High-Pressure Torsion of Ti: Synchrotron characterization of phase volume fraction and domain sizes
- Title
- High-Pressure Torsion of Ti: Synchrotron characterization of phase volume fraction and domain sizes
- Author
- Megumi Kawasaki
- Keywords
- SPD; HPT; ECAP; ω-Ti; nanostructure.
- Issue Date
- 2014-06
- Publisher
- Institute of Physics, 2014.
- Citation
- In: IOP Conference Series: Materials Science and Engineering, 6th International Conference on Nanomaterials by Severe Plastic Deformation, 2014, 63(1),7pages
- Abstract
- Rods of grade 2 Ti were processed by Equal-Channel Angular Pressing (ECAP) (phgr = 120° at 573 K) employing 2, 4 and 6 passes. The same billets were further deformed by High- Pressure Torsion (HPT) at room temperature, varying both the hydrostatic pressure (1 and 6 GPa) and the number of rotations (n = 1 and 5). The ECAP and HPT samples were studied by synchrotron radiation at DESY-Petra III GEMS line. On the ECAP samples, textures were thus determined while for both ECAP and HPT samples the measurements were further analyzed by MAUD. Domain sizes and phase volume fractions were determined as a function of the radial direction of the samples. Alpha and Omega phases were detected in different amounts depending mostly on hydrostatic pressure and shear deformation. These transition phases can be pressure-induced during HPT processing and the results of Vickers microhardness measurements were related to the processing parameters and to the amounts of these phases.
- URI
- http://iopscience.iop.org/article/10.1088/1757-899X/63/1/012147/metahttp://hdl.handle.net/20.500.11754/54486
- ISSN
- 1757-899X; 1757-8981
- DOI
- 10.1088/1757-899X/63/1/012147
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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