Phase Transformations, Microstructure and Shape Memory Effect of NiTiAg Alloy with Different Atomic Percentages (at. % Ag) Manufactured by Casting Method
In this paper, shape memory alloys (SMAs) (NiTi-based) have been manufactured by casting with a different atomic percentage of a silver element (0, 1, 2 and 3 at. % Ag) using a Vacuum Arc Remelting (VAR) furnace. The silver element is added to the binary alloys due to its excellent properties such a...
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| Format: | Article |
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Unviversity of Technology- Iraq
2021-04-01
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| Series: | Engineering and Technology Journal |
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| Online Access: | https://etj.uotechnology.edu.iq/article_168133_2cf814522ebc227bebb624e505b2d17c.pdf |
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| author | Saja M. Hussein Khansaa D. Salman Ahmed A. Hussein |
| author_facet | Saja M. Hussein Khansaa D. Salman Ahmed A. Hussein |
| author_sort | Saja M. Hussein |
| collection | DOAJ |
| description | In this paper, shape memory alloys (SMAs) (NiTi-based) have been manufactured by casting with a different atomic percentage of a silver element (0, 1, 2 and 3 at. % Ag) using a Vacuum Arc Remelting (VAR) furnace. The silver element is added to the binary alloys due to its excellent properties such as (anti-corrosion, anti-bacterial and high electrical conductivity), which make these alloys using in wider applications. These alloys with different atomic percentages (Ni55Ti45Ag0, Ni55Ti44Ag1, Ni55Ti43Ag2 and Ni55Ti42Ag3) have been manufactured. The successful manufacturing process has been achieved and proved via examinations and tests. The FESEM microscopic examinations show that the silver element has been distributed uniformly and homogeneously in the NiTi matrix. Moreover, the emergence of austenite phase, martensite phase and little amount impurities. Regarding the XRD examination, showed that there is an increase in the number of peaks of Ag phase with an increase in the atomic percentage of the silver element, as well to emergence of phase (Ti2Ni) upon heating, phase (Ti 002) upon cooling, and phase (Ni4Ti3) is not desired. The starting and finishing of the phase transformations have been determined for all samples by the DSC test. The Shape Memory Effect (SME) for the alloy (Ni50Ti42Ag3) is measured to be about 89.99%. |
| first_indexed | 2024-03-08T08:54:16Z |
| format | Article |
| id | doaj.art-3cfbdaad8e874cbe9a4abff1e85a6680 |
| institution | Directory Open Access Journal |
| issn | 1681-6900 2412-0758 |
| language | English |
| last_indexed | 2024-03-08T08:54:16Z |
| publishDate | 2021-04-01 |
| publisher | Unviversity of Technology- Iraq |
| record_format | Article |
| series | Engineering and Technology Journal |
| spelling | doaj.art-3cfbdaad8e874cbe9a4abff1e85a66802024-02-01T07:17:37ZengUnviversity of Technology- IraqEngineering and Technology Journal1681-69002412-07582021-04-01394A54355110.30684/etj.v39i4A.1833168133Phase Transformations, Microstructure and Shape Memory Effect of NiTiAg Alloy with Different Atomic Percentages (at. % Ag) Manufactured by Casting MethodSaja M. Hussein0Khansaa D. Salman1Ahmed A. Hussein2Department of Electromechanical Engineering, University of Technology, Baghdad, Iraq, 50748@student.uotechnology.edu.iqDepartment of Electromechanical Engineering, University of Technology, Baghdad, Iraq, drkhansaa_ds@yahoo.comDepartment of Electromechanical Engineering, University of Technology, Baghdad, Iraq, ahmedabdulqaderhussein@gmail.comIn this paper, shape memory alloys (SMAs) (NiTi-based) have been manufactured by casting with a different atomic percentage of a silver element (0, 1, 2 and 3 at. % Ag) using a Vacuum Arc Remelting (VAR) furnace. The silver element is added to the binary alloys due to its excellent properties such as (anti-corrosion, anti-bacterial and high electrical conductivity), which make these alloys using in wider applications. These alloys with different atomic percentages (Ni55Ti45Ag0, Ni55Ti44Ag1, Ni55Ti43Ag2 and Ni55Ti42Ag3) have been manufactured. The successful manufacturing process has been achieved and proved via examinations and tests. The FESEM microscopic examinations show that the silver element has been distributed uniformly and homogeneously in the NiTi matrix. Moreover, the emergence of austenite phase, martensite phase and little amount impurities. Regarding the XRD examination, showed that there is an increase in the number of peaks of Ag phase with an increase in the atomic percentage of the silver element, as well to emergence of phase (Ti2Ni) upon heating, phase (Ti 002) upon cooling, and phase (Ni4Ti3) is not desired. The starting and finishing of the phase transformations have been determined for all samples by the DSC test. The Shape Memory Effect (SME) for the alloy (Ni50Ti42Ag3) is measured to be about 89.99%.https://etj.uotechnology.edu.iq/article_168133_2cf814522ebc227bebb624e505b2d17c.pdfcast methoddscnitiagsmassmevar |
| spellingShingle | Saja M. Hussein Khansaa D. Salman Ahmed A. Hussein Phase Transformations, Microstructure and Shape Memory Effect of NiTiAg Alloy with Different Atomic Percentages (at. % Ag) Manufactured by Casting Method Engineering and Technology Journal cast method dsc nitiag smas sme var |
| title | Phase Transformations, Microstructure and Shape Memory Effect of NiTiAg Alloy with Different Atomic Percentages (at. % Ag) Manufactured by Casting Method |
| title_full | Phase Transformations, Microstructure and Shape Memory Effect of NiTiAg Alloy with Different Atomic Percentages (at. % Ag) Manufactured by Casting Method |
| title_fullStr | Phase Transformations, Microstructure and Shape Memory Effect of NiTiAg Alloy with Different Atomic Percentages (at. % Ag) Manufactured by Casting Method |
| title_full_unstemmed | Phase Transformations, Microstructure and Shape Memory Effect of NiTiAg Alloy with Different Atomic Percentages (at. % Ag) Manufactured by Casting Method |
| title_short | Phase Transformations, Microstructure and Shape Memory Effect of NiTiAg Alloy with Different Atomic Percentages (at. % Ag) Manufactured by Casting Method |
| title_sort | phase transformations microstructure and shape memory effect of nitiag alloy with different atomic percentages at ag manufactured by casting method |
| topic | cast method dsc nitiag smas sme var |
| url | https://etj.uotechnology.edu.iq/article_168133_2cf814522ebc227bebb624e505b2d17c.pdf |
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