A novel high-entropy alloy with a dendrite-composite microstructure and remarkable compression performance
| Autor: | G. Li, J.T. Fan, L.J. Zhang, Pengfei Yu, Peter K. Liaw, Mengdi Zhang, R.P. Liu |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Mechanical property Materials science Mechanical Engineering Alloy technology industry and agriculture Metals and Alloys 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics Compression (physics) 01 natural sciences Dendrite (crystal) Compressive strength Mechanics of Materials 0103 physical sciences engineering General Materials Science Deformation (engineering) Composite material 0210 nano-technology Crystal twinning Composite microstructure |
| Zdroj: | Scripta Materialia. 159:18-23 |
| ISSN: | 1359-6462 |
| Popis: | In the present study, a novel dendrite-composite high-entropy alloy consisting of nano-structured interdendritic regions and coarse dendrites was successfully designed and prepared by arc-melting. Interestingly, the as-cast Al18Fe33.3Co23Ni23C2.7 (at. %) alloy exhibited a great combination of high compressive strength and strain. More importantly, the new material exhibited pronounced three-stage work-hardening behavior. It was found that deformation twinning in the interdendritic region is the dominant mechanism responsible for the multi-stage work-hardening, thereby leading to good compression behavior of the new material. The synergistic effects between the dendrite and interdendritic regions are also effective for improving the mechanical property of the alloy. |
| Databáze: | OpenAIRE |
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