Dynamic Transformation and Retransformation During the Simulated Plate Rolling of an X70 Pipeline Steel

  • Samuel F. RodriguesEmail author
  • Clodualdo AranasJr
  • Fulvio Siciliano
  • John J. Jonas
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)


The controlled rolling of pipeline steels involves pancaking the austenite and then subjecting it to accelerated cooling. However, the formation of ferrite during rolling decreases the amount of austenite available for microstructure control. Here the formation of ferrite during rolling is simulated using a five-pass rolling schedule applied by means of torsion testing. The first and last pass temperatures were 920 and 860 °C with 15° of cooling between passes. All of the rolling was carried out above the Ae3 temperature of 845 °C that applies to this steel. Interpass times of 10 and 30 s were employed, which corresponded to cooling rates of 1.5 and 0.5 °C/s, respectively. Samples were quenched before and after the first, third, and fifth passes in order to determine the amount of dynamic ferrite produced in a given pass. The amounts of dynamic ferrite formed and retained increased with pass number. The amounts of ferrite that retransformed increased with pass number. The simulations indicate that ferrite is unavoidably produced during plate rolling and that the microstructures present at the initiation of accelerated cooling do not consist solely of austenite.


Dynamic transformation Plate rolling X70 pipeline steel 



The authors acknowledge with gratitude funding received from the Brazilian National Council for Scientific and Technological Development (SFR), the McGill Engineering Doctoral Award (MEDA) program (CAJr), and the Natural Sciences and Engineering Research Council of Canada (JJJ).


  1. 1.
    Ghosh, C., Aranas, C., & Jonas, J. J. (2016). Dynamic transformation of deformed austenite at temperatures above the Ae3. Progress in Materials Science, 82, 151–233.CrossRefGoogle Scholar
  2. 2.
    Grewal, R., Aranas, C., Jr., Chadha, K., Shahriari, D., Jahazi, M., & Jonas, J. J. (2016). Formation of Widmanstätten ferrite at very high temperatures in the austenite phase field. Acta Materialia, 109, 23–31.CrossRefGoogle Scholar
  3. 3.
    Matsumura, Y., & Yada, H. (1987). Evolution deformation of ultrafine-grained ferrite in hot successive deformation. Transactions ISIJ, 27, 492–498.CrossRefGoogle Scholar
  4. 4.
    Yada, H. H., Matsumura, T., & Senuma, T. (1988). Proceedings of International Conference on Physical Metallurgy of Themomechanical Processing of Steels and Other Metals, ISIJ, THERMEC (vol. 88, pp 200–207).Google Scholar
  5. 5.
    Yada, H., Li, C. M., & Yamagata, H. (2000). Dynamic γ → α transformation during hot deformation in iron-nickel-carbon alloys. ISIJ International, 40, 200–206.CrossRefGoogle Scholar
  6. 6.
    Basabe, V. V., Jonas, J. J., & Ghosh, C. (2014). Formation of Widmanstätten ferrite in a 0.036% Nb low carbon steel at temperatures above the Ae3. Steel Research International, 85, 8–15.CrossRefGoogle Scholar
  7. 7.
    Aranas, C., Jr., Rodrigues, S., Grewal, R., & Jonas, J. J. (2015). Ferrite formation above the Ae3 temperature during the torsion simulation of strip rolling. ISIJ International, 55, 2426–2434.CrossRefGoogle Scholar
  8. 8.
    Rodrigues, S. F., Aranas, C. Jr., Wang, T., & Jonas, J. J. (2017, In press) Dynamic transformation of an X70 steel under plate rolling conditions. ISIJ International, 57, 162–169.Google Scholar
  9. 9.
    Aranas, C. Jr., Jung, I. H., Yue, S., Rodrigues, S. F., & Jonas, J. J. (2016). A metastable phase diagram for the dynamic transformation of austenite at temperatures above the Ae3 . International Journal of Materials Research, 107, 881–886.Google Scholar
  10. 10.
    Tong, M., Li, D., Li, Y., Ni, J., & Zang, Y. (2004). Monte Carlo-method simulation of the deformation-induced ferrite transformation in the Fe-C system. Metallurgical and Materials Transactions A, 35, 1565–1577.CrossRefGoogle Scholar
  11. 11.
    Hanlon, D. N., Sietsma, J., & Zwaag, S. (2001). The effect of plastic deformation of austenite on the kinetics of subsequent ferrite formation. ISIJ International, 41, 1028–1036.CrossRefGoogle Scholar
  12. 12.
    Sun, X., Luo, H., Dong, H., Liu, Q., & Weng, Y. (2008). Microstructural evolution and kinetics for post-dynamic transformation in a plain low carbon steel. ISIJ International, 48, 994–1000.CrossRefGoogle Scholar

Copyright information

© The Minerals, Metals & Materials Society 2017

Authors and Affiliations

  • Samuel F. Rodrigues
    • 1
    • 2
    Email author
  • Clodualdo AranasJr
    • 1
  • Fulvio Siciliano
    • 3
  • John J. Jonas
    • 1
  1. 1.Department of Materials EngineeringMcGill UniversityMontrealCanada
  2. 2.Federal Institute of EducationScience and Technology of MaranhaoSão Francisco, São LuísBrazil
  3. 3.Dynamic Systems Inc.PoestenkillUSA

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