About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
Presentation Title |
Investigation of Mechanical Properties of Corrosion Products in AA7075-T651 Using In Situ Nanoindentation |
Author(s) |
Ankit Kumar, Amey Luktuke, Hamidreza Torbati-Sarraf, Daniel Sinclair, Nikhilesh Chawla |
On-Site Speaker (Planned) |
Ankit Kumar |
Abstract Scope |
Aluminum alloys are widely used for naval applications due to their excellent specific strength; however, this strength is compromised by their susceptibility to corrosion in seawater. The layers of mixed oxides and hydroxides formed in aqueous environment are crucial to the long-term corrosion resistance of aluminum alloys, and correlations between composition and structural integrity will influence future alloy design. In this work, we systematically investigated the corrosion product of the high-strength AA7075-T651 alloy formed in 3.5 wt.% NaCl solution. The thickness, structure, and composition of the product layer were examined at varied immersion times, showing significant heterogeneity on the micro-scale. A novel in situ nanoindentation technique was applied to correlate the product layer’s structure in a hydrated and dehydrated form to the evolution of mechanical properties. The unique insights into the distribution and evolution of corrosion products in the corrosion layer of these alloys was studied and will be discussed. |
Proceedings Inclusion? |
Planned: |
Keywords |
Aluminum, Environmental Effects, Mechanical Properties |