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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Powder Materials Processing and Fundamental Understanding
Presentation Title Understanding Surface Roughness on Vertical Walls in Laser Powder Bad Fusion Additive Manufacturing
Author(s) Tianyu Zhang, Lang Yuan
On-Site Speaker (Planned) Tianyu Zhang
Abstract Scope In the laser powder bed fusion (LPBF) additive manufacturing process, parameters such as laser scanning speed and power have overarching effects on the development of melt pool and surface roughness, all of which contribute significantly to the final material integrity and mechanical properties. In this study, a wide range of energy densities (calculated based on the laser power, scanning speed, and hatch spacing) on stainless steel 316L powder were systematically investigated experimentally and numerically for cubic samples in LPBF. The correlations between energy density and surface roughness on vertical walls were discussed in detail via examining the melt pool dimensions, microstructural characteristics and surface topography. Mechanisms that drive surface roughness on vertical walls were proposed based on the analysis of partially attached particles and isolated balling effect. Methods to control the surface roughness on vertical walls based on the mechanisms were established and demonstrated in LPBF.
Proceedings Inclusion? Planned:
Keywords Additive Manufacturing, Modeling and Simulation, Characterization

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Bayesian Approach to the Eagar-Tsai Model for Melt Pool Geometry Predictions
Additive Manufacturing of Ionic Liquids Harvested Metal for Martian Habitation
Analysis of Additive Manufacturing Powders' Behaviors Using Discrete Element Method-based Simulation
Challenges Associated with Micro-additive Manufactured 316L and 17-4PH Stainless Steel Components Produced by Binder Jet and Selective Laser Melting
Direct Powder Combination, Consolidation, and Forming of Metals and Composites via Solid-state Additive Manufacturing
Effect of Powder Reuse on Mechanical Behavior of Additively Manufactured Ti-6Al-4V
Electromigration Behavior of Additively Manufactured Copper Wirings
From Ultrafast Sintering with and without Electric Fields to Electrochemically Controlled Microstructural Evolution
Gravitation Effects on Sintering
Gravity-affected Sintering of 3D-printed Powder Components
Inconel 718 Contamination in Ti6Al4V during Powder Bed Fusion
Influence of Powder Reuse in LPBF on the Attributes of SS316L Particles and Powder Beds
Investigating Particle Size-shape Effects on Flowability and Moisture Content of Metallic Powders after Environmental Exposure for Additive Manufacturing Applications
J-47: Induction Sintering of Copper-chromium Powders at Low-pressure Environment
Laser-based, Machine-learning Guided, Additive Manufacturing of Ceramics with Designed Microstructure and Hardness
Microdroplet-based Manufacturing of Metal-organic Frameworks Powder Materials: Fundamentals and Applications
NOW ON-DEMAND ONLY - Optical Analysis of Powder Oxygen Content in Metal Powder Bed Fusion
Particle-based Nanostructured Ceramics for Tailored Functional and Mechanical Properties
Particle Packing in Powder Spreading for Selective Laser Melted Additive Manufacturing Using the Discrete Element Method
Powder Metallurgy Fabrication of ZrHx Moderator and U-ZrHx Moderated Nuclear Fuel
Rapid Solidification Behavior of Cast Ni-based Superalloy IN-100 by EBM Process
Rapid Solidification of Ultrasonically Atomised Aluminium Melt
Redox Chemistry of Surface-engineered CeO2 Nanocrystals: Catalytic and Electrochemical Applications
Silicon Oxycarbide Coatings on Zirconia Microspheres Using a Fluidized Bed Coating Process
Sintering Anisotropy of Binder Jetting 316L
Sintering Based Production of Complex Shapes by the Coupling of Additive Manufacturing and Spark Plasma Sintering
Stable Temperature Regulation in Spark Plasma Sintering Simulations
Surface Chemistry Changes Resulting from Ti-6Al-4V Feedstock Powder Reuse in Electron Beam Additive Manufacturing
Surface Modification of Micro Powders Using Plasma-based Reactors for Sintering of Copper-Chromium Alloys
Synchrotron X-ray Imaging of Cracking during Laser Powder Bed Fusion (LPBF) of Aged CM247 Powder with Varying Oxygen Content
Synthesis and Consolidation of CoCr+X (X=SiC or WC) Milled Powder for Additive Manufacturing
The Effects of Melt Pool Geometry on Microstructure Development during Additive Manufacturing
Transparent Al2O3 Fabricated by Energy Efficient Spark Plasma Sintering
Understanding Mechanisms Behind Morphological Changes in Gas Atomized Powders after Laser Irradiation
Understanding of Agglomeration and Chemical Reactions of CoAl2O4 Inoculants in IN718 Processed by Selective Laser Melting
Understanding Powder Morphology and Its Effect on Flowability in Additive Manufacturing through Machine Learning Techniques
Understanding Surface Roughness on Vertical Walls in Laser Powder Bad Fusion Additive Manufacturing

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