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Discrete Dislocation Dynamics Simulations of Irradiation Hardening in Nuclear Materials

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Handbook of Materials Modeling

Abstract

Neutron irradiation can severely impact the mechanical behavior of nuclear structural materials. Irradiation introduces a high density of nanometric defects that block dislocation motion and result in hardening and a loss of ductility often associated with the onset of localized plastic flow in a highly heterogeneous manner. In our hierarchy of numerical methods used to understand and quantify mechanical property degradation under irradiation, discrete dislocation dynamics (DD) provides a window into the time and length scales where critical interactions between dislocations and defects occur. In the present chapter, we discuss the current state of the art of DD simulations applied to irradiation scenarios, introducing the theoretical models devised to deal with dislocation-defect interactions, crystal structure particularities, and the most salient aspects of several highlighted applications. We also discuss current limitations and what new understanding has been gained vis-a-vis serviceable nuclear materials using these techniques.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Department of Mechanical and Aerospace Engineering, University of California Los Angeles, Los Angeles, CA, USA

    Jaime Marian

  2. School of Mathematics, University of Leeds, Leeds, UK

    Steve Fitzgerald

  3. Department of Mechanical and Aerospace Engineering, University of California Los Angeles, Los Angeles, CA, USA

    Giacomo Po

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  1. Jaime Marian
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  2. Steve Fitzgerald
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  3. Giacomo Po
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Correspondence to Jaime Marian .

Editor information

Editors and Affiliations

  1. Institute of Physics, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland

    Wanda Andreoni

  2. Department of Nuclear Science & Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA

    Sidney Yip

Section Editor information

  1. Reactor Materials and Mechanical Design, Pacific Northwest National Laboratory, Richland, WA, USA

    Ram Devanathan

  2. Materials Science and Engineering, University of California Los Angeles, Los Angeles, California, USA

    Jaime Marian

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Marian, J., Fitzgerald, S., Po, G. (2018). Discrete Dislocation Dynamics Simulations of Irradiation Hardening in Nuclear Materials. In: Andreoni, W., Yip, S. (eds) Handbook of Materials Modeling. Springer, Cham. https://doi.org/10.1007/978-3-319-50257-1_121-1

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