Phase transformation and incompatibility at grain boundaries in zirconia-based shape memory ceramics: a micromechanics-based simulation study
Abstract Zirconia-based shape memory ceramics (SMCs) exhibit anisotropic mechanical response when undergoing elastic deformations as well as during austenite–martensite phase transformation. This behavior results in different types of strain incompatibility at grain boundaries, which...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Springer US
2022
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| Online Access: | https://hdl.handle.net/1721.1/143481 |
| _version_ | 1826188208356982784 |
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| author | Wang, Zhiyi Lai, Alan Schuh, Christopher A. Radovitzky, Raúl |
| author2 | Massachusetts Institute of Technology. Department of Aeronautics and Astronautics |
| author_facet | Massachusetts Institute of Technology. Department of Aeronautics and Astronautics Wang, Zhiyi Lai, Alan Schuh, Christopher A. Radovitzky, Raúl |
| author_sort | Wang, Zhiyi |
| collection | MIT |
| description | Abstract
Zirconia-based shape memory ceramics (SMCs) exhibit anisotropic mechanical response when undergoing elastic deformations as well as during austenite–martensite phase transformation. This behavior results in different types of strain incompatibility at grain boundaries, which we study here using a micromechanical model. A single-crystal model is implemented to provide a full mechanistic three-dimensional description of the anisotropic elastic as well as martensitic transformation stress–strain response, including non-Schmid behavior caused by the significant volume change during martensitic transformation. This model was calibrated to and validated against compression tests of single-crystal zirconia micro-pillars conducted previously, and then used to model bi-crystals. Upon the introduction of a grain boundary, the simulation provides detailed information on the nucleation and evolution of martensite variants and stress distribution at grain boundaries. We identify bi-crystal configurations which result in very large stress concentrations at very low deformations due to elastic incompatibility, as well as others where the elastic incompatibility is relatively low and stress concentrations only occur at large transformation strains. We also show how this approach can be used to explore the misorientation space for quantifying the level of elastic and transformation incompatibility at SMCs grain boundaries.
Graphical abstract
Micromechanics models provide insights on grain boundary elastic and phase transformation strain incompatibility in shape memory zirconia |
| first_indexed | 2024-09-23T07:56:11Z |
| format | Article |
| id | mit-1721.1/143481 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T07:56:11Z |
| publishDate | 2022 |
| publisher | Springer US |
| record_format | dspace |
| spelling | mit-1721.1/1434812023-02-09T16:31:11Z Phase transformation and incompatibility at grain boundaries in zirconia-based shape memory ceramics: a micromechanics-based simulation study Wang, Zhiyi Lai, Alan Schuh, Christopher A. Radovitzky, Raúl Massachusetts Institute of Technology. Department of Aeronautics and Astronautics Massachusetts Institute of Technology. Department of Materials Science and Engineering Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies Abstract Zirconia-based shape memory ceramics (SMCs) exhibit anisotropic mechanical response when undergoing elastic deformations as well as during austenite–martensite phase transformation. This behavior results in different types of strain incompatibility at grain boundaries, which we study here using a micromechanical model. A single-crystal model is implemented to provide a full mechanistic three-dimensional description of the anisotropic elastic as well as martensitic transformation stress–strain response, including non-Schmid behavior caused by the significant volume change during martensitic transformation. This model was calibrated to and validated against compression tests of single-crystal zirconia micro-pillars conducted previously, and then used to model bi-crystals. Upon the introduction of a grain boundary, the simulation provides detailed information on the nucleation and evolution of martensite variants and stress distribution at grain boundaries. We identify bi-crystal configurations which result in very large stress concentrations at very low deformations due to elastic incompatibility, as well as others where the elastic incompatibility is relatively low and stress concentrations only occur at large transformation strains. We also show how this approach can be used to explore the misorientation space for quantifying the level of elastic and transformation incompatibility at SMCs grain boundaries. Graphical abstract Micromechanics models provide insights on grain boundary elastic and phase transformation strain incompatibility in shape memory zirconia 2022-06-21T12:58:40Z 2022-06-21T12:58:40Z 2022-06-16 2022-06-19T03:11:51Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/143481 Wang, Zhiyi, Lai, Alan, Schuh, Christopher A. and Radovitzky, Raúl. 2022. "Phase transformation and incompatibility at grain boundaries in zirconia-based shape memory ceramics: a micromechanics-based simulation study." PUBLISHER_CC en https://doi.org/10.1007/s10853-022-07324-3 Creative Commons Attribution https://creativecommons.org/licenses/by/4.0/ The Author(s) application/pdf Springer US Springer US |
| spellingShingle | Wang, Zhiyi Lai, Alan Schuh, Christopher A. Radovitzky, Raúl Phase transformation and incompatibility at grain boundaries in zirconia-based shape memory ceramics: a micromechanics-based simulation study |
| title | Phase transformation and incompatibility at grain boundaries in zirconia-based shape memory ceramics: a micromechanics-based simulation study |
| title_full | Phase transformation and incompatibility at grain boundaries in zirconia-based shape memory ceramics: a micromechanics-based simulation study |
| title_fullStr | Phase transformation and incompatibility at grain boundaries in zirconia-based shape memory ceramics: a micromechanics-based simulation study |
| title_full_unstemmed | Phase transformation and incompatibility at grain boundaries in zirconia-based shape memory ceramics: a micromechanics-based simulation study |
| title_short | Phase transformation and incompatibility at grain boundaries in zirconia-based shape memory ceramics: a micromechanics-based simulation study |
| title_sort | phase transformation and incompatibility at grain boundaries in zirconia based shape memory ceramics a micromechanics based simulation study |
| url | https://hdl.handle.net/1721.1/143481 |
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