The effects of homogenization time on the crystal structure and hardness of NiMnGaMo alloy
| Autor: | Serkan Dal, Murat Eskil, Bilal Demirel |
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| Přispěvatelé: | Sabire Yazıcı Fen Edebiyat Fakültesi |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Computer Networks and Communications Scanning electron microscope NiMnGaMo Shape Memory Alloys 020209 energy Alloy 02 engineering and technology engineering.material Indentation hardness law.invention Biomaterials Lattice constant Optical microscope law 0202 electrical engineering electronic engineering information engineering Composite material Civil and Structural Engineering Fluid Flow and Transfer Processes Mechanical Engineering 020208 electrical & electronic engineering Metals and Alloys Shape-memory alloy Electronic Optical and Magnetic Materials Hardware and Architecture lcsh:TA1-2040 Phase Transformation engineering Crystallite lcsh:Engineering (General). Civil engineering (General) Vacuum induction melting Heat Treatment |
| Zdroj: | Engineering Science and Technology, an International Journal, Vol 24, Iss 2, Pp 493-502 (2021) |
| Popis: | Eskil, Murat ( Aksaray, Yazar ) This study is based on X-ray diffraction (XRD) and DSC analysis, Scanning Electron Microscopy (SEM) and Optical Microscope observations and Vickers Micro Hardness Test results with structural effect and phase transformations on NiMnGa shape memory alloys with different composition. The addition of different elements to the shape-memory NiMnGa alloys and the heat treatment of the alloys are extremely useful for improving the shape memory, magnetic, mechanical, chemical and other physical properties. The NiMnGaMo alloys were successfully obtained using a vacuum induction melting furnace and then homogenized by heat treatment at 950 degrees C for 2, 24 and 96 h, respectively. After homogenization, all samples were cooled in ice water. Crystallographic results calculated from XRD data were evaluated by comparison with the data obtained by DSC analysis, Scanning Electron Microscope (SEM), Optical Microscope and Vickers Micro Hardness Test Device. The results show that the alloy with a higher Mo amount has a smaller crystallite size and the L2(1) lattice volume increases with heat treatment time. The change on microhardness values were discussed with the change on the obtained lattice constants. |
| Databáze: | OpenAIRE |
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