|About this Abstract
||2023 TMS Annual Meeting & Exhibition
||Environmental Degradation of Additively Manufactured Alloys
||Corrosion Behavior of 7050 and 7075 Aluminum Alloys Processed through Reactive Additive Manufacturing
||Vikrant Beura, Antriksh Sharma, Yashaswini Karanth, Kiran Solanki
|On-Site Speaker (Planned)
In this work, a laser powder bed fusion (L-PBF) based reactive additive manufacturing (RAM) method has been used to process aluminum 7075 and 7050 alloys. Titanium and boron carbide was added as reactive particles during processing resulting in a crack-free, refined, and random textured microstructure. X-ray diffraction, Scanning and Transmission Electron Microscopy (SEM/TEM), and Energy Dispersive Spectroscopy (EDS) techniques were used for microstructure characterization. RAM 7075 showed precipitation of sub-micron to nanoscale Zn-Cu, Cu-Fe, and Mg-rich phases, while RAM 7050 showed Mg-Cu and Mg-Zn rich phases along the grain boundaries. A comparative corrosion response between wrought and RAM alloys was studied by electrochemical measurements such as potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and atomic emission spectroelectrochemistry analysis (AESCE). A reduction in corrosion resistance was observed with precipitation of excessive reactive particles in RAM alloys compared to wrought counterparts. Post-corrosion microstructures were analyzed to elucidate the underlying corrosion mechanism.
||Additive Manufacturing, Other, Other