A 3D phase field dislocation dynamics model for body-centered cubic crystals
Journal Article
·
· Computational Materials Science
- Carnegie Mellon Univ., Pittsburgh, PA (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Univ. of California, Santa Barbara, CA (United States)
In this work, we present a 3D Phase Field Dislocation Dynamics (PFDD) model for body-centered cubic (BCC) metals. The model formulation is extended to account for the dependence of the Peierls barrier on the line-character of the dislocation. Simulations of the expansion of a dislocation loop belonging to {110} < 111 > the slip system are presented with direct comparison to Molecular Statics (MS) simulations. The extended PFDD model is able to capture the salient features of dislocation loop expansion predicted by MS simulations. In conclusion, the model is also applied to simulate the motion of a straight screw dislocation through kink-pair motion.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE Laboratory Directed Research and Development (LDRD) Program
- Grant/Contract Number:
- 89233218CNA000001
- OSTI ID:
- 1565909
- Alternate ID(s):
- OSTI ID: 1560905
- Report Number(s):
- LA-UR-19-24421; TRN: US2000943
- Journal Information:
- Computational Materials Science, Vol. 171, Issue C; ISSN 0927-0256
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 25 works
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