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Goryaeva AM, Domain C, Chartier A, Dézaphie A, Swinburne TD, Ma K, Loyer-Prost M, Creuze J, Marinica MC. Compact A15 Frank-Kasper nano-phases at the origin of dislocation loops in face-centred cubic metals. Nat Commun 2023; 14:3003. [PMID: 37230966 DOI: 10.1038/s41467-023-38729-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Accepted: 05/12/2023] [Indexed: 05/27/2023] Open
Abstract
It is generally considered that the elementary building blocks of defects in face-centred cubic (fcc) metals, e.g., interstitial dumbbells, coalesce directly into ever larger 2D dislocation loops, implying a continuous coarsening process. Here, we reveal that, prior to the formation of dislocation loops, interstitial atoms in fcc metals cluster into compact 3D inclusions of A15 Frank-Kasper phase. After reaching the critical size, A15 nano-phase inclusions act as a source of prismatic or faulted dislocation loops, dependent on the energy landscape of the host material. Using cutting-edge atomistic simulations we demonstrate this scenario in Al, Cu, and Ni. Our results explain the enigmatic 3D cluster structures observed in experiments combining diffuse X-ray scattering and resistivity recovery. Formation of compact nano-phase inclusions in fcc structure, along with previous observations in bcc structure, suggests that the fundamental mechanisms of interstitial defect formation are more complex than historically assumed and require a general revision. Interstitial-mediated formation of compact 3D precipitates can be a generic phenomenon, which should be further explored in systems with different crystallographic lattices.
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Affiliation(s)
- Alexandra M Goryaeva
- Université Paris-Saclay, CEA, Service de recherche en Corrosion et Comportement des Matériaux, SRMP, Gif-sur-Yvette, 91191, France.
| | - Christophe Domain
- EDF-R&D, Département Matériaux et Mécanique des Composants (MMC), Les Renardieres, Moret sur Loing Cedex, F-77818, France
| | - Alain Chartier
- Université Paris-Saclay, CEA, Service de recherche en Corrosion et Comportement des Matériaux, Gif-sur-Yvette, 91191, France
| | - Alexandre Dézaphie
- Université Paris-Saclay, CEA, Service de recherche en Corrosion et Comportement des Matériaux, SRMP, Gif-sur-Yvette, 91191, France
- Université Paris-Saclay, ICMMO/SP2M, UMR 8182, Orsay, 91405, France
| | - Thomas D Swinburne
- Aix-Marseille Université, CNRS, CINaM UMR 7325, Campus de Luminy, Marseille, 13288, France
| | - Kan Ma
- Université Paris-Saclay, CEA, Service de recherche en Corrosion et Comportement des Matériaux, SRMP, Gif-sur-Yvette, 91191, France
- School of Metallurgy and Materials, University of Birmingham, Birmingham, B15 2TT, UK
| | - Marie Loyer-Prost
- Université Paris-Saclay, CEA, Service de recherche en Corrosion et Comportement des Matériaux, SRMP, Gif-sur-Yvette, 91191, France
| | - Jérôme Creuze
- Université Paris-Saclay, ICMMO/SP2M, UMR 8182, Orsay, 91405, France
| | - Mihai-Cosmin Marinica
- Université Paris-Saclay, CEA, Service de recherche en Corrosion et Comportement des Matériaux, SRMP, Gif-sur-Yvette, 91191, France.
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Mason DR, Das S, Derlet PM, Dudarev SL, London AJ, Yu H, Phillips NW, Yang D, Mizohata K, Xu R, Hofmann F. Observation of Transient and Asymptotic Driven Structural States of Tungsten Exposed to Radiation. PHYSICAL REVIEW LETTERS 2020; 125:225503. [PMID: 33315460 DOI: 10.1103/physrevlett.125.225503] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 09/24/2020] [Accepted: 10/02/2020] [Indexed: 06/12/2023]
Abstract
Combining spatially resolved x-ray Laue diffraction with atomic-scale simulations, we observe how ion-irradiated tungsten undergoes a series of nonlinear structural transformations with increasing radiation exposure. Nanoscale defect-induced deformations accumulating above 0.02 displacements per atom (dpa) lead to highly fluctuating strains at ∼0.1 dpa, collapsing into a driven quasisteady structural state above ∼1 dpa. The driven asymptotic state is characterized by finely dispersed vacancy defects coexisting with an extended dislocation network and exhibits positive volumetric swelling, due to the creation of new crystallographic planes through self-interstitial coalescence, but negative lattice strain.
