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 |
Isolated Influence of Upward and Downward Facing Surface Roughness on the Fatigue Life of Laser Powder Bed Fusion Ti-6Al-4V
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Author(s) |
Jason Rogers, Martin Leary, Ma Qian, Chris Wallbrink, Joe Elambasseril |
On-Site Speaker (Planned) |
Jason Rogers |
Abstract Scope |
A fundamental relationship between surface roughness, inclination angle and fatigue strength has not been established for laser powder bed fusion (L-PBF) Ti-6Al-4V. Not all L-PBF components can be post-processed to address the inherently rough surface finish, including lattice and hollow structures. However, surface roughness is understood to be detrimental to the fatigue life of L-PBF components. Therefore, a thorough understanding of the impact of inclination angle on surface roughness and consequently, fatigue life is required for the design of fatigue-limited components with as-manufactured surfaces. This work aims to predict the fatigue strength of a component based on the manufactured inclination angle and expected surface roughness. This is derived from the experimental fatigue data of L-PBF Ti-6Al-4V samples manufactured at six different inclination angles with an as-manufactured surface finish. In each fatigue test, either the upward or downward facing surface was polished to isolate the influence of corresponding roughness. |
Proceedings Inclusion? |
Planned: |
Keywords |
Titanium, Mechanical Properties, Other |