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Browsing Conference Proceedings and Journals by Author "Abolmaali, Saina"
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Item Location and Orientation Dependency in Surface Roughness of Nickel Super Alloy 625 Parts: Statistical and Distributional Analysis(University of Texas at Austin, 2021) Abolmaali, Saina; Vinel, Alexander; Fox, Jason; Liu, Jia; Silva, Daniel; Shamsaei, NimaSurface roughness is an important characteristic of additively manufactured parts, since it can impact various mechanical properties, such as friction or fatigue life. Further, surface roughness can change significantly depending on a number of factors: part geometry, location on the build platform, process parameters, or powder characteristics. Generally, it has been previously established that printing angle has a significant effect on surface roughness. In this study we reanalyze a dataset constructed based on Laser-Beam Powder Bed Fusion manufactured Nickel super alloy 625 parts. The goal is to evaluate the effect of location and print orientation on the variability of surface roughness, particularly relative to printing angle. Different combinations of location orientation-angles factors are tested using analysis of variance (ANOVA), with some significant findings. In addition, we further consider the question of characterizing surface roughness measures as applied to additive manufacturing and explore distributional analysis (particularly extreme value theory) as a way to qualify these measures.