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Samae V, Cordier P, Demouchy S, Bollinger C, Gasc J, Koizumi S, Mussi A, Schryvers D, Idrissi H. Stress-induced amorphization triggers deformation in the lithospheric mantle. Nature 2021; 591:82-86. [PMID: 33658696 DOI: 10.1038/s41586-021-03238-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Accepted: 01/13/2021] [Indexed: 01/31/2023]
Abstract
The mechanical properties of olivine-rich rocks are key to determining the mechanical coupling between Earth's lithosphere and asthenosphere. In crystalline materials, the motion of crystal defects is fundamental to plastic flow1-4. However, because the main constituent of olivine-rich rocks does not have enough slip systems, additional deformation mechanisms are needed to satisfy strain conditions. Experimental studies have suggested a non-Newtonian, grain-size-sensitive mechanism in olivine involving grain-boundary sliding5,6. However, very few microstructural investigations have been conducted on grain-boundary sliding, and there is no consensus on whether a single or multiple physical mechanisms are at play. Most importantly, there are no theoretical frameworks for incorporating the mechanics of grain boundaries in polycrystalline plasticity models. Here we identify a mechanism for deformation at grain boundaries in olivine-rich rocks. We show that, in forsterite, amorphization takes place at grain boundaries under stress and that the onset of ductility of olivine-rich rocks is due to the activation of grain-boundary mobility in these amorphous layers. This mechanism could trigger plastic processes in the deep Earth, where high-stress conditions are encountered (for example, at the brittle-plastic transition). Our proposed mechanism is especially relevant at the lithosphere-asthenosphere boundary, where olivine reaches the glass transition temperature, triggering a decrease in its viscosity and thus promoting grain-boundary sliding.
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Affiliation(s)
- Vahid Samae
- Electron Microscopy for Materials Science, University of Antwerp, Antwerp, Belgium
| | - Patrick Cordier
- Univ. Lille, CNRS, INRAE, Centrale Lille, UMR 8207, UMET, Unité Matériaux et Transformations, Lille, France. .,Institut Universitaire de France, Paris, France.
| | - Sylvie Demouchy
- Géosciences Montpellier, Université de Montpellier, CNRS, UMR, Montpellier, France
| | - Caroline Bollinger
- Bayerisches Geoinstitut, Universität Bayreuth, Bayreuth, Germany.,IRAP, Université de Toulouse, CNRS, CNES, UPS, Toulouse, France
| | - Julien Gasc
- Géosciences Montpellier, Université de Montpellier, CNRS, UMR, Montpellier, France.,Laboratoire de Géologie, École Normale Supérieure, CNRS, UMR8538, Paris, France
| | - Sanae Koizumi
- Earthquake Research Institute, University of Tokyo, Tokyo, Japan
| | - Alexandre Mussi
- Univ. Lille, CNRS, INRAE, Centrale Lille, UMR 8207, UMET, Unité Matériaux et Transformations, Lille, France
| | - Dominique Schryvers
- Electron Microscopy for Materials Science, University of Antwerp, Antwerp, Belgium
| | - Hosni Idrissi
- Electron Microscopy for Materials Science, University of Antwerp, Antwerp, Belgium.,Institute of Mechanics, Materials and Civil Engineering, Université Catholique de Louvain, Louvain-la-Neuve, Belgium
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Li H, Liu X, Sun Q, Ye L, Zhang X. Superplastic Deformation Mechanisms in Fine-Grained 2050 Al-Cu-Li Alloys. MATERIALS 2020; 13:ma13122705. [PMID: 32545854 PMCID: PMC7344781 DOI: 10.3390/ma13122705] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 06/10/2020] [Accepted: 06/11/2020] [Indexed: 11/16/2022]
Abstract
The deformation behavior and microstructural evolution of fine-grained 2050 alloys at elevated temperatures and slow strain rates were investigated. The results showed that significant dynamic anisotropic grain growth occurred at the primary stage of deformation. Insignificant dislocation activity, particle-free zones, and the complete progress of grain neighbor switching based on diffusion creep were observed during superplastic deformation. Quantitative calculation showed that diffusion creep was the dominant mechanism in the superplastic deformation process, and that grain boundary sliding was involved as a coordination mechanism. Surface studies indicated that the diffusional transport of materials was accomplished mostly through the grain boundary, and that the effect of the bulk diffusion was not significant.
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Affiliation(s)
- Hongping Li
- School of Materials Science and Engineering, Central South University, Changsha 410083, China; (H.L.); (X.L.); (Q.S.); (X.Z.)
