About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
Presentation Title |
Effect of Microstructure on Stress Corrosion Cracking Behavior of Additively Manufactured 7050-based Aluminum Alloy |
Author(s) |
Rupesh Rajendran, Crosby T Owens, Jeffrey D Eisenhaure, David Spain, Alex Kinsey, Preet M. Singh |
On-Site Speaker (Planned) |
Rupesh Rajendran |
Abstract Scope |
Aluminum alloy 7050 is well known candidate for aerospace applications due to its high strength to weight ratio, corrosion and stress corrosion cracking (SCC) resistance, and fracture toughness properties. However, there has been limited studies on understanding the SCC behavior of additively manufactured (AM) high strength aluminum alloys. This work investigates the SCC behavior of AM 7050-based aluminum alloys which were modified to promote equiaxed grain structures with minimal manufacturing-related defects. SCC behavior is studied using slow strain rate tests (SSRT) under dry air, NaCl, and oxidizing environments. The effect of microstructural differences on the SCC behavior as a result of different post-processing and aging conditions are also explored. Results show high SCC resistance of AM 7050-based alloys in general, compared with an equivalent wrought alloy. Post-SCC samples are characterized using SEM-EDS, EBSD, and fractography to correlate microstructural features responsible for higher SCC resistance in AM 7050-based aluminum alloy. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Aluminum, Environmental Effects |