Prediction of Earing of Cross‐Rolled Al Sheets from {h00} Pole Figures

Benke, Márton and Schweitzer, Bence and Hlavács, Adrienn and Mertinger, Valéria (2020) Prediction of Earing of Cross‐Rolled Al Sheets from {h00} Pole Figures. Metals, 10 (2). ISSN 2075-4701

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Abstract

The plastic anisotropy of rolled Al sheets is the result of a crystallographic texture. It leads to the formation of uneven cup heights during deep‐drawing, which is called earing. A new, simple and rapid method had been previously developed by the authors to predict earing directly from {h00} pole figures. In the present manuscript, this method is applied to cross‐rolling for the first time. 5056 type aluminum sheets were unidirectionally‐ (conventionally) and cross‐rolled from 4 to ~1 mm thickness in 6 or 12 passes. Earing was predicted from recalculated {200} pole figures obtained after X‐ray diffraction texture measurements. The results were validated by deep‐drawing tests. It is shown that the proposed method predicts the type (locations of ears) and magnitude of earing with satisfactory results. However, a different scaling factor must be used to calculate the magnitude of earing for cross‐rolling than for unidirectional rolling even if all other parameters (including cold rolling, texture measurements, and deep‐drawing) are the same. This is because the cross‐rolled sheets exhibit a similar type but weaker earing compared to the unidirectionally rolled samples.

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