Paper Title:
Reversal Straining to Manage Structure in Pure Aluminum under SPD
  Abstract

All the SPD techniques introduce reversal straining principally, but effects of the reversal deformation on structure evolution were not studied directly yet. In the present work, an attempt was made to manage structure in pure (99.99%) Al by strain reversal through high pressure torsion (HPT). Total accumulated deformation up to equivalent strain ~8 was used. General trend of the grain refinement is similar for both deformation modes; and it is typical with all other SPD processed FCC metals. At the same time, the difference in microstructure evolution at the vicinity of the specimen axis and with increasing distance in the radial direction introduces microstructural heterogeneities which are specific features of the reversal straining. In the monotonic deformation process the A ({111}<011>) fiber is gradually substituted by the C component ({ 0 0 1}< 1 1 0>) with increasing strain before it is found to weaken. In the reverse straining process the A fiber is found to dominate the deformation texture in the low strain region. In the reverse straining process at high strain level, a {001}<100> component appear.

  Info
Periodical
Materials Science Forum (Volumes 584-586)
Edited by
Yuri Estrin and Hans Jürgen Maier
Pages
133-138
DOI
10.4028/www.scientific.net/MSF.584-586.133
Citation
D. Orlov, P. P. Bhattacharjee, Y. Todaka, M. Umemoto, N. Tsuji, "Reversal Straining to Manage Structure in Pure Aluminum under SPD", Materials Science Forum, Vols. 584-586, pp. 133-138, 2008
Online since
June 2008
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