制间隙中的过程进行有限元模拟。

As the applicant's prior work has shown, rolling with a time-varying rolling gap offers the possibility of providing porous metals with a specifically adjusted structure and property gradient. However, the mechanisms by which the structure of the porous metal changes during rolling in the time-varying roll gap have not yet been investigated. Therefore, in this research project, the correlation between rolling process parameters and resulting material structure is to be elucidated so that the potential of porous metals produced by rolling in the time-varying gap can be raised. Although the investigations are to be carried out on the example of porous aluminum, produced by infiltration of a salt bed, it can be assumed that significant findings are transferable to other porous metals. Essential elements of the proposed investigation program are rolling trials with a time-constant and variable rolling gap in conjunction with computer tomographic reconstructions of the resulting structure and finite element simulations of the processes in the rolling gap, using a continuum model as well as a pore-resolved model.