Microstructure reset-based self-healing method using sub-second electric pulsing for metallic materials
| Autor: | Juwon Park, Seung-Jun Choi, Hye-Jin Jeong, Viet Tien Luu, Howook Choi, Moon-Jo Kim, Sung-Tae Hong, Heung Nam Han |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Recrystallization (metallurgy) 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Microstructure 01 natural sciences 0104 chemical sciences Niti alloy Self-healing Metallic materials Damage repair General Materials Science Composite material 0210 nano-technology Microscale chemistry |
| Zdroj: | Applied Materials Today. 20:100755 |
| ISSN: | 2352-9407 |
| DOI: | 10.1016/j.apmt.2020.100755 |
| Popis: | Microscale defects in materials damage the originally designed microstructure during their use, degrading their mechanical properties/life expectancy. Therefore, various methods for damage repair in materials have been proposed based on the concept of self-healing. However, self-healing for bulk metallic materials is still a challenge due to their strong atomic bonding. Here, we introduce a sub-second electric pulsing which can enhance the kinetics of microstructural changes to infinitely reset the damaged microstructure of metallic materials as a non-autonomous self-healing method. The principle of microstructure resetting is explained based on three categories of resetting cores: phase transformation, dislocation recovery, and recrystallization. Microstructure resetting assisted infinite reuse is successfully realized using 301L/316L stainless steels and super-elastic NiTi alloy, which are applicable materials of the resetting core. This is a new concept combining extreme simplicity, rapidness, and infinite repetition, which cannot be achieved by conventional methods. |
| Databáze: | OpenAIRE |
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