Glide dislocation nucleation from dislocation nodes at semi-coherent {111} Cu–Ni interfaces
Abstract
Using atomistic simulations and dislocation theory on a model system of semi-coherent {1 1 1} interfaces, we show that misfit dislocation nodes adopt multiple atomic arrangements corresponding to the creation and redistribution of excess volume at the nodes. We identified four distinctive node structures: volume-smeared nodes with (i) spiral or (ii) straight dislocation patterns, and volume-condensed nodes with (iii) triangular or (iv) hexagonal dislocation patterns. Volume-smeared nodes contain interfacial dislocations lying in the Cu–Ni interface but volume-condensed nodes contain two sets of interfacial dislocations in the two adjacent interfaces and jogs across the atomic layer between the two adjacent interfaces. Finally, under biaxial tension/compression applied parallel to the interface, we show that the nucleation of lattice dislocations is preferred at the nodes and is correlated with the reduction of excess volume at the nodes.
- Authors:
-
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Materials Science and Technology Division
- Univ. of Nebraska, Lincoln, NE (United States). Dept. of Mechanical and Materials Engineering
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Theoretical Division
- Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Materials Science and Engineering
- Publication Date:
- Research Org.:
- Energy Frontier Research Centers (EFRC) (United States). Center for Materials at Irradiation and Mechanical Extremes (CMIME); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1329583
- Alternate Identifier(s):
- OSTI ID: 1251481
- Report Number(s):
- LA-UR-15-21602
Journal ID: ISSN 1359-6454
- Grant/Contract Number:
- AC52-06NA25396; 2008LANL1026: LDRD-ER20140450; 2008LANL1026; LDRD-ER20140450
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Acta Materialia
- Additional Journal Information:
- Journal Volume: 98; Journal Issue: C; Journal ID: ISSN 1359-6454
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Atomistic simulations; Dislocation; Interface; Nucleation
Citation Formats
Shao, Shuai, Wang, Jian, Beyerlein, Irene J., and Misra, Amit. Glide dislocation nucleation from dislocation nodes at semi-coherent {111} Cu–Ni interfaces. United States: N. p., 2015.
Web. doi:10.1016/j.actamat.2015.07.044.
Shao, Shuai, Wang, Jian, Beyerlein, Irene J., & Misra, Amit. Glide dislocation nucleation from dislocation nodes at semi-coherent {111} Cu–Ni interfaces. United States. https://doi.org/10.1016/j.actamat.2015.07.044
Shao, Shuai, Wang, Jian, Beyerlein, Irene J., and Misra, Amit. Thu .
"Glide dislocation nucleation from dislocation nodes at semi-coherent {111} Cu–Ni interfaces". United States. https://doi.org/10.1016/j.actamat.2015.07.044. https://www.osti.gov/servlets/purl/1329583.
@article{osti_1329583,
title = {Glide dislocation nucleation from dislocation nodes at semi-coherent {111} Cu–Ni interfaces},
author = {Shao, Shuai and Wang, Jian and Beyerlein, Irene J. and Misra, Amit},
abstractNote = {Using atomistic simulations and dislocation theory on a model system of semi-coherent {1 1 1} interfaces, we show that misfit dislocation nodes adopt multiple atomic arrangements corresponding to the creation and redistribution of excess volume at the nodes. We identified four distinctive node structures: volume-smeared nodes with (i) spiral or (ii) straight dislocation patterns, and volume-condensed nodes with (iii) triangular or (iv) hexagonal dislocation patterns. Volume-smeared nodes contain interfacial dislocations lying in the Cu–Ni interface but volume-condensed nodes contain two sets of interfacial dislocations in the two adjacent interfaces and jogs across the atomic layer between the two adjacent interfaces. Finally, under biaxial tension/compression applied parallel to the interface, we show that the nucleation of lattice dislocations is preferred at the nodes and is correlated with the reduction of excess volume at the nodes.},
doi = {10.1016/j.actamat.2015.07.044},
journal = {Acta Materialia},
number = C,
volume = 98,
place = {United States},
year = {Thu Jul 23 00:00:00 EDT 2015},
month = {Thu Jul 23 00:00:00 EDT 2015}
}
Web of Science
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