Dislocation Dynamics modeling of the interaction of dislocations with Eshelby inclusions [Book Chapter]

Aubry, Silvie; Queyreau, Sylvain; Arsenlis, Athanasios

doi:10.1002/9781119687566.ch3

Dislocation Dynamics modeling of the interaction of dislocations with Eshelby inclusions [Book Chapter]

Book · Wed Dec 18 04:00:00 EST 2019

DOI:https://doi.org/10.1002/9781119687566.ch3· OSTI ID:1605524

Aubry, Silvie ^[1]; Queyreau, Sylvain ^[2]; Arsenlis, Athanasios ^[1]

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Univ. Paris XIII Nord (France)

Materials properties are strongly influenced by their microstructures at the mesoscale. Although dislocations-line defects present in crystalline materials, are key to control materials' strain hardening during plastic deformation, the presence of defects other than dislocations, such as second phase precipitates and inclusions, can dramatically influence the strength of the materials. The plastic response of metals in the presence of helium (He) bubbles is a complex interplay between dislocations and He bubbles. This chapter discusses a closed form integration of the Eshelby stress field along dislocation lines, which is essential to large-scale dislocation dynamics (DD) simulations of the strengthening induced by Eshelby inclusions. Next, it reviews the existing DD approaches and investigations of particle strengthening. Finally, the chapter presents the derivation of the Eshelby forces and implementation in a DD code and demonstrates the efficiency of the proposed modeling through massive simulations involving fully 3-D microstructures and thousands of Eshelby inclusions.

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Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); US Army Research Laboratory (USARL)

DOE Contract Number:: AC52-07NA27344

OSTI ID:: 1605524

Report Number(s):: LLNL-JRNL--780040; 973574; ISBN: 9781786305312

Country of Publication:: United States

Language:: English

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Related Subjects

36 MATERIALS SCIENCE
3‐D microstructures
Eshelby inclusions
crystalline materials
dislocation dynamics modeling
helium bubbles
plastic deformation

Dislocation Dynamics modeling of the interaction of dislocations with Eshelby inclusions [Book Chapter]

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