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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2502.18037 |
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| _version_ | 1866915419193868288 |
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| author | Rozzi, Carlo Andrea Lisotti, Annamaria Goldoni, Guido De Renzi, Valentina |
| author_facet | Rozzi, Carlo Andrea Lisotti, Annamaria Goldoni, Guido De Renzi, Valentina |
| contents | Shape-memory alloys exhibit a solid-to-solid phase transition that involves a temperature-driven rearrangement of their crystal structure and is responsible for their remarkable properties and numerous technological applications. Here, we propose a simple experiment that analyzes the sound emitted by a Ni$_{40}$Ti$_{50}$Cu$_{10}$ bar at different temperatures as it undergoes a transition between its austenite and martensite phases. We show that the phase transition, which occurs slightly above room temperature, can be qualitatively detected by the ear and quantitatively described using a very simple experimental setup and sound analysis tools. Such a sound-based investigation provides an unusual and engaging way to experimentally introduce solid-to-solid phase transitions, that is suitable for undergraduate courses. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_18037 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Listen! It's a phase transition. The sound of a shape-memory alloy Rozzi, Carlo Andrea Lisotti, Annamaria Goldoni, Guido De Renzi, Valentina Materials Science Physics Education Shape-memory alloys exhibit a solid-to-solid phase transition that involves a temperature-driven rearrangement of their crystal structure and is responsible for their remarkable properties and numerous technological applications. Here, we propose a simple experiment that analyzes the sound emitted by a Ni$_{40}$Ti$_{50}$Cu$_{10}$ bar at different temperatures as it undergoes a transition between its austenite and martensite phases. We show that the phase transition, which occurs slightly above room temperature, can be qualitatively detected by the ear and quantitatively described using a very simple experimental setup and sound analysis tools. Such a sound-based investigation provides an unusual and engaging way to experimentally introduce solid-to-solid phase transitions, that is suitable for undergraduate courses. |
| title | Listen! It's a phase transition. The sound of a shape-memory alloy |
| topic | Materials Science Physics Education |
| url | https://arxiv.org/abs/2502.18037 |