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Surface Characterization of TiNi Deformed by High-pressure Torsion

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

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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
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