About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
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Symposium
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Special Session
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Presentation Title |
Locational Dependency of Additively Manufactured Parts: Effects of Surface Roughness on Fatigue Behaviors |
Author(s) |
Seungjong Lee, Muztahid Muhammad, Jingyi Zheng, Shuai Shao, Nima Shamsaei |
On-Site Speaker (Planned) |
Seungjong Lee |
Abstract Scope |
Surface roughness (SR) can vary significantly when parts are fabricated at different locations on the build plate build because of the gas flow and powder recoating process in current additive manufacturing techniques. In this study, intra-build SR variation across locations was investigated for laser beam powder bed fused 316L stainless steel. The build platform was divided into 4 quadrants to assess the location-dependent variation of SR. Uniaxial stress-controlled fatigue tests were conducted using a servo-hydraulic system. The SR from the four quadrants was analyzed using One-way Analysis of Variance (ANOVA) method and further verified SR's location dependency. Linear regression analysis was also performed to correlate fatigue lives with SR values at different stress amplitudes. ANOVA analysis revealed that there are statistically significant differences in SR values across different locations. Linear regression was also successful in correlating fatigue lives with SR and stress amplitudes. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |