Insights on activation enthalpy for non-Schmid slip in body-centered cubic metals

Hale, Lucas M.; Lim, Hojun; Zimmerman, Jonathan A.; Battaile, Corbett C.; Weinberger, Christopher R.

doi:10.1016/j.scriptamat.2014.11.035

Title: Insights on activation enthalpy for non-Schmid slip in body-centered cubic metals

Journal Article · Thu Dec 18 00:00:00 EST 2014 · Scripta Materialia

DOI:https://doi.org/10.1016/j.scriptamat.2014.11.035· OSTI ID:1141106

Hale, Lucas M. ^[1]; Lim, Hojun ^[2]; Zimmerman, Jonathan A. ^[1]; Battaile, Corbett C. ^[2]; Weinberger, Christopher R.

Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

We use insights gained from atomistic simulation to develop an activation enthalpy model for dislocation slip in body-centered cubic iron. Furthermore, using a classical potential that predicts dislocation core stabilities consistent with ab initio predictions, we quantify the non-Schmid stress-dependent effects of slip. The kink-pair activation enthalpy is evaluated and a model is identified as a function of the general stress state. Thus, our model enlarges the applicability of the classic Kocks activation enthalpy model to materials with non-Schmid behavior.

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Research Organization:: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC04-94AL85000

OSTI ID:: 1141106

Alternate ID(s):: OSTI ID: 1251508

Report Number(s):: SAND-2014-1895J; PII: S1359646214005089

Journal Information:: Scripta Materialia, Vol. 99, Issue C; ISSN 1359-6462

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 11 works

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Cited By (2)

Plastic anisotropy and dislocation trajectory in BCC metals Dezerald, Lucile; Rodney, David; Clouet, Emmanuel Nature Communications, Vol. 7, Issue 1 https://doi.org/10.1038/ncomms11695	journal	May 2016
Non-glide effects and dislocation core fields in BCC metals Kraych, Antoine; Clouet, Emmanuel; Dezerald, Lucile npj Computational Materials, Vol. 5, Issue 1 https://doi.org/10.1038/s41524-019-0247-3	journal	November 2019

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36 MATERIALS SCIENCE
dislocations
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iron

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