Journal ArticleDOI
In-situ monitoring of melt pool images for porosity prediction in directed energy deposition processes
Mojtaba Khanzadeh,Sudipta Chowdhury,Mark A. Tschopp,Haley Doude,Mohammad Marufuzzaman,Linkan Bian +5 more
- Vol. 51, Iss: 5, pp 437-455
Reads0
Chats0
TLDR
A novel porosity prediction method based on the temperature distribution of the top surface of the melt pool as an AM part is being built is proposed and is able to predict the location of porosity almost 96% of the time when the appropriate SOM model using a thermal profile is selected.Abstract:
One major challenge of implementing Directed Energy Deposition (DED) Additive Manufacturing (AM) for production is the lack of understanding of its underlying process–structure–property relationshi...read more
Citations
More filters
Journal ArticleDOI
Machine learning in additive manufacturing: State-of-the-art and perspectives
TL;DR: A comprehensive review on the state-of-the-art of ML applications in a variety of additive manufacturing domains can be found in this paper, where the authors provide a section summarizing the main findings from the literature and provide perspectives on some selected interesting applications.
Journal ArticleDOI
Mechanistic models for additive manufacturing of metallic components
TL;DR: In this article, the authors focus on the available mechanistic models of additive manufacturing (AM) that have been adequately validated and evaluate the functionality of AM models in understanding of the printability of commonly used AM alloys and the fabrication of functionally graded alloys.
Journal ArticleDOI
Using machine learning to identify in-situ melt pool signatures indicative of flaw formation in a laser powder bed fusion additive manufacturing process
Luke Scime,Jack Beuth +1 more
TL;DR: In this article, a visible-light high speed camera with a fixed field of view is used to study the morphology of L-PBF melt pools in the Inconel 718 material system.
Journal ArticleDOI
Directed energy deposition (DED) additive manufacturing: Physical characteristics, defects, challenges and applications
David Svetlizky,Mitun Das,Baolong Zheng,Alexandra L. Vyatskikh,Susmita Bose,Amit Bandyopadhyay,Julie M. Schoenung,Enrique J. Lavernia,Noam Eliaz +8 more
TL;DR: Directed energy deposition (DED) is a branch of additive manufacturing (AM) processes in which a feedstock material in the form of powder or wire is delivered to a substrate on which an energy source such as laser beam, electron beam, or plasma/electric arc is simultaneously focused, thus forming a small melt pool and continuously depositing material, layer by layer as discussed by the authors.
Journal ArticleDOI
Porosity prediction: Supervised-learning of thermal history for direct laser deposition
TL;DR: In this paper, a real-time porosity prediction method is developed using morphological characteristics of the melt pool boundary (i.e., features obtained via functional principal component analysis (FPCA)).
References
More filters
Journal ArticleDOI
Laser powder-bed fusion additive manufacturing: Physics of complex melt flow and formation mechanisms of pores, spatter, and denudation zones
TL;DR: In this paper, the effect of the recoil pressure and Marangoni convection in laser powder bed fusion (L-PBF) of 316L stainless steel was demonstrated. And the results were validated against the experiments and the sensitivity to laser absorptivity was discussed.
Book
Computed Tomography: Principles, Design, Artifacts, and Recent Advances
TL;DR: Introduction Preliminaries Image Reconstruction Image Presentation Key Performance Parameters of a CT Scanner Major Components of CT scanner Image Artifacts: Appearances, Causes, and Corrections Computer Simulation and Analysis.
Computed Tomography: Principles, Design, Artifacts, and Recent Advances, Fourth Edition
TL;DR: Introduction Preliminaries Image Reconstruction Image Presentation Key Performance Parameters of a CT Scanner Major Components of CT scanner Image Artifacts: Appearances, Causes, and Corrections Computer Simulation and Analysis.
Journal ArticleDOI
Steady state columnar and equiaxed growth of dendrites and eutectic
TL;DR: In this article, an analysis for the growth of equiaxed grains ahead of the columnar front during directional solidification is presented, and the model considers both single-phase and eutectic growth.
Journal ArticleDOI
An overview of Direct Laser Deposition for additive manufacturing; Part I: Transport phenomena, modeling and diagnostics
TL;DR: A detailed overview of the thermal/fluid properties inherent in the direct laser deposition (DLD) process can be found in this article, with a focus on the mechanical properties and microstructure of parts manufactured via DLD.
Related Papers (5)
Process defects and in situ monitoring methods in metal powder bed fusion: a review
A Review on Process Monitoring and Control in Metal-Based Additive Manufacturing
Gustavo Tapia,Alaa Elwany +1 more