Correlation between crystallographic texture and electrochemical behavior of nano/ultrafine-grained AA2024 alloy processed by accumulative roll bonding process

This study provides an insight into the correlation between crystallographic texture and electrochemical behavior of nano/ultrafine-grained AA2024 alloy. To achieve this objective, the following AA2024 alloys were processed by accumulative roll bonding (ARB): (i) Nano/ ultrafine-grained AA2024 alloy with virtually the same grain size and the texture components of S {123}(634), Cube {001}(100), Copper {112}(111), and Brass {011}(211), and (ii) Bimodal-grained structure AA2024 alloy consisting of coarse and ultrafine elongated grains and the texture components of S {123}(634) and Brass {011}(211). The results indicated that the grain refinement increases the corrosion current density and decreases the passive film resistance of AA2024 alloy in quiescent phosphate buffer solution (pH 1/4 9). Overall, electrochemical studies revealed that the uniform distribution of grain size and development of Cube {001}(100) and Copper {112}(111) texture components provide the most advantageous electrochemical properties. Hence, it was suggested that nano/ultrafine-grained structure was preferred compared to bimodal grain structure. (c) 2022 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

Automated summary

This study provides insights into the relationship between crystallographic texture and electrochemical behavior of nano/ultrafine-grained AA2024 alloy. The results indicate that grain refinement increases the corrosion current density and decreases the passive film resistance of the alloy.