Prediction of earing of aluminium sheets from {h00} pole figures

Benke, Márton; Hlavacs, Adrienn; Piller, Imre; Mertinger, Valéria

doi:10.1016/j.euromechsol.2020.103950

Cited by 8 publications

(10 citation statements)

References 29 publications

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“…It is also worth noting that on the predicted relative cup height diagrams, small peaks are present in the 0 • + (n × 90 • ) directions as well besides the ears. This was observed in a previous work as well, and was used to follow the evolution of rolling earing to recrystallized earing [12]. Average earing calculated from measured cup heights and predicted average earing calculated from weighted {200} intensities of UD and CR samples are plotted in Figure 4a,b, respectively.…”

Section: Results Of 6 Pass Rollingmentioning

confidence: 69%

“…The applied earing prediction method is described in detail elsewhere [12]. Briefly, recalculated and complete {200} pole figures were obtained by texture analysis from the measured {111}, {200}, and {220} incomplete pole figures.…”

Section: Methodsmentioning

confidence: 99%

“…The applied blank holder force was 1 kN. Average earing was calculated as the ratio of average ear height and average cup height [12]. Predicted average earing was calculated similarly from the weighted {200} intensity curves and divided by a scaling factor.…”

Section: Methodsmentioning

confidence: 99%

“…Recently, a new, simple method has been developed by the authors to predict earing based on pole figure data [12]. The advantage of the method over others is that qualitative information can be obtained quickly and directly from pole figures.…”

Section: Ofmentioning

confidence: 99%

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

Benke

Schweitzer

Hlavacs

et al. 2020

Metals

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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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Section: Results Of 6 Pass Rollingmentioning

confidence: 69%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Ofmentioning

confidence: 99%

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

Benke

Schweitzer

Hlavacs

et al. 2020

Metals

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“…This becomes crucial if such sheet thickness is the target, where deep drawing cannot be carried out, thus, the method cannot be validated. A simple method has been published recently by the authors which is able to predict earing from {h00} pole figures [12,13]. Besides simplicity, the developed method can be applied in a wide sheet thickness range, which makes it a generally applicable method.…”

Section: Introductionmentioning

confidence: 99%

Earing Prediction of Unidirectionally and Cross-rolled, Annealed AW-5056 Al Sheets from {h00} Pole Figures

Schweitzer

Benke

Hlavacs

et al. 2020

Acta Materialia Transylvanica

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Earing of deep drawn cups is an effective measure of plastic anisotropy. It is the result of crystallographic anisotropy, i.e. texture. There are several methods to predict earing, but all of these methods are rather complex. Furthermore, above a certain sheet thickness, deep drawing cannot be performed, and prediction methods fail since they are usually valid within a certain sheet thickness range. A new, simple method has been proposed to predict earing. Besides simplicity, another major benefit of the method is that it can be applied to a wide range of sheet thicknesses. The method has been previously applied for unidirectionally rolled and recrystallized and cross-rolled Al sheets. In the present manuscript, the proposed method is applied on the AW-5056 type, unidirectionally and cross-rolled, then annealed Al sheets having very weak (close to random) structure. It is shown that for such samples, the method predicts negligible earing. It is also revealed that for the 5056 type Al alloy, the differences in texture and earing between unidirectionally and cross-rolled samples become so small after annealing, that the benefit of cross rolling is negligible.

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