Texture and High-Angle Boundary Formation during Deformation Processing

Abstract:

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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.

Info:

Periodical:

Materials Science Forum (Volumes 604-605)

Edited by:

Marcello Cabibbo and Stefano Spigarelli

Pages:

251-258

DOI:

10.4028/www.scientific.net/MSF.604-605.251

Citation:

T. R. McNelley et al., "Texture and High-Angle Boundary Formation during Deformation Processing", Materials Science Forum, Vols. 604-605, pp. 251-258, 2009

Online since:

October 2008

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Price:

$35.00

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