|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XIII
||Role of Alloy Chemistry and Free Volume on the Corrosion Behavior of Bulk Metallic Glasses
||Ayyagari Aditya, Sundeep Mukherjee
|On-Site Speaker (Planned)
Bulk metallic glasses have superior corrosion resistance due to the lack of grain boundaries, which act as preferred nucleation sites for corrosion pits. The alloy chemistry as well as the free volume play a major role in determining the nature of the passivation layer and consequently the corrosion behavior. The corrosion behavior of several zirconium-based bulk metallic glasses were evaluated in NaCl solution. Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) measurements were performed to understand the corrosion mechanisms. Raman and auger surface spectroscopy were employed to identify the corrosion products and passivation layers. Stable and complex Nb oxides were found to promote surface passivation and delay pit initiation. Severe plastic deformation of BMGs was done to improve the surface mechanical properties and the resulting free volume was correlated with their corrosion behavior.
||Planned: A print-only volume