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Meeting Materials Science & Technology 2020
Symposium Additive Manufacturing of Metals: Complex Microstructures and Architecture Design
Presentation Title Secondary Orientation Preference of Ni-based Superalloy Single Crystals Produced via Electron Beam Melting
Author(s) Patxi Fernandez-Zelai, Michael M Kirka, Yousub Lee, Andres Marquez Rossy, Sebastien Dryepondt
On-Site Speaker (Planned) Patxi Fernandez-Zelai
Abstract Scope Additive manufacturing (AM) enables site specific microstructure control which can be used to optimize the design of high performance components. In recent years a few groups have reported on the fabrication of single crystal Ni-based superalloys via powder bed electron beam melting. While the build direction exhibits a [001] preference, typical for cubic metals, these works all report a strong [011] secondary orientation preference normal to the line scan direction. The physical explanation for this anomalous observation is not yet well understood. In this talk we present an experimental study resulting in the fabrication of single crystals from two commercially available Ni-based superalloy powders. A number of experiments were performed to perturb the printing dynamics to understand the secondary orientation preference. We find that there are two driving forces controlling the secondary orientation; one which preserves epitaxial crystallographic growth and a second driven by the line scan sequence.


Additive Manufacturing of Pure Magnesium
Alloy and Process Modification for Microstructure Control in Additively Manufactured Alloys
Application of Photodiode Sensor for Contour Extraction of Part Features in the Laser Powder Bed Fusion Process
Control of Nanoscale Lamellae in Bulk Al-Cu Eutectic Samples Through Laser Powder Bed Fusion
Cracking in Additively Manufactured Refractory Metals
Engineering the Plasticity of SLM Steel via Crystallographic Texture Control
Evaluation of Microstructure in Multi Bead Ti-6Al-4V
Fabrication of High Temperature High Strength Austenitic Steels by Laser Powder-bed Fusion
Laser Powder Bed Fusion of Single-crystalline-like Stainless Steel 316L; From Samples to Parts
Microstructural Features and Mechanical Properties of a Newly Designed Steel Fabricated by Laser Powder Bed Fusion
Microstructure of Alloy 247LC Manufactured by Laser Powder Bed Fusion
Mitigating Stray Grain Nucleation during the Laser Powder Bed Fusion of Single Crystal CMSX-4
Modeling of Grain Growth in Metal Printing
Secondary Orientation Preference of Ni-based Superalloy Single Crystals Produced via Electron Beam Melting
Synchrotron X-ray Studies on Additive Manufacturing and Materials
The Structure of Cellular Features in Additively Manufactured 316L

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