Preparation and characterization of biomedical Ni-Co-Al shape memory alloys
Joint Authors
Abd al-Amir, Zaynah
al-Saffar, Sahib M.
al-Husni, Imad Sadi Abd al-Karim Ahmad
Source
Engineering and Technology Journal
Issue
Vol. 34, Issue 7A (31 Jul. 2016), pp.1457-1467, 11 p.
Publisher
Publication Date
2016-07-31
Country of Publication
Iraq
No. of Pages
11
Main Subjects
Abstract EN
This research presents microstructural characterization of the Co Ni Al shape memory alloy with focus on understanding the significant properties as well as the relation between the physical properties and microstructure of this alloy.
Melting technique were used to prepare Co Al Ni shape memory alloys, where scanning electron microscope, light optical microscopy and x-ray diffraction investigations showed that structure of this alloy is polycrystalline double phase (β and γ) structure, and it found that the grain size and phase fraction of β phase was ranged from 9 to 16 μm and (50- 80) % respectively.
It was found that by increasing the heat treatment time the phase fraction of hard β phase increased and phase fraction of ductile γ phase decreased, and consequently the grain size and the hardness of β phase increased.
Differential Scanning Calorimeter results showed that transformation temperature decreased by increasing Al/Co, that Co content affected on transformation temperature.
Tafel Curves showed the corrosion behavior in simulation body fluid, where the corrosion rate was ranged from 0.13 to 0.47 mpy and increased with each of increasing the annealing time and Co content, and from cyclic curves, the pitting corrosion possibility is not observed due to the formation of a protective layer that formed by Al element.
According to these properties and behavior, it was found that this alloy could be a good choice to be used for biomedical applications, especially in surgical, catheter tools and medical instruments
American Psychological Association (APA)
al-Husni, Imad Sadi Abd al-Karim Ahmad& al-Saffar, Sahib M.& Abd al-Amir, Zaynah. 2016. Preparation and characterization of biomedical Ni-Co-Al shape memory alloys. Engineering and Technology Journal،Vol. 34, no. 7A, pp.1457-1467.
https://search.emarefa.net/detail/BIM-700728
Modern Language Association (MLA)
al-Husni, Imad Sadi Abd al-Karim Ahmad…[et al.]. Preparation and characterization of biomedical Ni-Co-Al shape memory alloys. Engineering and Technology Journal Vol. 34, no. 7A (2016), pp.1457-1467.
https://search.emarefa.net/detail/BIM-700728
American Medical Association (AMA)
al-Husni, Imad Sadi Abd al-Karim Ahmad& al-Saffar, Sahib M.& Abd al-Amir, Zaynah. Preparation and characterization of biomedical Ni-Co-Al shape memory alloys. Engineering and Technology Journal. 2016. Vol. 34, no. 7A, pp.1457-1467.
https://search.emarefa.net/detail/BIM-700728
Data Type
Journal Articles
Language
English
Record ID
BIM-700728