|About this Abstract
||2019 TMS Annual Meeting & Exhibition
||Coatings and Surface Engineering for Environmental Protection
||Corrosion Phenomena in Powder-processed Icosahedral-phase-strengthened Aluminum Alloys
||Sarshad Rommel, Hannah Leonard, Thomas Watson, Sonia Tulyani, Mark Aindow
|On-Site Speaker (Planned)
Recently, we have developed an Al-Cr-Mn-Co-Zr alloy that exhibits a nano-composite FCC Al plus I-phase microstructure in gas-atomized powder. This microstructure is retained during consolidation of the powder to form bulk material or cold-sprayed coatings, and the materials exhibit a remarkable combination of mechanical properties and pitting corrosion resistance. Here we report a study on the pitting corrosion behavior in a series of three more dilute Al-Cr-Mn-Co-Zr alloys in saline solutions. These alloys contain the same phases as the original alloy, but there are variations in the I-phase morphology and distribution. The pitting behavior of these alloys is affected both by these variations in composition/morphology, as well as by variations in processing parameters like forging upset and forging temperature. The effect of these variations on the pitting characteristics of these alloys is investigated and discussed through a combination of electron microscopy and cyclic voltammetry techniques.
||Planned: Supplemental Proceedings volume