Paper Title:
Nanocrystallization and Dissolution of Immiscible Powder Alloys Using High Pressure Torsion
  Abstract

Precompacts out of immiscible systems CuCr (75/25 wt%) and WCu (80/20 wt%), respectively, were made by pressing mixed powders and sintering. By applying different strains and hydrostatic pressures of HPT at room temperature, disc-shaped samples with a diameter of 8 mm were produced. They were investigated by Light Microscopy, Scanning-Electron Microscopy using Back-Scattered Electrons, and X-ray Line Profile Analysis. In addition, Vickers microhardness data were collected. Both systems showed the highest microhardness at a shear strain of about γ = 170. The density (for the case of Cu25Cr) of the consolidated material could be increased to the theoretical value. Microhardness and grain sizes were studied individually for each of the phases, too.

  Info
Periodical
Materials Science Forum (Volumes 667-669)
Edited by
Jing Tao Wang, Roberto B. Figueiredo and Terence G. Langdon
Pages
151-156
DOI
10.4028/www.scientific.net/MSF.667-669.151
Citation
S. Kahofer, M. Zehetbauer, H. Danninger, E. Schafler, M. Kerber, J. Horky, "Nanocrystallization and Dissolution of Immiscible Powder Alloys Using High Pressure Torsion", Materials Science Forum, Vols. 667-669, pp. 151-156, 2011
Online since
December 2010
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