Paper Title:
Dynamic Recrystallization of Ferrite in Low Carbon Steels
  Abstract

Dynamic recrystallization(DRX) of ferrite in low carbon steels was investigated by hot compression tests at temperatures of 550 to 700oC at strain rates of 0.001 to 10s-1. The results indicate that DRX of ferrite can occur in low carbon steels and lead to grain refinement. With increasing Zener-Hollomon parameter Z, its mechanism changes from discontinuous dynamic recrystallization to continuous dynamic recrystallization, the turning point is approximately at Z=1×1016s-1 for a low carbon steel with 0.171wt% C. The results also indicate that changing the minor constituents of the low carbon steel from pearlite colonies to fine cementite particles has an effect on promoting DRX of ferrite, and the increase of Mn content and the presence of tiny Nb precipitates have opposite effects respectively. However, all these changes are of benefit to the refinement of recrystallized grains.

  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
617-622
DOI
10.4028/www.scientific.net/MSF.558-559.617
Citation
Z. Q. Sun, L. F. Li, W. Y. Yang, "Dynamic Recrystallization of Ferrite in Low Carbon Steels", Materials Science Forum, Vols. 558-559, pp. 617-622, 2007
Online since
October 2007
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Price
$32.00
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