Paper Title:
High Temperature Deformation Behavior of Pre-Sintered Al-10Si-5Fe Based Alloy
  Abstract

The mechanical properties of pre-sintered Al-10Si-5Fe-1Cu-0.5Mg-1Zr (wt%) alloy were investigated in the temperature range from 673K to 813K and at initial strain rates from 10-4 to 100 s-1. In the high temperature range of 793K and 813K, the strain rate sensitivity index was close to that for superplasticity (0.3). Stress exponent was estimated to be 2 and 5 in the temperature range from 793K to 813K and from 673K to 773K, respectively. The activation energies for the plastic flow were calculated to 77kJ/mol for the n=2 region and 127kJ/mol for the n=5 region. These values were close to that for grain boundary diffusion and self-diffusion in pure aluminum, respectively. We found that a dynamic recrystallization (DRX) and grain boundary sliding (GBS) occur depending on the test temperature and stain rate. A filament-like phase containing Cu and Mg was observed in the cracked surface of the specimen deformed at 793K and 813K.

  Info
Periodical
Materials Science Forum (Volumes 510-511)
Edited by
Hyung Sun Kim, Yu Bao Li and Soo Wohn Lee
Pages
342-345
DOI
10.4028/www.scientific.net/MSF.510-511.342
Citation
D. S. Lee, T. K. Jung, G.-S. Shim, M. S. Kim, W. Y. Kim, H. Yamagata, "High Temperature Deformation Behavior of Pre-Sintered Al-10Si-5Fe Based Alloy", Materials Science Forum, Vols. 510-511, pp. 342-345, 2006
Online since
March 2006
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$32.00
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