Micro and Macro Analysis of Anisotropy of an AA3104 Aluminum Alloy

Abstract

Anisotropy plays an important role when forming aluminum alloys. Measurement of anisotropy using traditional extensometers can be challenging when working with AA3104 alloys due to the presence of Piobert-Lüder's banding and the Portevin-Le Chatelier effect. Piobert-Lüder's bands creates large variations in r-value necessitating alternative analysis techniques. In the present work r-values obtained from digital image correlation are compared to viscoplastic self-consistent (VPSC) model predictions. The VPSC predictions are computed based on experimental texture measurements. Good correlation was obtained between the digital image correlation measured and crystal plasticity predicted r-values. The r-value results are assessed based on contribution of different crystallographic texture components.