| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Mechanisms and Mitigation of Aqueous Corrosion and High-temperature Oxidation
|
| Presentation Title |
Influence of Heat Treatment on Electrochemical Behavior of Additively Manufactured 7050 Aluminum Alloy |
| Author(s) |
Rupesh Rajendran, Kevin R Chasse, Preet M Singh |
| On-Site Speaker (Planned) |
Rupesh Rajendran |
| Abstract Scope |
The benefits of additive manufacturing process when combined with high-strength and light-weight properties, makes the 7xxx series aluminum alloys promising candidates for the aerospace industry. However, limited work exists to understand the effect of post-processing treatments like artificial ageing on their microstructure and corrosion behavior. This work aims to understand differences in microstructure and the resulting electrochemical response of additively manufactured Al 7050 alloys fabricated via Selective Laser Melting(SLM), as a result of varying ageing durations. Microstructure of differently heat-treated SLM Al 7050 alloy was characterized by optical and scanning electron microscopy. General electrochemical behavior was studied using potentiodynamic polarization and electrochemical impedance spectroscopy techniques. Equivalent wrought alloy samples were also tested under similar heat-treated conditions for comparison. The results showed that SLM alloys have less corrosion susceptibility, in general, compared with its analogous wrought 7050 alloys. The effects of underaging and overaging on the pitting behavior is also discussed. |