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Meeting Materials Science & Technology 2020
Symposium Additive Manufacturing of Metals: Complex Microstructures and Architecture Design
Presentation Title Evaluation of Microstructure in Multi Bead Ti-6Al-4V
Author(s) Amaranth Karra, Ali Guzel, Hangman Chen, Amit Kumar Verma, Anthony D. Rollett
On-Site Speaker (Planned) Amaranth Karra
Abstract Scope Ti-6Al-4V printed by laser-hot-wire robotic welding is used for calibrating a model predict the properties based on machine parameters and this contains the thermal, microstructural and strength mode. Different geometries such as multi-beads, T-sections and overhangs produces different thermal histories. The microstructure contains fine Widmanstätten colony and basketweave α with coarse columnar β grains. The thermal cycles produced by multiple passes result in approximately equidistant bands and a transient region in the top. This work primarily quantified the banding and α morphologies using optical and scanning electron microscopy. XRD was used for the variation of c/a ratio and lattice parameters. An automated technique was developed using python to calculate α lath thickness from SEM images. The results of, and methodology developed for data acquisition and analysis will be discussed.


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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