|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||High Entropy Alloys VIII
||J-34: Effect of Al on Microstructure, Hardness, and Corrosion Performance of Al-Cr-Fe-Mn Alloys
||Jarrod Gesualdi, Cameron Blanchard, Hojong Kim
|On-Site Speaker (Planned)
Interfacial corrosion properties of as-cast Al-Cr-Fe-Mn alloys were studied under the control of Al content and microstructure by electrochemical polarization in aqueous solutions of Na2SO4 (1 M) and NaCl (1 M) at pH 3-7 and at room temperature. For example, the microstructure of Cr-Fe-Mn (10-67-23 at%) transformed from face-centered cubic (FCC) to body-centered cubic (BCC) structure with the addition of Al up to 15 at%. Based on anodic polarization curves, the increase of Al content resulted in the decrease of the passive current density (from 560 to 50 μA/cm2) and a positive shift of pitting potential, suggesting a beneficial effect of Al in enhancing corrosion resistance. In contrast, Vickers hardness values decreased at low Al content (5 at%) but increased with further Al addition (up to 15 at%), correlating with the change in microstructure.
||Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume