Evolution of microstructure and texture in an ultrafine-grained Al6082 alloy during severe plastic deformation

Chowdhury, Sandip Ghosh and Mondal, Amit and Gubicza, Jenő and Krállics, György and Fodor, Árpád (2008) Evolution of microstructure and texture in an ultrafine-grained Al6082 alloy during severe plastic deformation. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCURE AND PROCESSING, 490 (1-2). pp. 335-342. ISSN 0921-5093

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Abstract

The evolution of microstructure and texture in A16082 precipitation-hardened alloy during equal-channel angular pressing (ECAP) was studied. It was found that although the dislocation density and the subgrain size saturated after 1 pass, the size of grains bounded by high angle boundaries reached its minimum value only after 4 passes. Furthermore, the grain orientation distribution changes between 4 and 8 passes, indicating the development of grain boundary structure even after the saturation of the parameters of the microstructure. As a result of this evolution, the initial texture of the commercial alloy was diminished after 8 passes and the grain orientation distribution became to be close to random case.

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