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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 Experimental and Numerical Investigation of Pressureless Sintering for Binder Jetted Metal Parts
Author(s) Kaiwen Zhang, Wei Zhang, Ryan Brune, Xu Zhang, Edward Herderick
On-Site Speaker (Planned) Kaiwen Zhang
Abstract Scope In Binder Jetting Additive Manufacturing, liquid binder is deposited to join powder particles to form near-net shape parts at room temperature. The parts are subsequently sintered at high temperatures. A primary challenge for binder jetting is the large, anisotropic shrinkage resulted from sintering. In this study, a macro-scale finite element analysis considering elastic-viscoplastic constitutive behavior is developed to predict the post-sintering shape of binder jetting printed coupons made of stainless steel 316L. The constitutive equation includes both creep and volumetric swelling strain calculations. Experimentally, cantilever- and bridge-shaped coupons were printed using 316L powder and subsequently sintered. The green-state relative density was determined from the mass and volume of as-printed part. The relative density after sintering was determined by the porosity fraction measured on optical micrographs. The effect of input viscoplastic constitutive properties on the calculated quantities such as dimensional shrinkage, final relative density, and deformed shapes was discussed.


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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