Evading brittle fracture in submicron-sized high entropy intermetallics in dual-phase eutectic microstructure
| Autor: | Dukhyun Chung, Quanfeng He, Yong Yang, Zhaoyi Ding |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Mechanical Engineering Metals and Alloys Intermetallic Quinary 02 engineering and technology Laves phase 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 01 natural sciences Brittleness Fracture toughness Mechanics of Materials Phase (matter) 0103 physical sciences General Materials Science Composite material 0210 nano-technology Eutectic system |
| Zdroj: | Scripta Materialia. 187:280-284 |
| ISSN: | 1359-6462 |
| DOI: | 10.1016/j.scriptamat.2020.06.032 |
| Popis: | Conventional Laves phase is extremely brittle at room temperature. However, through a systematic study, we showed that the quinary Co-Cr-Fe-Ni-Nb Laves phase in a eutectic high entropy alloy (EHEA) can be plastically deformed at room temperature when its size is refined below 200 nm. Based on our current results, we propose a general micromechanical model that not only explains the suppression of cracks in the high entropy Laves phase but also enables the extraction of its fracture toughness even when the high entropy Laves phase deforms and cracks in a dual-phase microstructure. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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