Defects and anomalies in powder bed fusion metal additive manufacturing

A Mostafaei, C Zhao, Y He, SR Ghiaasiaan… - Current Opinion in Solid …, 2022 - Elsevier
Metal additive manufacturing is a disruptive technology that is revolutionizing the
manufacturing industry. Despite its unrivaled capability for directly fabricating metal parts …

Modelling of 3D concrete printing based on computational fluid dynamics

R Comminal, WRL da Silva, TJ Andersen… - Cement and Concrete …, 2020 - Elsevier
This paper presents a computational fluid dynamic model of 3D Concrete Printing. The
numerical simulation is used to predict the cross-sectional shape of 3D printed segments …

The causal relationship between melt pool geometry and energy absorption measured in real time during laser-based manufacturing

BJ Simonds, J Tanner, A Artusio-Glimpse… - Applied Materials …, 2021 - Elsevier
During laser powder bed fusion additive manufacturing, laser power absorption is governed
by a protean pool of molten metal that can present as a highly reflective surface, a deeply …

[HTML][HTML] A virtual sensing approach for monitoring melt-pool dimensions using high speed coaxial imaging during laser powder bed fusion of metals

LR Goossens, B Van Hooreweder - Additive Manufacturing, 2021 - Elsevier
Metal parts produced by Laser Powder Bed Fusion (L-PBF) are frequently used for
demanding applications. To meet stringent safety and certification requirements, a better …

Tailoring material microstructure and property in wire-laser directed energy deposition through a wiggle deposition strategy

L Gao, J Bhattacharyya, W Lin, Z Ren, AC Chuang… - Additive …, 2023 - Elsevier
Develo** effective strategies to directly control material microstructure, property, and
anisotropy is an active research area in metal additive manufacturing. This work develops a …

[HTML][HTML] Accelerated process parameter selection of polymer-based selective laser sintering via hybrid physics-informed neural network and finite element surrogate …

HP Yeh, M Bayat, A Arzani, JH Hattel - Applied Mathematical Modelling, 2024 - Elsevier
The state of the melt region as well as the temperature field are critical indicators reflecting
the stability of the process and subsequent product quality in selective laser sintering (SLS) …

Physical mechanisms of conduction-to-keyhole transition in laser welding and additive manufacturing processes

YA Mayi, M Dal, P Peyre, M Bellet, R Fabbro - Optics & Laser Technology, 2023 - Elsevier
Thermo-hydrodynamic phenomena which take place during laser welding or additive
manufacturing processes as laser powder bed fusion, have been investigated for years, but …

[HTML][HTML] A novel methodology for investigating the through-thickness molten pool shape during remote laser beam welding

VV Pamarthi, T Sun, A Das, P Franciosa - Optics & Laser Technology, 2024 - Elsevier
Molten pool shape can retrieve information on thermal gradients and solidification rates
which provide substantial process signatures on cracking and weld quality. However …

Modelling the complex evaporated gas flow and its impact on particle spattering during laser powder bed fusion

J Jakumeit, G Zheng, R Laqua, SJ Clark, J Zielinski… - Additive …, 2021 - Elsevier
The additive manufacturing (AM) of metals is becoming an increasingly important production
process with the potential to replace traditional techniques such as casting. Laser Powder …