Transition from many domain to single domain martensite morphology in small-scale shape memory alloys
The morphology of the martensitic transformation during a superelastic cycle is studied by in situ scanning electron microscopy deformation experiments in microwires of Cu–Zn–Al. The diameters of the wires studied (21–136 μm) span the range in which significant size effects upon transformation hyste...
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| Format: | Article |
| Language: | en_US |
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Elsevier
2016
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| Online Access: | http://hdl.handle.net/1721.1/102382 https://orcid.org/0000-0001-9856-2682 |
| _version_ | 1811088313500565504 |
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| author | Ueland, Stian M. Schuh, Christopher A. |
| author2 | Massachusetts Institute of Technology. Department of Materials Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Materials Science and Engineering Ueland, Stian M. Schuh, Christopher A. |
| author_sort | Ueland, Stian M. |
| collection | MIT |
| description | The morphology of the martensitic transformation during a superelastic cycle is studied by in situ scanning electron microscopy deformation experiments in microwires of Cu–Zn–Al. The diameters of the wires studied (21–136 μm) span the range in which significant size effects upon transformation hysteresis have been observed. In larger wires the transformation is accommodated by the continual nucleation of many new martensite plates that grow and eventually coalesce with their neighbors. In small wires a single martensite plate nucleates at the start of transformation and then proceeds to grow in a monolithic fashion; the wire transforms by smooth axial propagation of a single interface. The transition from many domain to single domain transformation is gradual with wire diameter, and is based upon scaling of the domain density with sample size. We attribute it to a crossover from bulk to surface obstacle control of transformation front propagation. This observation also sheds light on reported size effects in energy dissipation in shape memory alloys. |
| first_indexed | 2024-09-23T14:00:14Z |
| format | Article |
| id | mit-1721.1/102382 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T14:00:14Z |
| publishDate | 2016 |
| publisher | Elsevier |
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| spelling | mit-1721.1/1023822022-10-01T18:30:00Z Transition from many domain to single domain martensite morphology in small-scale shape memory alloys Ueland, Stian M. Schuh, Christopher A. Massachusetts Institute of Technology. Department of Materials Science and Engineering Schuh, Christopher A. Ueland, Stian M. Schuh, Christopher A. The morphology of the martensitic transformation during a superelastic cycle is studied by in situ scanning electron microscopy deformation experiments in microwires of Cu–Zn–Al. The diameters of the wires studied (21–136 μm) span the range in which significant size effects upon transformation hysteresis have been observed. In larger wires the transformation is accommodated by the continual nucleation of many new martensite plates that grow and eventually coalesce with their neighbors. In small wires a single martensite plate nucleates at the start of transformation and then proceeds to grow in a monolithic fashion; the wire transforms by smooth axial propagation of a single interface. The transition from many domain to single domain transformation is gradual with wire diameter, and is based upon scaling of the domain density with sample size. We attribute it to a crossover from bulk to surface obstacle control of transformation front propagation. This observation also sheds light on reported size effects in energy dissipation in shape memory alloys. Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies 2016-05-03T14:23:29Z 2016-05-03T14:23:29Z 2013-07 2013-05 Article http://purl.org/eprint/type/JournalArticle 13596454 1873-2453 http://hdl.handle.net/1721.1/102382 Ueland, Stian M., and Christopher A. Schuh. “Transition from Many Domain to Single Domain Martensite Morphology in Small-Scale Shape Memory Alloys.” Acta Materialia 61, no. 15 (September 2013): 5618–5625. https://orcid.org/0000-0001-9856-2682 en_US http://dx.doi.org/10.1016/j.actamat.2013.06.003 Acta Materialia Creative Commons Attribution-NonCommercial-NoDerivs License http://creativecommons.org/licenses/by-nc-nd/4.0/ application/pdf Elsevier Prof. Schuh via Angie Locknar |
| spellingShingle | Ueland, Stian M. Schuh, Christopher A. Transition from many domain to single domain martensite morphology in small-scale shape memory alloys |
| title | Transition from many domain to single domain martensite morphology in small-scale shape memory alloys |
| title_full | Transition from many domain to single domain martensite morphology in small-scale shape memory alloys |
| title_fullStr | Transition from many domain to single domain martensite morphology in small-scale shape memory alloys |
| title_full_unstemmed | Transition from many domain to single domain martensite morphology in small-scale shape memory alloys |
| title_short | Transition from many domain to single domain martensite morphology in small-scale shape memory alloys |
| title_sort | transition from many domain to single domain martensite morphology in small scale shape memory alloys |
| url | http://hdl.handle.net/1721.1/102382 https://orcid.org/0000-0001-9856-2682 |
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