| About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
High Entropy Materials: Concentrated Solid Solution, Intermetallics, Ceramics, Functional Materials and Beyond
|
| Presentation Title |
Corrosion Resistant Property Improvement of CoCrFeNiMoTi-based High Entropy Alloy by Optimizing Composition |
| Author(s) |
Tatsuya Kimura, Hiroshi Shiratori, Kazuya Shinagawa, Kosuke Kuwabara, Yuzo Daigo |
| On-Site Speaker (Planned) |
Tatsuya Kimura |
| Abstract Scope |
CoCrFeNiMoTi-based high entropy alloy (HEA) fabricated by selective laser melting (SLM) method has high strength and excellent corrosion resistant properties. In this study, the effect of each constituent element on the corrosion behavior was investigated for casted alloy. The results showed that Mo and Cr improved the corrosion resistant property, while Ni and Ti deteriorated it. From these results, the optimized composition of the alloy was proposed and SLM products of the proposed alloy were obtained using pre-alloyed powder. Although the pitting potential of the SLM product of the previously reported alloy was 0.82V vs. Ag/AgCl under 3.5% saltwater environment at 80°C, no pitting corrosion was observed in the SLM product of the alloy with the optimized composition under the same environment. It was confirmed that the corrosion resistant property was actually improved by the composition optimization. |