Texture and High-Angle Boundary Formation during Deformation Processing

Abstract:

Among the phenomena leading to formation of high-angle boundaries during deformation processing at low homologous temperatures is the subdivision of prior grains and formation of deformation bands. Evidence for this phenomenon during processing of AA2004, a superplastic aluminum alloy, is reviewed; fragmentation of deformation bands leads to equiaxed grains and high-angle boundaries that support superplasticity. In addition to subdivision, groups of grains undergo lattice rotation toward one or the other variant of the β orientation fibers during plane-strain deformation of pure aluminum by ambient temperature rolling. The formation of equiaxed grains from banded structures during simple shear by equal channel angular pressing (ECAP) is also considered.

• Periodical: Materials Science Forum (Volumes 604-605)
• Pages: 251-258
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.604-605.251
• Online since: October 2008
• Authors: Terry R. McNelley, S. Swaminathan, J.Q. Su, Alex P. Zhilyaev
• Keywords: Deformation Banding, Deformation Processing, Severe Plastic Deformation (SPD), Texture, Texture Variants

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