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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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Myalska-Głowacka H, Chmiela B, Godzierz M, Sozańska M. Residual Stress Induced by Addition of Nanosized TiC in Titanium Matrix Composite. MATERIALS 2022; 15:ma15072517. [PMID: 35407850 PMCID: PMC8999256 DOI: 10.3390/ma15072517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 03/25/2022] [Accepted: 03/28/2022] [Indexed: 12/04/2022]
Abstract
A hot pressing process was employed to produce titanium-based composites. Nanosized TiC particles were incorporated in order to improve mechanical properties of the base material. The amount of nanosized additions in the composites was 0.5, 1.0, and 2.0 wt %, respectively. Moreover, a TiB phase was produced by in situ method during sintering process. The microstructure of the Ti–TiB–TiC composites was characterized by scanning electron microscopy (SEM), electron probe microanalysis (EPMA), electron backscatter diffraction (EBSD), and X-ray diffraction (XRD) techniques. Due to the hot pressing process the morphology of primary TiC particles was changed. Observed changes in the size and shape of the reinforcing phase suggest the transformation of primary carbides into secondary carbides. Moreover, an in situ formation of TiB phase was observed in the material. Additionally, residual stress measurements were performed and revealed a mostly compressive nature with the fine contribution of shear. With an increase in TiC content, linear stress decreased, which was also related with the presence of the TiB phase.
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Affiliation(s)
- Hanna Myalska-Głowacka
- Faculty of Materials Engineering, Silesian University of Technology, Krasinskiego 8, 40-019 Katowice, Poland; (B.C.); (M.S.)
- Correspondence: ; Tel.: +48-326034031; Fax: +48-326034400
| | - Bartosz Chmiela
- Faculty of Materials Engineering, Silesian University of Technology, Krasinskiego 8, 40-019 Katowice, Poland; (B.C.); (M.S.)
| | - Marcin Godzierz
- Centre of Polymer and Carbon Materials Polish Academy of Sciences, Curie-Sklodowskiej 34, 42-819 Zabrze, Poland;
| | - Maria Sozańska
- Faculty of Materials Engineering, Silesian University of Technology, Krasinskiego 8, 40-019 Katowice, Poland; (B.C.); (M.S.)
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