About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Advances in Surface Engineering V
|
Presentation Title |
Effects of Aging and Surface Mechanical Attrition Treatment on Corrosion Behavior of Aluminum 7075 Alloys |
Author(s) |
Antriksh Sharma, Vikrant Beura, Kiran Solanki |
On-Site Speaker (Planned) |
Antriksh Sharma |
Abstract Scope |
In this work, a combination of aging and surface mechanical attrition treatments (SMAT) on aluminum 7075 alloys were performed to investigate microstructural variation in corrosion behavior. The microstructural variations were characterized through X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. An absence of conventionally Mg<sub>2</sub>Si and Al<sub>7</sub>Cu<sub>2</sub>Fe/Al<sub>23</sub>Fe<sub>4</sub>Cu phases as well as an abundance of Cu-Zn-Si phases was been observed near the SMAT surface. Aging followed by SMAT processing showed a positive shift in the corrosion potential compared to SMAT-treated alloy; however, anodic and cathodic reaction rates did not show significant variation. Similarly, the electrochemical impedance spectroscopy (EIS) demonstrated a stable and coherent oxide layer after processing the alloy however a reduction in the oxide impedance was observed after the SMATed alloy was aged. Further characterization was done using spectroscopy techniques such as X-ray photoelectron spectroscopy (XPS) and inductively coupled plasma-mass-spectrometry (ICP-MS) to elucidate the underlying corrosion mechanism. |
Proceedings Inclusion? |
Planned: |
Keywords |
Other, Other, Other |