Awang Shri, Dayangku Noorfazidah and Tsuchiya, Koichi and Yamamoto, Akiko (2014) Surface Characterization of TiNi Deformed by High-pressure Torsion. Applied Surface Science, 289. pp. 338-344. ISSN 0169-4332. (Published)
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Abstract
Effect of grain refinements and amorphization by high-pressure torsion (HPT) on surface chemistry was investigated on TiNi. X-ray diffraction and micro-Vickers tests were used to check the phase changes and hardness before and after HPT. X-ray photoelectron spectroscopy was used to observe the changes in the natural passive film formation on the surface. Phase analysis reveals the change of crystalline TiNi to nanostructured one with increased hardness with straining by HPT. Grain refinement and amorphization caused by HPT reduce the amount of metallic Ni in the passive films and also increase the thickness of the film.
| Item Type: | Article |
|---|---|
| Additional Information: | Indexed by Scopus |
| Uncontrolled Keywords: | Titanium–nickel; Nanocrystalline; Amorphous; Severe plastic deformation; XPS |
| Subjects: | T Technology > TJ Mechanical engineering and machinery |
| Faculty/Division: | Faculty of Mechanical Engineering |
| Depositing User: | Dr. Dayangku Noorfazidah Awang Shri |
| Date Deposited: | 08 Jan 2015 06:58 |
| Last Modified: | 12 Jul 2018 03:03 |
| URI: | http://umpir.ump.edu.my/id/eprint/8100 |
| Download Statistic: | View Download Statistics |
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