| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmental Degradation of Multiple Principal Component Materials
|
| Presentation Title |
Passivation Behavior of Fe42Mn28Co10Cr15Si5 High Entropy Alloy |
| Author(s) |
Kavindan Balakrishnan, Krishnan S. Raja, Indrajit Charit |
| On-Site Speaker (Planned) |
Krishnan S. Raja |
| Abstract Scope |
Fe42Mn28Co10Cr15Si5 is a metastable high-entropy alloy (HEA) strengthened by the austenite to epsilon martensite transformation. The corrosion behavior was investigated in the as-cast condition. The microstructure comprised austenite (fcc) and epsilon martensite (hcp) phases. Different types of electrochemical tests were carried out in i) 0.5 M H2SO4, ii) 3.5%, iii) 3.5% + 0.1 M HCl, and iv) 3.5% NaCl + 0.1 M NaOH solutions. The passivation behavior of the Fe42Mn28Co10Cr15Si5 was analyzed based on the cyclic polarization, potentiostatic tests, and electrochemical impedance results. The pit growth potential, pitting protection potential, and pitting initiation time were determined in the 3.5% NaCl solutions at different pH levels. The semiconducting behaviors of the passive films were evaluated using the Mott-Schottky analysis. Raman spectroscopic analysis of the passive film indicated a complex oxide film consisting of all major elements. A passive film formation mechanism will be unveiled based on the electrochemical spectroscopic results. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Environmental Effects, Characterization |