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Meeting Additive Manufacturing Benchmarks 2022 (AM-Bench 2022)
Symposium Additive Manufacturing Benchmarks 2022 (AM-Bench 2022)
Presentation Title Elimination of Solidification Cracking in AA 6061 Alloy During the Laser Powder Bed Fusion Additive Manufacturing Process
Author(s) Sivaji Karna, Rimah Al-Aridi, Tianyu Zhang, Timothy Krentz, Dale Hitchcock, Andrew Gross, Lang Yuan
On-Site Speaker (Planned) Lang Yuan
Abstract Scope AA 6061 is a high-strength heat treatable aluminum alloy used in various applications such as aerospace and automotive industries. Solidification cracking is one of the dominant defects in the printing of AA 6061 alloy via laser powder bed fusion (L-PBF) additive manufacturing. In this study, AA 6061 cubes were printed with a range of laser power, scanning speed, hatch spacing, and substrate temperature to establish the correlation between the process parameters and the solidification cracking behaviors. In parallel, a L-PBF process model of the melt pool formation was coupled with solidification cracking criteria to interpret the experimental observations and assist the experimental design in eliminating solidification cracks. Tensile samples with selected process parameters resulting in different levels of solidification cracking were printed to investigate their mechanical properties and failure mechanisms. Finally, the process window for crack-free AA6061 and the anticipated mechanical properties are proposed.
Proceedings Inclusion? Undecided

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

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AM Bench 2022 Macroscale Tensile Challenge at Different Orientations , Part 1: Measurement Description
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AM Bench 2022 Subcontinuum Mesoscale Tensile Challenge , Part 1: Measurement Description
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Analysis of Existing Hot Tearing Tests and Their Transferability to Additive Manufacturing
Benchmarking Machine Learning Modeling Approaches to Additive Manufacturing Research, Development, and Qualification
Characterization of Laser Powder Bed Fusion Surfaces
Characterizing the Post-build Microstructures of the AM Benchmark Artifacts
Combining Fractal and Topological Analyses to Quantify Fracture Surfaces in Additively Manufactured Ti-6Al-4V
Combining Modeling & Measurement in Metals Additive
Combining Multi-Physics Simulations with Data-Driven Models for Accelerated AM Process Prediction
Computational Materials for Qualification and Certification (CM4QC) Steering Group
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Cross-sectional Melt Pool Geometry of Laser-Scanned Tracks and Pads for the 2022 Additive Manufacturing Benchmark Challenges
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Decoupling the Effect of Geometry and Texture on the Mechanical Response of Additively Manufactured IN625 Thin-walled Elements
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Digitally Twinned Additive Manufacturing: Real-time Detection of Flaws in Laser Powder Bed Fusion by Combining Thermal Simulations with In-situ Meltpool Sensor Data
Effect of Process-specific Defects on the Tensile and Constant-amplitude Tatigue Behavior of As-built Ti-6Al-4V Alloy Produced by Laser Powder Bed Fusion Process
Elastic Residual Strain Measurements of 3D Additive Manufacturing Builds of IN718 AM-Benchmark Artifact: An Overview and Comparison Between Measurement Techniques and Submitted Simulation Results
Elimination of Solidification Cracking in AA 6061 Alloy During the Laser Powder Bed Fusion Additive Manufacturing Process
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In-situ Characterization of Melt Pool Dynamics by High-speed Synchrotron X-ray Imaging and Diffraction
In-situ Heat Treatment of Additively Manufactured Ti-6Al-4V
In-situ Monitoring of the Laser Powder Bed Fusion Process by Thermography, Optical Tomography, Melt Pool Monitoring and Eddy Current Testing for Defect Detection
In-situ Observation of the Extrusion Processes of Acrylonitrile Butadiene Styrene and Polylactic Acid for Material Extrusion Additive Manufacturing
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In Situ High-energy X-ray Diffraction during Compression of Additively Manufactured Inconel 625 at Temperature
Integrated Monte Carlo Microstructure and Analytical Temperature Simulations of Additive Manufacturing
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On-line Melt Pool and Microstructure Sensing of Powder Bed Fusion Grade 91 Stainless Steel
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