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Meeting MS&T21: Materials Science & Technology
Symposium Additive Manufacturing of Metals: ICME Gaps: Material Property and Validation Data to Support Certification
Presentation Title An Analysis of the Dislocation Density of Inconel 718 Additive Manufacturing Powder
Author(s) Colby Azersky, Sangho Jeon, Peggy Cebe
On-Site Speaker (Planned) Colby Azersky
Abstract Scope Understanding and controlling the atomic dislocation density of metallic powders used for additive manufacturing processes is vital for the production of high fidelity additively manufactured parts. One-dimensional line defects are particularly important to the material properties of an additively manufactured part because these defects control yield stress and deformation behavior. Since these dislocations were introduced to the powder during the initial solidification, it is critical to investigate how undercooling and cooling rate affects the amount of internal dislocations. When these metallic powders are manufactured, their rapid cooling subjects them to significant undercooling during the solidification process. Multiple size ranges of Inconel 718 powder were evaluated using two different diffractometers to determine the relationship between cooling rate, undercooling and dislocation density. Line profile analysis of the X-ray diffraction patterns showed a significant increase in dislocation density at smaller particle sizes for both facilities.


An Analysis of the Dislocation Density of Inconel 718 Additive Manufacturing Powder
An ICME Approach for Designing Appropriate Heat Treatments in Additively Manufactured Nitrogen Atomized 17-4PH Stainless Steel
Capturing and Analyzing In-situ Data within the Directed Energy Deposition Process with DEDSmart
CFD Modelling for AM Processes
Critical Issues and Gaps in Testing and Characterization Data for Computational Materials in Qualification and Certification of Additively Manufactured Metallic Materials
Determining Data Requirements to Quantify Porosity in the Laser Powder Bed Fusion Process
Enabling Quality Assurance by Completing the Process-Property-Performance Paradigm for Additive Manufacturing
Experimental and Numerical Investigation of Pressureless Sintering for Binder Jetted Metal Parts
High Temperature Material Properties Measurement Capabilities of the NASA MSFC Electrostatic Levitation (ESL) Laboratory
High Temperature Material Property Data and Challenges to Thermal Process Model Predictions and In-Situ/Ex-Situ Measurements for Metallic Additive Manufacturing
ICME Gap Analysis for Materials Design and Process Optimization in Additive Manufacturing
ICME Gaps for Additive Manufacturing of Metals
Laser Energy Coupling during Metal Additive Manufacturing
Lessons Learned from Calibration and Validation of Process Models for Laser Powder Bed Fusion
Methods for Improved Part-scale Thermal Process Simulations in Laser Powder Bed Fusion
On Scan Path Knowledge for Model Informed Process Planning and Material Quality Predictions
Phase Field Informed Monte Carlo Texture Evolution Models for Additive Manufacturing Microstructure Simulation and the Need for Experimental Grain Competition Data
Predicting Melt Properties Using Atomistic Simulations with a Highly Accurate Physically Informed Neural Network Interatomic Potential
Providing a Rigorous Measurement Foundation for Modeling-Informed Qualification and Certification of Metal AM Components
Transferability of Terrestrial Development of Metal Additive to Extraterrestrial Applications

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