High-temperature mechanical properties and fatigue of nanocrystalline nickel-cobalt-phosphorous (NiCoP) alloy
| Autor: | M. Renavikar, Taylor Rawlings, Diglio Paul J, Paresh Daharwal, Mohit Khurana, George Hsieh, Pooya Tadayon, Nilesh Badwe, Sarah Wozny |
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| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Materials science Alloy chemistry.chemical_element 02 engineering and technology engineering.material Abnormal grain growth 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Fatigue limit Nanocrystalline material chemistry 0103 physical sciences Ultimate tensile strength engineering General Materials Science Composite material 0210 nano-technology Joule heating Cobalt |
| Zdroj: | Materialia. 18:101136 |
| ISSN: | 2589-1529 |
| DOI: | 10.1016/j.mtla.2021.101136 |
| Popis: | Nanocrystalline (nc) alloys, owing to their high strength, have been extensively studied over the past few years. High-temperature mechanical properties including tensile and fatigue were studied for commercially obtained nc nickel-cobalt-phosphorous (NiCoP) alloy through a novel mechanical testing setup. The Joule heating technique was used to enable high-temperature testing to 300 °C. The nc NiCoP was observed to maintain 90% of its strength to 130 °C and had > 1 GPa tensile strength up to 200 °C. Fatigue performance showed a minimum degradation between room temperature and 200 °C with an endurance limit of 750–825 MPa. Microstructure characterization revealed abnormal grain growth leading to fatigue fracture. |
| Databáze: | OpenAIRE |
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