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Evolution of Austenite Dislocation Density During Hot Deformation Using a Physical Dynamic Recrystallization Model

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Proceedings of the 3rd Pan American Materials Congress

Part of the book series: The Minerals, Metals & Materials Series ((MMMS))

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Abstract

A new model to predict the dislocation density evolution of 30Cr2Ni4MoV steel during hot deformation was proposed in this study. Hot compression of 30Cr2Ni4MoV steel was carried out on Gleeble 1500 at different temperatures and strain rates. A series of flow curves was obtained and the experimental dislocation density evolution was derived from the experimental flow curves. Based on the obtained flow curves, the dependences of yield stress, critical stress and strain of dynamic recrystallization and the saturation stress on temperature and strain rate were determined. Two sets of dislocation density equation were derived from the experimental flow curves: (I) a dislocation density relation describing the grains in which dynamic recovery took place only; and (II) an average dislocation density expression pertaining to the recrystallized grains. All the parameters needed for the determination of the dislocation equations were calculated and expressed as a function of strain, temperature and strain rate. A physically realistic and practical kinetics model of dynamic recrystallization was determined with the aid of the above relations. Finally, the dependence of the dislocation density on strain, deformation temperature and strain rate was determined and the predicted results agreed well with the experimental results.

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Acknowledgements

The authors gratefully acknowledge financial support from National Basic Research Program of China (2011CB012903).

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Authors and Affiliations

  1. Department of Mechanical Engineering, Tsinghua University, Bei**g, 100084, China

    Peng Zhou & Qingxian Ma

Authors
  1. Peng Zhou
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  2. Qingxian Ma
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Corresponding author

Correspondence to Qingxian Ma .

Editor information

Editors and Affiliations

  1. Dept. of Nanoengineering, MC 0448, University of California-San Diego Dept. of Nanoengineering, MC 0448, LA JOLLA, California, USA

    Marc André Meyers

  2. ESFM-IPN , Mexico City, Mexico

    Hector Alfredo Calderon Benavides

  3. UTN-National University of Technology , Buenos Aires, Argentina

    Sonia P Brühl

  4. Universidad de Antioquia , Medellín, Colombia

    Henry A Colorado

  5. Pratt & Whitney Canada , Longueuil, Canada

    Elvi Dalgaard

  6. Military Institute of Engineering , Rio de Janerio, Brazil

    Carlos Nelson Elias

  7. Universidade Federal de Minas Gerais , Belo Horizonte, Brazil

    Roberto B Figueiredo

  8. Ternium Mexico , Nuevo León, Mexico

    Omar Garcia-Rincon

  9. Division of Materials Sci & Engg, Hanyang University Division of Materials Sci & Engg, Seoul, Korea (Republic of)

    Megumi Kawasaki

  10. Dept. Engineering & the Environment, University of Southampton Dept. Engineering & the Environment, Southampton, United Kingdom

    Terence G. Langdon

  11. University of Concepción , Concepción, Chile

    R.V. Mangalaraja

  12. Universidad Nacional de Ingeniería , Lima, Peru

    Mery Cecilia Gomez Marroquin

  13. Federal University of Rio de Janeiro , Rio de Janeiro, Brazil

    Adriana da Cunha Rocha

  14. Dept Chemical Engg & Sci, University of California, Irvine Dept Chemical Engg & Sci, Irvine, California, USA

    Julie M Schoenung

  15. Universidade Federal Fluminense , Niterói, Brazil

    Andre Costa e Silva

  16. Mechanical Engineering, University of Waterloo Mechanical Engineering, WATERLOO, Ontario, Canada

    Mary Wells

  17. ETH Zurich , Zürich, Switzerland

    Wen Yang

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Zhou, P., Ma, Q. (2017). Evolution of Austenite Dislocation Density During Hot Deformation Using a Physical Dynamic Recrystallization Model. In: Meyers, M., et al. Proceedings of the 3rd Pan American Materials Congress. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-52132-9_71

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