|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Coatings and Surface Engineering for Environmental Protection II
||Corrosion Phenomena in Powder-processed Icosahedral-phase-strengthened Aluminum Alloys
||Sarshad Rommel, Hannah R Leonard, Mingxuan Li, Thomas J Watson, Tod Policandriotes , Mark Aindow
|On-Site Speaker (Planned)
Recently, we have developed an Al-Cr-Mn-Co-Zr alloy that exhibits a nano-composite FCC Al matrix plus I-phase dispersoid microstructure in gas-atomized powder. This alloy shows a variation in both the morphology/distribution of the I-phase, and the composition of the matrix, depending on the size range of the gas atomized powder particles. These microstructures are retained during consolidation of the powder to form bulk materials, but are altered significantly during upset forging of this consolidated bulk alloy. The corrosion resistance and near-surface I-phase stability of both the as-consolidated and the upset forged alloys upon exposure to chloride-rich aqueous media are investigated through a combination of electron microscopy, cyclic voltammetry and electrochemical impedance spectroscopy techniques. These results are discussed as a function of the local variation in the I-phase microstructure and the Al matrix composition.
||Planned: Supplemental Proceedings volume