Texture memory and strain-texture mapping in a NiTi shape memory alloy
- Materials Department, New Mexico Tech, 801 Leroy Place, Socorro, New Mexico 87801 (United States)
The authors report on the near-reversible strain hysteresis during thermal cycling of a polycrystalline NiTi shape memory alloy at a constant stress that is below the yield strength of the martensite. In situ neutron diffraction experiments are used to demonstrate that the strain hysteresis occurs due to a texture memory effect, where the martensite develops a texture when it is cooled under load from the austenite phase and is thereafter ''remembered.'' Further, the authors quantitatively relate the texture to the strain by developing a calculated strain-texture map or pole figure for the martensite phase, and indicate its applicability in other martensitic transformations.
- OSTI ID:
- 21016086
- Journal Information:
- Applied Physics Letters, Vol. 91, Issue 6; Other Information: DOI: 10.1063/1.2768899; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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