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Meeting Materials Science & Technology 2020
Symposium Additive Manufacturing of Metals: Complex Microstructures and Architecture Design
Presentation Title Application of Photodiode Sensor for Contour Extraction of Part Features in the Laser Powder Bed Fusion Process
Author(s) Yuri Plotnikov, Mark White, Kyle Snyder, Marcus Thoreson, John Sions
On-Site Speaker (Planned) Yuri Plotnikov
Abstract Scope Metal additive manufacturing (AM) allows parts of highly complex geometry to be built to near exact shape from digital drawings and build instructions. Commercial viability of using laser powder bed fusion (L-PBF) technology to repair parts or to build upon traditionally manufactured parts is challenged by difficulties in aligning the existing part with the internal coordinate system of the AM machine. A team of CCAM researchers has created a novel solution, which uses the processing laser at low power levels to extract the contour of a part and construct a virtual part position map inside the build coordinate system. This solution utilizes the surface reflection on the part from laser beam exposure, allowing the reflected light to be captured by a fast-responding photosensor. The sensor signal is digitized at a high sampling rate and parsed into a two-dimensional map that can be used to align features within print software.


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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