About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Additive Manufacturing Fatigue and Fracture: Effects of Surface Roughness, Residual Stress, and Environment
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Presentation Title |
Post-Processing Surface Finishing of Additively Manufactured Aluminum and Titanium Alloys for Optimal Mechanical and Corrosion-Resistance Performance |
Author(s) |
Joshua R. Boykin, Agustin Diaz, Patrick McFadden, Justin Michaud |
On-Site Speaker (Planned) |
Joshua R. Boykin |
Abstract Scope |
Metal additive manufacturing (AM) is revolutionizing many industries, promising production time/cost reductions, complex design/parts, and advanced lightweight materials, such as aluminum- and titanium-based alloys. However, as-built metal AM components have considerable surface and near-surface defects: such as roughness, waviness, porosity, partially sintered powders, etc. These defects reduce component mechanical performance, leading to early failure and use risks. The work presented herein adapts technology developed for specific use on various aluminum and titanium alloys. This surface finishing technology is a combination of chemical polishing and chemical-mechanical polishing able to remediate all surface-related defects and impart significant mechanical and corrosion-resistance improvements. The developed process can uniformly remove up to 500 μm, achieving a defect-free surface with a submicron surface roughness Ra/Rq. Furthermore, with exceptional outcomes, chemical polishing has been applied for surface finishing internal channels and non-line-of-sight surfaces. Part of this work was funded by USAF (SBIR-FA864921P0815 and SBIR-FA864920P0930). |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Surface Modification and Coatings, Aluminum |