Paper Title:
Formation of Nanostructure during High-Pressure Torsion of Al-Zn, Al-Mg and Al-Zn-Mg Alloys
  Abstract

Structure and phase composition of binary Al–Zn, Al–Mg and ternary Al–Zn–Mg alloys were studied before and after high pressure torsion (HPT) with shear strain 300. The size of (Al) grains and crystals of reinforcing second phases decreases drastically after HPT reaching nanometer range. As a result of HPT, the Zn-rich (Al) supersaturated solid solution decomposes completely and reaches the equilibrium state corresponding to room temperature. The decomposition is less pronounced for Al–Mg and Al–Zn–Mg alloys. We conclude that the severe plastic deformation of supersaturated solid solutions can be considered as a balance between deformation-induced disordering and deformation-accelerated diffusion towards the equilibrium state.

  Info
Periodical
Defect and Diffusion Forum (Volumes 237-240)
Edited by
M. Danielewski, R. Filipek, R. Kozubski, W. Kucza, P. Zieba, Z. Zurek
Pages
739-744
DOI
10.4028/www.scientific.net/DDF.237-240.739
Citation
A.A. Mazilkin, O. A. Kogtenkova, B. B. Straumal, R. Valiev, B. Baretzky, "Formation of Nanostructure during High-Pressure Torsion of Al-Zn, Al-Mg and Al-Zn-Mg Alloys", Defect and Diffusion Forum, Vols. 237-240, pp. 739-744, 2005
Online since
April 2005
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$32.00
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