Paper Title:
Serration Phenomenon in High Purity Chromium
  Abstract

Serration phenomenon of sintered and cast chromium was investigated by means of tension test at various strain rates. With increasing test temperature, tensile strength decreased gradually at first and showed a minimum at a certain temperature. Above this temperature, the strength continued to increase to a maximum value. Serrated flow appeared between the temperatures of the minimum and maximum tensile strengths. Tensile ductility minimum was also observed around the temperature of the maximum tensile strength. Relation between the strain rate and the temperature T of the maximum tensile strength could be well described by an Arrhenius equation. Activation energy of 101.3kJ/mol found in the present study is in good agreement with the activation energy for diffusion of nitrogen atom in chromium.

  Info
Periodical
Materials Science Forum (Volumes 449-452)
Edited by
S.-G. Kang and T. Kobayashi
Pages
269-272
DOI
10.4028/www.scientific.net/MSF.449-452.269
Citation
Y. Harada, M. Ohmori, L. Wang, "Serration Phenomenon in High Purity Chromium", Materials Science Forum, Vols. 449-452, pp. 269-272, 2004
Online since
March 2004
Export
Price
$35.00
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