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Affiliation(s)
- Daniel R Mason
- UK Atomic Energy Authority, Culham Science Centre, Oxfordshire OX14 3DB, United Kingdom
| | - Suchandrima Das
- Department of Engineering Science, University of Oxford, Parks Road, OX1 3PJ, United Kingdom
| | - Peter M Derlet
- Condensed Matter Theory Group, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
| | - Sergei L Dudarev
- UK Atomic Energy Authority, Culham Science Centre, Oxfordshire OX14 3DB, United Kingdom
| | - Andrew J London
- UK Atomic Energy Authority, Culham Science Centre, Oxfordshire OX14 3DB, United Kingdom
| | - Hongbing Yu
- Department of Engineering Science, University of Oxford, Parks Road, OX1 3PJ, United Kingdom
| | - Nicholas W Phillips
- Department of Engineering Science, University of Oxford, Parks Road, OX1 3PJ, United Kingdom
| | - David Yang
- Department of Engineering Science, University of Oxford, Parks Road, OX1 3PJ, United Kingdom
| | | | - Ruqing Xu
- Advanced Photon Source, Argonne National Lab, 9700 South Cass Avenue, Argonne, Illinois 60439, USA
| | - Felix Hofmann
- Department of Engineering Science, University of Oxford, Parks Road, OX1 3PJ, United Kingdom
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Andolina CM, Williamson P, Saidi WA. Optimization and validation of a deep learning CuZr atomistic potential: Robust applications for crystalline and amorphous phases with near-DFT accuracy. J Chem Phys 2020; 152:154701. [PMID: 32321274 DOI: 10.1063/5.0005347] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
We show that a deep-learning neural network potential (DP) based on density functional theory (DFT) calculations can well describe Cu-Zr materials, an example of a binary alloy system, that can coexist in as ordered intermetallic and as an amorphous phase. The complex phase diagram for Cu-Zr makes it a challenging system for traditional atomistic force-fields that cannot accurately describe the different properties and phases. Instead, we show that a DP approach using a large database with ∼300k configurations can render results generally on par with DFT. The training set includes configurations of pristine and bulk elementary metals and intermetallic structures in the liquid and solid phases in addition to slab and amorphous configurations. The DP model was validated by comparing bulk properties such as lattice constants, elastic constants, bulk moduli, phonon spectra, and surface energies to DFT values for identical structures. Furthermore, we contrast the DP results with values obtained using well-established two embedded atom method potentials. Overall, our DP potential provides near DFT accuracy for the different Cu-Zr phases but with a fraction of its computational cost, thus enabling accurate computations of realistic atomistic models, especially for the amorphous phase.
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Affiliation(s)
- Christopher M Andolina
- Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, Pennsylvania 15216, USA
| | - Philip Williamson
- Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, Pennsylvania 15216, USA
| | - Wissam A Saidi
- Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, Pennsylvania 15216, USA
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Hudson TS, Dudarev SL, Sutton AP. Confinement of interstitial cluster diffusion by oversized solute atoms. Proc Math Phys Eng Sci 2004. [DOI: 10.1098/rspa.2004.1289] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Toby S. Hudson
- Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, UK
| | - Sergei L. Dudarev
- EURATOM/UKAEA Fusion Association, Culham Science Centre, Abingdon OX14 3DB, UK
| | - Adrian P. Sutton
- Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, UK
- Helsinki University of Technology, Laboratory of Computational Engineering, PO Box 9203, 02015 HUT, Finland
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Marian J, Wirth BD, Perlado JM. Mechanism of formation and growth of <100> interstitial loops in ferritic materials. PHYSICAL REVIEW LETTERS 2002; 88:255507. [PMID: 12097099 DOI: 10.1103/physrevlett.88.255507] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2001] [Indexed: 05/23/2023]
Abstract
We propose a comprehensive mechanism for the formation and growth of <100> interstitial loops in alpha-Fe. This mechanism reconciles long-standing experimental observations of these defects in irradiated ferritic materials with recent atomistic simulations of collision cascades and defect cluster properties in Fe, in which highly mobile 1 / 2<111> clusters are seen to be the dominant feature. Hence, this work provides one of the necessary links to unify simulation with experiments in alpha-Fe and ferritic alloys subject to high-energy particle irradiation.
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Affiliation(s)
- Jaime Marian
- Chemistry and Materials Science Directorate, Lawrence Livermore National Laboratory, P.O. Box 808, L-353, Livermore, California 94550, USA.
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