Abstract

Crystallographic texture causes anisotropic formability of metal sheets, which results in the formation of uneven cup heights during deep drawing, called earing. Over the past decades, several methods had been developed to predict the earing behaviour of aluminium alloys. These methods are rather complex and can only be applied within strict sheet thickness ranges. Recently, a simple method has been presented and successfully applied on different sheet thicknesses. The method relies solely on {h00} type pole figure data. However, it is desired to be able to predict earing from other reflections as well. In this manuscript, a method which predicts the type and magnitude of earing only from the data of {111} pole figure measurements, is presented. The method was applied on a series of 0.3 and 3 mm thick cold rolled and annealed aluminium sheets, exhibiting rolling and recrystallization textures and the combination of these. It is shown that the proposed method gave similar results to those of deep drawing tests. It is concluded that using the presented method, the earing of aluminium sheets can be characterized solely from {111} pole figure measurement data.

中文翻译：

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从{111}极点图形预测铝板的盈余

摘要

晶体学纹理会导致金属板的各向异性成形，从而导致在深冲过程中形成称为耳边的不均匀杯高。在过去的几十年中，已经开发了几种方法来预测铝合金的耳部行为。这些方法相当复杂，只能在严格的板材厚度范围内使用。最近，已经提出了一种简单的方法并将其成功应用于不同的板厚。该方法仅依赖于{ h00}型极图数据。然而，期望也能够从其他反射来预测入耳。在此手稿中，提出了一种仅根据{111}极图测量数据预测耳的类型和大小的方法。该方法应用于一系列0.3和3毫米厚的冷轧和退火铝板，具有轧制和再结晶织构，以及这些的组合。结果表明，所提方法与拉深试验结果相近。得出的结论是，使用所提出的方法，可以仅根据{111}极图测量数据来表征铝板的耳形。