Orientation relations during the α-ω phase transition of zirconium: in situ texture observations at high pressure and temperature
| Autor: | Wenk, H-R, Kaercher, P, Kanitpanyacharoen, W, Zepeda-Alarcon, E, Wang, Y |
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| Rok vydání: | 2013 |
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| Zdroj: | Physical review letters, vol 111, iss 19 Wenk, HR; Kaercher, P; Kanitpanyacharoen, W; Zepeda-Alarcon, E; & Wang, Y. (2013). Orientation Relations during the α-ω Phase Transition of Zirconium: In Situ Texture Observations at High Pressure and Temperature. Physical Review Letters, 111(19). doi: 10.1103/PhysRevLett.111.195701. UC Berkeley: Retrieved from: http://www.escholarship.org/uc/item/6tr0g3rx |
| Popis: | Transition metals Ti, Zr, and Hf have a hexagonal close-packed structure (α) at ambient conditions, but undergo phase transformations with increasing temperature and pressure. Of particular significance is the high-pressure hexagonal ω phase which is brittle compared to the α phase. There has been a long debate about transformation mechanisms and orientation relations between the two crystal structures. Here we present the first high pressure experiments with in situ synchrotron x-ray diffraction texture studies on polycrystalline aggregates. We follow crystal orientation changes in Zr, confirming the original suggestion by Silcock for an α→ω martensitic transition for Ti, with (0001)α||(112̄0)ω, and a remarkable orientation memory when ω reverts back to α. © 2013 American Physical Society. |
| Databáze: | OpenAIRE |
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