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Meeting Materials Science & Technology 2020
Symposium Additive Manufacturing: Materials, Alloy Development, Microstructure and Properties
Presentation Title Understanding The Influence of Porosity and Microstructure On Mechanical Behavior in Additive Manufactured 316L Stainless Steel Using In-situ X-ray Computed Tomography and Electron Microscopy
Author(s) Aeriel D. Murphy-Leonard, David Rowenhorst, Richard Fonda
On-Site Speaker (Planned) Aeriel D. Murphy-Leonard
Abstract Scope Three-dimensional techniques such as x-ray micro-computed tomography (XCT) enable the ability to fully visualize and quantify porosity and provide fundamental relationships between pore size and morphology on mechanical behavior and damage evolution. In the current study, the influence of pore and void size, morphology, and distribution on crack initiation, growth, and coalescence during tensile and cyclic loading was examined using a lab based XCT system and in-situ synchrotron XCT. The material examined was additively manufactured (AM) 316L stainless steel. The specimens were produced using laser powder bed fusion techniques where the gauge diameter was 1 mm. Static XCT revealed that in conditions where the cross-sectional area is small majority of the porosity was in-homogeneously distributed where a higher distribution of porosity was found near the surface which is commonly seen in additively manufactured materials. It was also determined that cracks initiated at near surface defects in the specimen during fatigue.

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

3D Characterization of Intrinsic Defects in Water- and Gas- Atomized 17-4 PH Stainless Steel Powder Precursors for Additive Manufacturing
A New Sintering Process for Binder-Jet Printed 625 Alloy
Additive Manufacturing of Metallic Materials: Mechanical Properties
Additive Manufacturing of Nuclear Spacer Grids
Characterization of the Balling Ddefect during Laser Powder Bed Additive Manufacturing
Co-design of Parts and Processing for Thin-walled Structures Produced via Laser Powder Bed Fusion
Effect of Atomization and Processing Gas on Microstructures in Additively Manufactured 17-4PH Stainless Steel
Effect of Heat Treatment on Additively Manufactured Ni-based Superalloys
Failure Evolution and Mechanisms in Additively Manufactured Stainless Steel 316L Under Dynamic Loading Conditions
Grain Orientation Analysis of Additively Manufactured 316L Stainless Steel
Influence of the Surface Condition on the Fatigue Performance of Alloy UNS N07718 Produced via Selective Laser Melting
Investigating the Mechanical, Microstructural, Corrosion and Impact Performances of a New Steel Composition, Produced by Tandem WAAM Mixing of Steel Wires
Mapping Relationships between Process Parameters, Microstructure, and Properties for Wire Feed – DED of Ti-6Al-4V
Mesoscale crystallographic texture control via beam path sequencing in electron beam melting
Metal Powder Recyclability within Binder Jet Additive Manufacturing Process
Microstructural Evolution and Mechanical Properties of Cast and Additive Manufactured AlSi10Mg at Different Heat-treated Conditions
Microstructure Analysis of Laser Additive Manufactured 316L Stainless Steel
Microstructure and Corrosion Characteristics of 316L Stainless Steel Fabricated by Laser Powder Bed Fusion Process
Microstructure and Mechanical Property of Additively Manufactured Zr-modified AA6061 Alloy
Microstructure and Property of Additively Manufactured Nickel-based Superalloy
Multi-objective Optimization of Binder Jetting Process Parameters for the Co-Cr-Mo Alloy
Prediction and validation of successful multi-material AM interfaces
Process and Characterization of 3D-printed Copper
Reparation of Co-based Parts Using Additive Manufacturing Technologies
Sintering and Alloying Kinetics of Particle-Based Ink Extruded Nickel-Based Scaffolds
Structural Characterization of Wire and Arc Additive Manufactured (WAAM) Austenitic Stainless Steel
Toward In-Situ Flaw Detection in Laser Powder Bed Fusion Additive Manufacturing
Understanding The Influence of Porosity and Microstructure On Mechanical Behavior in Additive Manufactured 316L Stainless Steel Using In-situ X-ray Computed Tomography and Electron Microscopy

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