|About this Abstract
|2023 TMS Annual Meeting & Exhibition
|Environmental Degradation of Additively Manufactured Alloys
|Corrosion Behavior of Additively Manufactured Al-Cr-Mn-Co-Zr Alloys
|Sarshad Rommel, Mingxuan Li, Thomas Watson, Callie Benson, Rainer Hebert , Mark Aindow
|On-Site Speaker (Planned)
Recently, we have developed a series of Al-Cr-Mn-Co-Zr alloys that exhibit nano-composite microstructures in gas-atomized powders. The microstructures comprise an FCC Al matrix with quasicrystalline I-phase dispersoids. Upon consolidation, the I-phase is retained in the bulk material, which exhibits an impressive combination of mechanical properties and exceptional resistance to pitting in salt-fog exposures. These alloys are being explored for use in a variety of additive manufacturing techniques, including coatings and powder-bed AM for solid builds. A key concern is the possible influence of the additive manufacturing processes on the microstructures of the alloys and on their corrosion response. Here, we present preliminary observations on the corrosion behavior of additively manufactured samples upon exposure to Cl- rich environments through a combination of electron microscopy, focused ion-beam milling and potentiostatic polarization techniques. Comparisons with corrosive attack on these alloys in their bulk consolidated and upset-forged conditions will also be discussed.
|Additive Manufacturing, Aluminum, Environmental Effects