Paper Title:
Ferrite Formation Above the Ae3 in a Medium-Carbon Steel
  Abstract

A 0.45% C steel was deformed in torsion over the temperature range 762-872°C in a 5%H2-Ar gas atmosphere. Strains of 0.25-3.0 were applied at a strain rate of ε. = 4 s-1. The experimental parameters were varied in order to study the effects of strain and temperature on the formation of ferrite by dynamic transformation (DT) at temperatures above the Ae3. The critical strain for ferrite formation by DT was about 0.2 and its volume fraction increased with strain. The average ferrite grain sizes were about 1 to 2 µm and were fairly independent of temperature. It was observed that the deformation-induced ferrite remained fairly stable during 800 s of isothermal holding. In general, the experiments showed that DT takes place at temperatures above the Ae3 and that the reverse static transformation is much slower than the forward dynamic transformation.

  Info
Periodical
Solid State Phenomena (Volumes 172-174)
Edited by
Yves Bréchet, Emmanuel Clouet, Alexis Deschamps, Alphonse Finel and Frédéric Soisson
Pages
372-377
DOI
10.4028/www.scientific.net/SSP.172-174.372
Citation
J. J. Jonas, V. V. Basabe, "Ferrite Formation Above the Ae3 in a Medium-Carbon Steel", Solid State Phenomena, Vols. 172-174, pp. 372-377, 2011
Online since
June 2011
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Price
$32.00
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