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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Additive Manufacturing: Building the Pathway towards Process and Material Qualification
Presentation Title Validation of Laser Powder Bed Fusion Finite Element Model
Author(s) Li Ma, Kevontrez Jones, Jarred Heigel, Brandon Lane, Richard Ricker, Greta Lindwall, Carelyn Campbell, Lyle Levine
On-Site Speaker (Planned) Li Ma
Abstract Scope The energy that is input from a laser into the part during laser-based powder bed fusion (L-PBF) is focused to a very small spot size and is traversed across the surface of the part at high rate of speed. This leads to extremely high local temperature gradients. These gradients produce complex thermal histories that vary from across the part, generating deleterious microstructure, high residual stress, and defects in the as-built part. Computational models play an important role in the interpretation and prediction of the L-PBD process, however they are challenging to implement due to the complex nature of the L-PBF process. L-PBF single track scans of Ni-based superalloy plates are modeled with both commercial and in-house developed finite element codes. The simulated temperature, scan track melt pool geometry, and residual stresses are compared to measurements made using high speed in-situ thermography, optical measurements of polished cross-sections, and x-ray diffraction, respectively.
Proceedings Inclusion? Planned: Supplemental Proceedings volume


A-23: Additive Manufacturing on Satellites: Current State, Future Applications, Gaps and Needs, and Transition Strategies
A-24: AM Informatics – Optimizing Additive Manufacturing through Effective Use of Materials and Process Information
A-25: Applied Machine Vision and Machine Learning to the Characterization and Qualification of Additive Manufacturing Powder Feedstock
A-27: Effect of Build Geometry on the Microstructure and Tensile Properties of 17-4 PH Stainless Steel Parts Prepared by Selective Laser Melting
A-30: The Influence of FDM Build Parameters on the Mechanical Properties of 3D-printed ABS
A-31: Understanding Properties and Effects of Reused Metal Powder in the LENS DED Process
A Comparison of the Microstructures, Tensile Properties, and Fatigue Crack Growth Mechanisms in Ti-6Al-4V Alloys Fabricated by Three Powder-Based Additive Manufacturing Technologies
A Low Cost, High-speed Optical Monitoring System for Tracking Spatter during Laser Powder Bed Fusion
A Methodology for Statistics Based Qualification for Selective Laser Melting of Metals
Accelerating Qualification of Additively Manufactured Metal Parts
Additive Manufacturing of Aluminosilicate-polymer and Carbon Composites
Additive Manufacturing of Three-dimensional Carbon Microlattices
Assessment of the Material Performance upon Additive Manufacturing – Are Post-treatments Always Required?
Automated Material, Geometry and Process Qualification in Metal Melting Based Additive Manufacturing Technologies Using Experimentally Validated Simulation Tools
Characterization of Strut, Node, and Cell Geometry and Mechanical Properties in 3D EBM Printed Ti64 Lattices
Controlling Bulk Residual Stresses in SLM by 3D Laser Shock Peening
Correlating Pore Defect Formation in Laser Powder Bed Fusion Processing with In Situ Thermal and Interferometric Optical Measurement
Correlation of In-situ Process Monitoring Data to Material Properties and the Technologies Potential Impacts on AM Process Qualification
Defect Detection in LENS AM Using In Situ Thermal Camera Process Monitoring
Defect Signatures for Metal Laser Powder Bed Fusion
Design-to-component, Closed-loop ICME Research and Development for Additively Manufactured Alloys
Effect of Build Process Environment on Selective Laser Melted Inconel 718
Effects of Laser Beam Intensity Profile on the Evolution of Microstructure and Defects in 316L SS Components Fabricated via Laser Engineered Net Shaping
Finite Element Modelling of the Laser Metal Directed Energy Deposition Process
From Art-to-part: Multidisciplinary Virtual Toolset for Laser Powder-bed Fusion Additive Manufacturing and Multi-Step Post Processing Certification
Healing Defects within Powder Bed Fabrication
High-speed Synchrotron X-ray Imaging of Laser Powder Bed Fusion Process
High-Temperature Tensile, Creep and Microstructural Characterization of Additively Manufactured 15-5 PH Stainless Steel
High-throughput Testing and Characterization of Novel Additive Manufacturing Processes and Properties
High Speed Imaging of Particle-melt Interactions in Laser Directed Energy Deposition (L-DED)
In-situ Neutron Diffraction Measurements for Isolating Microstructural Effects on Mechanical Properties of As-built AM 304L SS
In Situ and Real-time Investigation of AM Process by Combining High-speed X-ray Imaging, Acoustic and Optical Sensors and Machine Learning
In Situ Synchrotron X-ray Diffraction and Tomography for Time-resolved Study of Phase and Structure Evolution during Consolidation of AM Metals
Influence of Processing in Selective Laser Melting on Cracking and Microstructure of Nickel Alloy Inconel 738LC
Investigating Stress Relaxation Behavior and Mechanisms in Ti- and Ni-alloys by In Situ Neutron Diffraction: Application to Additive Manufacturing
Issues of Spatter during Laser Powder Bed Fusion of Nickel-base Superalloys
Material Qualification for Desktop Metal's AM Processing
Mechanical Properties of AM Metals
Modeling the Life Cycle of High throughput Tensile Specimens Produced by Laser Powder Bed Fusion: From Fabrication to Performance
Net Shape 3D Printed NdFeB Permanent Magnet
Online Monitoring of Powder Bed Fusion Processes and Validation of Numerically Predicted Heating and Cooling Rates - Implications on As-built Work Piece
Parameter Development of Wire-based Laser Metal Deposition and Characterization of Ti6Al2Sn4Zr2Mo
Predicting Deformation and Cracking as a Function of Additive Manufacturing Process Parameters
Process-structure-property Relationships of Additively Manufactured Model Sandstone
Qualification of Wire + Arc Additive Manufacture: Challenges and Outlook
Quasi In Situ Investigation of Microstructure Evolution in Additively Manufactured Layers
Reshaping Casting Industry by Additive Manufacturing
Revealing Martensite Decomposition in Ti-6Al-4V Alloys Additively Manufactured with Electron Beam Melting by X-ray and Neutron Diffraction
Structure / Property (Constitutive and Dynamic Strength / Damage) Characterization of Additively Manufactured (AM) Tantalum
The Impact of Powder Feedstock Variability on Microstructure and Defects in Selective Laser Melted Superalloy 718
The Role of Different Hot Isostatic Pressing and Post Heat Treatment Routes for SLM -built Alloy 718
Three Dimensional Characterization of AM 316L Stainless Steel
Validation of Laser Powder Bed Fusion Finite Element Model
Visualizing the Melt Pool and Void Formation in Ti Alloys Using Synchrotron-based X-ray Microscopy
(Some of) The ICME Building Blocks to Qualify the Process and Materials of Additive Manufacturing

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