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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Advances in Additive Manufacturing of Titanium and Titanium Based Alloys
Presentation Title Understanding Light-matter Interaction, Melt Pool Dynamics and Spatter Formation in Laser Powder Bed Fusion Processing
Author(s) Manyalibo Matthews, Andrew Anderson, Nicholas Calta, Philip Depond, Gabe Guss, Saad Khairallah, Wayne King, Tien Roehling, Alexander Rubenchik, Johannes Trapp, Sheldon Wu
On-Site Speaker (Planned) Manyalibo Matthews
Abstract Scope In laser powder bed fusion additive manufacturing, complex hydrodynamics driven by vapor recoil and Marangoni convection lead to liquid metal interfaces that are steeply curved thereby affecting Fresnel absorptivity. Changes in absorptivity due to melt pool motion can lead to fluctuations in energy coupling which drive excursions in melt pool depth, microstructure and local residual stress. To clarify the complex physics involved, a laser calorimetric test bed is developed equipped with high speed optical and thermal imaging and used to study changes in energy coupling as a function of laser parameters for bulk metal plates and metal powder layers of titanium and other alloy systems. Hydrodynamic finite element modeling is used to simulate the melt pool morphology and dynamics, providing insight to energy coupling, keyholing and spatter generation mechanisms. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Fully Integrated Model for the Prediction of Location-specific Yield Strength in Electron Beam Additively Manufactured Ti-6Al-4V
A History of Titanium Additive Manufacturing for Air Vehicle Structures
Additive Manufacturing in a High Temperature Environment with Sensor Monitoring to a Closed-loop In-situ Feedback Control
Additive Manufacturing of Ti-Cu Alloys
Addressing the Challenges for Additively Manufacturing Ti-6Al-4V Components for Structural Applications
Characterization of Titanium Interpenetrating Phase Composites Formed through Additive Manufacturing and Spark Plasma Sintering
Coupling Laser Path Planning to the Formation Lack of Fusion Defects on Top Layers of Abbreviated Builds in Direct Metal Laser Melting of Ti-6Al-4V
Development of Bio-compatible Beta Ti Alloy Powders for Additive Manufacturing of for Application in Patient-specific Orthopaedic Implants
Development of Post-Processing Technologies to Improve the Reliability of Additively Manufactured Titanium Alloy Components
Effect of Build Direction on Microstructure and Tensile Properties of Ti-6Al-4V Sheet Fabricated by Selective Electron Beam Melting
Effect of Geometry on the Porosity and Microstructure of Additively Manufactured Titanium
Effect of Scan Patterns on Microstructure Evolution of Ti6Al4V Alloy
Effects of Beam Focus and Shape on Microstructure and Defect Characteristics in an E-beam AM Ti-6Al-4V Alloy: A Synchrotron X-ray Micro-CT Study
ICME Design, Modeling, and Accelerated Qualification of Additively Manufactured Ti-based Alloys
In-situ Investigation of Microstructure Evolution during Annealing in Ti-6Al-4V Alloy Produced by Additive Manufacturing
In-situ Microstructural Control in Ti-6Al-4V during Selective Laser Melting – from Fine Acicular α' Martensite to Various Forms of Lamellar α+β
Insight on Process Development of Titanium Aluminide Alloy(s) during Laser In-situ Alloying
Intrinsic Heat Treatment of Titanium Alloys during Selective Laser Melting
Investigating Sources of Porosity in Electron Beam-based Directed Energy Deposition of Titanium Components
Investigation of Fabrication of Ti64 Components Using Hybrid Additive Manufacturing
Microstructure Characterisation and Mechanical Properties of Ti-6Al-4V with Grain Refinement Made by Direct Laser Fabrication
Microstructure, Defect and Mechanical Properties of gamma TiAl alloys Additively Manufactured by Selective Electron Beam Melting
Modeling the Effects of Alloying on Microstructure Formation under Additive Manufacturing Conditions
Non-destructive Characterization of Porosity Distributions in Additively-manufactured Ti Parts
Numerical and Experimental Study of As-built Powder Bed Fused Ti6Al4V Component
Optimization of Additive Manufacturing Process for Ti-6Al-4V via Integrated Computational Materials Engineering and Sequential Minimum Energy Design Approach
Platforms for High throughput Structure-property Characterizations to Support Machine Learning Approaches to Additive Manufacturing
Predicting the Solidification Microstructure of Pulsed-LPBF Ti-6Al-4V Alloy Using Phase-field Modelling
Processing Modalities of Ti-6Al-4V Fabricated via Additive Manufacturing
Scientifically Based Probability Modeling for Additive Manufacturing of Ti-6Al-4V
Sensitivity of Ti-6Al-4V Components to Oxidation during out of Chamber Wire Arc Additive Manufacturing
Solid-state Additive Manufacturing and Repair of Titanium Alloys
Structure Evolution and Strain Relaxation in Biocompatible Ti-6Al-4V Alloys Manufactured by Selective Laser Melting with Different Built Orientation
Swedish Initiatives for Additive Manufacturing of Titanium Alloy Components for Aerospace Applications
The Effect of Boron on the Grain Size and Texture in Additively Manufactured β-Ti Alloys
The Effects of Electrically-assisted Ultrasonic Nanocrystal Surface Modification on 3D-printed Ti-6Al-4V Alloy
Thermodynamic Database for Multi-component Ti-Based Alloys and TiAl-based Materials
Ti-6Al-4V by Selective Laser Melting: How Microstructure and Porosity Influence the Mechanical Properties
Titanium Based Metal-matrix Composites via In-situ Nitridation: Microstructure and Tribological Properties
Tuning Microstructural Evolution in Additively Manufactured Ti Alloys Using High throughput Experimental Approaches
Understanding Light-matter Interaction, Melt Pool Dynamics and Spatter Formation in Laser Powder Bed Fusion Processing
Validation of a High Integrity Joining/ Repair Process for Aerospace Materials

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