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Meeting Materials Science & Technology 2020
Symposium Additive Manufacturing: Alloy Design to Develop New Feedstock Materials
Presentation Title Residual Stress Mitigation of Additive Manufactured Stainless Steel 316L Components through the Directed Energy Deposition Inclusion of TiC Nanoparticles
Author(s) Jakob D. Hamilton, Samantha Sorondo, Andrew Greeley, Denis Cormier, Iris V. Rivero
On-Site Speaker (Planned) Jakob D. Hamilton
Abstract Scope Directional solidification in directed energy deposition (DED) additive manufacturing (AM) often leads to detrimental residual stresses (RS) and thermal distortion in as-fabricated components. Residual stresses exacerbate cyclic loading and reduce the fatigue life of DED components. Recent efforts to mitigate residual stresses in DED include altering deposition parameters and inclusion of ceramic reinforcements. These particles act as nucleation sites and disrupt columnar grain growth from rapid material solidification. This work explores how the inclusion of TiC nanoparticles in the build of stainless steel 316L AM components affects RS distribution. Nondestructive residual stress measurement through x-ray diffraction yielded that components possessing TiC nanoparticles exhibited compressive residual stresses near TiC agglomerates. Likewise, the TiC distribution was found to depend on DED parameters, thus providing a method to affect residual stress patterns in AM metal composite components. This work quantifies modification of residual stresses in AM through the direct inclusion of TiC nanoparticles.


3D Characterization of Cracks Formed in “Weldable” AA6061 and Implications for Alloy Design
Accidental Alloy Development: In-situ Evolution of AM Powder and Opportunities for New Material Synthesis Pathways
An Interdisciplinary Approach for Alloy Design for Additive Manufacturing
Application of Taguchi, Response Surface, and Artificial Neural Networks for Rapid Optimization of Direct Metal Laser Sintering Process
CALPHAD Informed Design of Rare-earth Containing Alloys for Additive Manufacturing
Characterization of Spatter with Organized Features in Laser Powder Bed Fusion
Development of Oxidation Resistant Multi-Principle Element Alloys Applied with Additive Manufacturing
High-Throughput Accelerated Alloy Development
Laser Additive Manufacturing of Nanocomposite Powders
Mechanical Alloying of Feedstock Powder for Additive Manufacturing by Selective Laser Melting: Aluminum Alloy Matrix Composites
Micro-crack Mitigation by Alloy Modification in the Additively Manufactured Ni-base Superalloy CM247LC
Microstructure and Property Variability in DED Inconel 718 as a Function of Build Rate
Opportunities to Improve the Mechanical Properties of Titanium Alloys Produced by Laser Powder Bed Fusion
Optimization of Nitrogen-Atomized 17-4 Stainless Steel Feedstock for AM Processing
Processing of Y2O3-modified Nickel Superalloy by Selective Laser Melting.
Residual Stress Mitigation of Additive Manufactured Stainless Steel 316L Components through the Directed Energy Deposition Inclusion of TiC Nanoparticles
Sensitivity Analysis and Composition Design for Metal Additive Manufacturing Using CALPHAD-based ICME Framework

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