| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Coatings and Surface Engineering for Environmental Protection III
|
| Presentation Title |
Pitting Corrosion in Powder-processed Aluminum Alloys Containing Quasicrystalline Dispersoids |
| Author(s) |
Sarshad Rommel, Hannah R Leonard, Mingxuan Li, Thomas J Watson, Tod Policandriotes , Mark Aindow |
| On-Site Speaker (Planned) |
Sarshad Rommel |
| Abstract Scope |
Recently, we have developed a series of Al-Cr-Mn-Co-Zr alloys that exhibit a nano-composite FCC Al matrix plus quasicrystalline I-phase dispersoid microstructure in gas-atomized powders. The powder microstructures are retained during their consolidation to form bulk materials, but are altered significantly during upset forging of the consolidated bulk alloys. The pitting corrosion behavior of the alloys in Cl- rich environments has been studied using a combination of scanning and transmission electron microscopy, X-ray diffraction, and electrochemical techniques including electrochemical impedance spectroscopy, potentiostatic polarization and cyclic voltammetry. By comparing data obtained from the as-consolidated and the upset-forged alloys, we have elucidated the effects of the volume fraction and distribution of the reinforcement I-phase and the character of the surface corrosion product layers on the pitting corrosion resistance of these alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Aluminum, Environmental Effects, Surface Modification and Coatings |