|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Recent Developments in Biological, Structural and Functional Thin Films & Coatings
||Grain Boundary Engineering of Corrosion Resistant Aluminum Alloys
||Joel Bahena, Andrea M Hodge
|On-Site Speaker (Planned)
5xxx series of aluminum alloys are of great interest, especially in marine environments, due to their high strength-to-weight ratio and atmospheric corrosion resistance. However, these alloys are susceptible to sensitization, which can lead to intergranular corrosion and stress corrosion cracking. Previous studies have indicated that the grain boundary character, more specifically increasing the percentage of special grain boundaries (GBs), could greatly improve the corrosion properties of these Al alloys. In this study, the effect of special GBs on sensitization and intergranular corrosion are investigated through the synthesis of Al 5083 and Al 5456 films via magnetron sputtering and subsequent corrosion tests. The microstructures were tuned by altering the sputtering parameters, resulting in samples with varying percentages of special grain boundaries to elucidate this relationship. The microstructures of the sputtered Al alloy films have been characterized by EBSD and TEM.
||Planned: Supplemental Proceedings volume