Paper Title:
Grain Refinement of High-Purity FCC Metals Using Equal-Channel Angular Pressing
  Abstract

Equal-channel angular pressing (ECAP) is a valuable technique for refining grain sizes to the submicrometer or the nanometer range. This study explores the reason for the difference in the grain refining behavior between pure Al and pure Cu. First, very high purity levels were adopted in order to minimize any effects of impurities: 99.999% for Al and 99.99999% for Cu. Second, high purity (99.999%) Au was also used in order to examine the effect of stacking fault energy. All three pure metals were subjected to ECAP and microstructural observations and hardness measurements were undertaken with respect to the number of ECAP passes. It is concluded that the stacking fault energy plays an important role and accounts for the difference in the grain refining behavior in the ECAP process.

  Info
Periodical
Materials Science Forum (Volumes 558-559)
Edited by
S.-J.L. Kang, M.Y. Huh, N.M. Hwang, H. Homma, K. Ushioda and Y. Ikuhara
Pages
1273-1278
DOI
10.4028/www.scientific.net/MSF.558-559.1273
Citation
Z. Horita, K. Kishikawa, K. Kimura, K. Tatsumi, T. G. Langdon, "Grain Refinement of High-Purity FCC Metals Using Equal-Channel Angular Pressing", Materials Science Forum, Vols. 558-559, pp. 1273-1278, 2007
Online since
October 2007
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Price
$32.00
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