Results 1 to 10 of about 4,177 (246)

Effects of gas flow parameters on droplet spatter features and dynamics during large-scale laser powder bed fusion

Materials & Design, 2023
The droplet spatters generated by the laser induction directly affect the processing quality of the laser powder bed fusion (LPBF) process, gas parameters are a key factor in this process.
Zixin Liu, Yongqiang Yang, Changjun Han, Hanxiang Zhou, Heng zhou, Meng Wang, Linqing Liu, Han Wang, Yuchao Bai, Di Wang   +9 more
doaj   +1 more source

Enhancing the prediction quality of mechanical properties for powder bed fusion with laser beam by dynamic observation of flying particles

Materials & Design, 2023
Complex phenomena occur at the laser spot in powder bed fusion with laser beam (PBF-LB); thus, it creates several large process-parameter spaces such as power and scanning speed, along with many others. To allow for high-throughput parameter exploration,
Keisuke Nagato, Tomohiro Ozawa, Manuela Neuenfeldt, Frederik Zanger, Moju Zhao, Volker Schulze   +5 more
doaj   +1 more source

Prediction of powder bed thickness by spatter detection from coaxial optical images in selective laser melting of 316L stainless steel

Materials & Design, 2022
The uniformity of a recoated powder layer affects the performance of parts manufactured by SLM directly, while it is related to the characteristics of spatters. The small spatter moves pretty fast, while the low optical transmittance in the spectrum of a
Weihao Zhang, Honglin Ma, Qi Zhang, Shuqian Fan   +3 more
doaj   +1 more source

Analysis of Spatter Removal by Sieving during a Powder-Bed Fusion Manufacturing Campaign in Grade 23 Titanium Alloy

Metals, 2021
The Laser-based Powder Bed Fusion (L-PBF) process uses a laser beam to selectively melt powder particles deposited in a layer-wise fashion to manufacture components derived from Computer-Aided Design (CAD) information.
Ryan Harkin, Hao Wu, Sagar Nikam, Justin Quinn, Shaun McFadden   +4 more
doaj   +1 more source

Material Reuse in Laser Powder Bed Fusion: Side Effects of the Laser—Metal Powder Interaction

Metals, 2020
Metal additive manufacturing is changing the way in which engineers and designers model the production of three-dimensional (3D) objects, with rapid growth seen in recent years. Laser powder bed fusion (LPBF) is the most used metal additive manufacturing
Eleonora Santecchia, Stefano Spigarelli, Marcello Cabibbo   +2 more
doaj   +1 more source

Influence of nozzle diameter and gas flow on spatter removal in laser powder bed fusion: A CFD approach

Results in Engineering
In laser powder bed fusion (LPBF), effective spatter removal is vital for maintaining consistent build quality and mechanical properties of the printed part.
Awad B.S. Alquaity
doaj   +1 more source

Large spatter formation mechanism and its influence on surface quality in additive manufacturing process using in-situ monitoring informed solid–liquid–gas coupling simulation

Virtual and Physical Prototyping
Spatter is inherent in laser beam powder bed fusion (PBF-LB), especially large-sized spatter, which is too massive to be effectively removed by the shielding gas flow and thus poses a persistent threat, degrades surface quality.
Xin Lin, Haodong Chen, Chee Kai Chua, Shuhao Wang, Weixin Wang, Kunpeng Zhu   +5 more
doaj   +1 more source

Effects of Welding Time and Electrical Power on Thermal Characteristics of Welding Spatter for Fire Risk Analysis

Energies, 2020
To predict the fire risk of spatter generated during shielded metal arc welding, the thermal characteristics of welding spatter were analyzed according to different welding times and electrical powers supplied to the electrode.
Yeon Je Shin, Woo Jun You
doaj   +1 more source

Simultaneous 3D tracking and temperature measurements of L-PBF spatter particles using a single camera

Additive Manufacturing Letters, 2023
This work discusses the implementation of a novel technique for simultaneous 3D particle tracking velocimetry and dual-wavelength pyrometry of spatter particles ejected during the Laser-Powder Bed Fusion (L-PBF) process using a single high-speed spectral
Dustin Kelly, Ralf D. Fischer, Mahyar Moaven, Sarah Morris, Barton C. Prorok, Brian Thurow   +5 more
doaj   +1 more source

Correlative spatter and vapour depression dynamics during laser powder bed fusion of an Al-Fe-Zr alloy

International Journal of Extreme Manufacturing
Spatter during laser powder bed fusion (LPBF) can induce surface defects, impacting the fatigue performance of the fabricated components. Here, we reveal and explain the links between vapour depression shape and spatter dynamics during LPBF of an Al-Fe ...
Da Guo, Rubén Lambert-Garcia, Samy Hocine, Xianqiang Fan, Henry Greenhalgh, Ravi Shahani, Marta Majkut, Alexander Rack, Peter D Lee, Chu Lun Alex Leung   +9 more
doaj   +1 more source