About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
|
Symposium
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Additive Manufacturing of Metals: Microstructure, Properties and Alloy Development
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Presentation Title |
Multi-scale Microstructural Characterization of Additively Manufactured 7050 Aluminum Alloy Subjected to Post-processing Treatments |
Author(s) |
Rupesh Rajendran, Crosby T Owens, Jeffrey D Eisenhaure, David Spain, Preet M Singh |
On-Site Speaker (Planned) |
Rupesh Rajendran |
Abstract Scope |
7xxx series aluminum alloy fabricated via laser powder bed fusion (LPBF) process has a huge potential in the aerospace industry due to inherent benefits associated with the additive manufacturing (AM) process and a combination of high-strength, light-weight properties. Inoculant or nanoparticle addition has been shown to promote equiaxed grain growth in these alloys, mitigating hot tearing and solidification defects associated with the columnar grain structure, which limited their adoption. This work presents a modified AM 7050 aluminum alloy having an equiaxed grain structure with minimal defects. Multi-scale characterization using a combination of OM, DSC, SEM, and TEM is done to understand the microstructural features and their correlation with the post-processing treatments such as stress relieving, HIPing and artificial aging. Comparison of results with an equivalent wrought alloy gives insights on post-processing optimization for achieving target properties. |