Effect of Cold Deformation and Heat Treatment on the Microstructure and Mechanical Behavior of High Entropy Alloy CuCrFeNi2Al0.5
| Autor: | Hailong Du, Chao Sun, Yinlong Fan, Shaofeng Yang, Changfu Yu, Jinhong Pi, Baosen Zhang |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science Mechanical Engineering Alloy 02 engineering and technology engineering.material Nanoindentation 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Precipitation hardening Creep Mechanics of Materials 0103 physical sciences engineering General Materials Science Composite material 0210 nano-technology Chemical composition Softening Solid solution |
| Zdroj: | Journal of Materials Engineering and Performance. 28:586-592 |
| ISSN: | 1544-1024 1059-9495 |
| Popis: | CuCrFeNi2Al0.5, a high entropy alloy (HEA) with a single FCC phase, was deformed at room temperature and then heat treated. The small particles precipitated from the deformed FCC solid solution matrix after heating at 700 °C, softening the solid solution matrix. This outcome confirms that the microstructure of HEAs can be controlled by heat treatment in addition to controlling the chemical composition and the rate of cooling from liquid alloys. The hardness of the samples increased due to precipitation hardening, and the specimen heated at 700 °C with 10% predeformation had the highest hardness. As the predeformation increases, the precipitates tend to interweave in the network morphology. Meanwhile, grains in all specimens became more severely coarse after heat treatment at 1100 °C. Predeformation followed by annealing can obviously slow down the creep rate, indicating that annealing at an appropriate temperature can improve the mechanical properties of deformed HEA. |
| Databáze: | OpenAIRE |
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