RELEVANCE OF COLD-ROLLING TECHNOLOGY FOR THE TEXTURE AND ANISOTROPY OF EN AW-8011A ALUMINUM ALLOYS

Author:

Kraner Jakob,Kim Kyung Il,Kim Bonghwan,Kim Shae K.,Paulin Irena

Abstract

The combined effects of the reduction ratio and annealing conditions during cold rolling were investigated for the texture and anisotropy of an EN AW-8011A aluminium alloy. To characterize the microstructural and textural differences, a scanning electron microscope with electron back-scattered diffraction was used. To achieve low anisotropy, the three key factors of texture were exposed: a low fraction of deformed grains according to the average grain misorientation, a large amount of random texture components and the equivalent ratio between deformed and recrystallised texture components. The results of crystallographic texture analysis and anisotropy values revealed that the higher ratio of total cold deformation (cold rolling reduction) and the higher ratio of cold deformation after the intermediate annealing were more favourable for the final continuous annealing in terms of decreasing anisotropy. In contrast, the lower ratio of the cold deformation resulted in lower anisotropy when implementing batch annealing.

Publisher

Institute of Metals and Technology

Subject

Metals and Alloys,Polymers and Plastics

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