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

正如申请人之前的工作所表明的那样，随时间变化的轧制间隙提供了提供具有特定调整结构和性能梯度的多孔金属的可能性。然而，在时变轧制间隙中，多孔金属在轧制过程中结构变化的机理尚未得到研究。因此，在本研究项目中，将阐明轧制工艺参数与所得材料结构之间的关系，从而提高在时变间隙中轧制产生的多孔金属的潜力。虽然调查将以多孔铝为例，由盐层渗透产生，但可以假设，重要的发现可转移到其他多孔金属上。所提议的研究计划的基本要素是使用时间常数和可变轧制间隙进行轧制试验，并结合计算机层析成像重建结果结构和轧制间隙过程的有限元模拟，使用连续体模型和孔隙分解模型。

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.