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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 ICME Approach for Designing Appropriate Heat Treatments in Additively Manufactured Nitrogen Atomized 17-4PH Stainless Steel
Author(s) James Zuback, Mark Stoudt, Daniel Gopman, Maureen Williams, Carelyn Campbell
On-Site Speaker (Planned) James Zuback
Abstract Scope Appreciable amounts of dissolved nitrogen in 17-4PH stainless steel introduce metallurgical challenges by stabilizing austenite and inhibiting the formation of martensite during post-process heat treatment. Alloy chemistry variations within specifications can add further complexity and significantly alter the heat treatment response. Here, an integrated computational and experimental approach is used to elucidate the competing factors for designing appropriate post-processing routes beyond ordinary heat treatments for wrought materials. The work focuses on tailoring martensite fractions for a given alloy composition prior to aging. A suite of Calphad based tools are used to track nitrogen distributions, simulate secondary phase precipitation, and predict transformation temperatures during post-processing steps. These results guide targeted experiments to test heat treatment designs, and extensive microstructural characterization provides validation and feedback for improving model predictions. Findings suggest that a universal heat treatment protocol is not suitable for the variety of powder feedstocks and additive manufacturing process combinations available.


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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