In situ synchrotron X-ray diffraction study of deformation behavior and load transfer in a Ti{sub 2}Ni-NiTi composite
- Department of Materials Science and Engineering, China University of Petroleum-Beijing, Changping, Beijing 102249 (China)
- School of Mechanical and Chemical Engineering, The University of Western Australia, Crawley, WA 6009 (Australia)
- X-ray Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
- State Key Laboratory of Nonlinear Mechanics (LNM), Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190 (China)
The deformation behavior and load transfer of a dual-phase composite composed of martensite NiTi embedded in brittle Ti{sub 2}Ni matrices were investigated by using in situ synchrotron x-ray diffraction during compression. The composite exhibits a stage-wise deformation feature and a double-yielding phenomenon, which were caused by the interaction between Ti{sub 2}Ni and NiTi with alternative microscopic deformation mechanism. No load transfer occurs from the soft NiTi dendrites to the hard Ti{sub 2}Ni matrices during the pseudoplastic deformation (detwinning) of NiTi, which is significantly different from that previously reported in bulk metallic glasses matrices composites.
- OSTI ID:
- 22311191
- Journal Information:
- Applied Physics Letters, Vol. 105, Issue 4; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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