- Shanghai Aircraft Design and Research Institute of COMAC, Shanghai 200232, China
| | - Xiaodong Liu
- School of Materials Science and Engineering, Central South University, Changsha 410083, China; (H.L.); (X.L.); (Q.S.); (X.Z.)
| | - Quan Sun
- School of Materials Science and Engineering, Central South University, Changsha 410083, China; (H.L.); (X.L.); (Q.S.); (X.Z.)
| | - Lingying Ye
- School of Materials Science and Engineering, Central South University, Changsha 410083, China; (H.L.); (X.L.); (Q.S.); (X.Z.)
- Key Laboratory of Nonferrous Materials, Ministry of Education, Central South University, Changsha 410083, China
- Correspondence:
| | - Xinming Zhang
- School of Materials Science and Engineering, Central South University, Changsha 410083, China; (H.L.); (X.L.); (Q.S.); (X.Z.)
- Key Laboratory of Nonferrous Materials, Ministry of Education, Central South University, Changsha 410083, China
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Micrograin Superplasticity: Characteristics and Utilization. MATERIALS 2011; 4:1194-1223. [DOI: 10.3390/ma4061194] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2011] [Revised: 06/07/2011] [Accepted: 06/16/2011] [Indexed: 11/17/2022]
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Duong K, Mohamed FA. Effect of Cd on the boundary sliding behaviour in superplastic Pb–62 wt% Sn alloy. ACTA ACUST UNITED AC 2009. [DOI: 10.1080/01418610008216501] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Kimberly Duong
- a Department of Chemical and Biochemical Engineering and Materials Science , University of California , Irvine , California , 92697-2575 , USA
| | - Farghalli A. Mohamed
- a Department of Chemical and Biochemical Engineering and Materials Science , University of California , Irvine , California , 92697-2575 , USA
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Eberhardt A, Baudelet B. Interphase boundary sliding at high temperature in two-phase (α/β)-brass bicrystals. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/01418618008243892] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Affiliation(s)
- X. Xiao
- GeoForschungsZentrum Potsdam; Potsdam Germany
| | - R. Wirth
- GeoForschungsZentrum Potsdam; Potsdam Germany
| | - G. Dresen
- GeoForschungsZentrum Potsdam; Potsdam Germany
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Kashyap BP. Interfacial phenomena and microstructural evolution during superplastic deformation. SURF INTERFACE ANAL 2001. [DOI: 10.1002/sia.1082] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Zelin MG, Mukherjee AK. Analysis of the cooperative grain boundary sliding in terms of cellular dislocations. ACTA ACUST UNITED AC 1993. [DOI: 10.1080/01418619308222926] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Valiev R, Langdon T. An investigation of the role of intragranular dislocation strain in the superplastic Pb-62% Sn eutectic alloy. ACTA ACUST UNITED AC 1993. [DOI: 10.1016/0956-7151(93)90029-r] [Citation(s) in RCA: 136] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Haruna T, Shibayanagi T, Hori S, Furushiro N. Effect of Grain Boundary Characters on Grain Boundary Sliding during Superplastic Deformation. ACTA ACUST UNITED AC 1992. [DOI: 10.2320/matertrans1989.33.374] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- Takumi Haruna
- Department of Materials Science and Engineering, Osaka University
| | | | - Shigenori Hori
- Department of Materials Science and Engineering, Osaka University
| | - Norio Furushiro
- Department of Materials Science and Engineering, Osaka University
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Processing dispersion-strengthened SnPb solders to achieve microstructural refinement and stability. ACTA ACUST UNITED AC 1991. [DOI: 10.1016/0956-716x(91)90023-t] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Furushiro N, Takayama Y, Hori S. Estimation of the Mean Grain Diameter of Polycrystalline Materials. ACTA ACUST UNITED AC 1989. [DOI: 10.2320/matertrans1989.30.27] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- Norio Furushiro
- Department of Materials Science and Engineering, Faculty of Engineering, Osaka University
| | | | - Shigenori Hori
- Department of Materials Science and Engineering, Faculty of Engineering, Osaka University
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Hammond C, Nichells A, Paton N. Photoemission electron microscopy of superplastic deformation processes. ACTA ACUST UNITED AC 1987. [DOI: 10.1016/0026-0800(87)90029-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Valiev RZ, Kaibyshev OA, Astanin VV, Emaletdinov AK. The nature of grain boundary sliding and the superplastic flow. ACTA ACUST UNITED AC 1983. [DOI: 10.1002/pssa.2210780209] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Arieli A, Mukherjee AK. The rate-controlling deformation mechanisms in superplasticity—a critical assessment. ACTA ACUST UNITED AC 1982. [DOI: 10.1007/bf02642385] [Citation(s) in RCA: 65] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Shariat P, Vastava RB, Langdon TG. An evaluation of the roles of intercrystalline and interphase boundary sliding in two-phase superplastic alloys. ACTA ACUST UNITED AC 1982. [DOI: 10.1016/0001-6160(82)90068-2] [Citation(s) in RCA: 89] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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