Results 51 to 60 of about 27,449 (284)

Physics-Based Predictive Model of Lack-of-Fusion Porosity in Laser Powder Bed Fusion Considering Cap Area

Crystals, 2021
This work proposed a computationally efficient analytical modeling strategy to calculate the product porosity in laser powder bed fusion (LPBF) induced by a lack-of-fusion defect, with the consideration of cap area in solidified molten pools, influence ...
Wenjia Wang, Steven Y. Liang
doaj   +1 more source

Bulk single-crystal-like IN738 alloy fabricated using laser powder bed fusion by controlling the thermal flow

Materials Research Letters
This study demonstrates the fabrication of a bulk crack-free superalloy specimen with a predominantly {001} single-crystalline-like texture using laser powder bed fusion (LPBF).
Xiangyu Li, Yufan Zhao, Yiqi Peng, S. Shi, Kunyu Liu, Guangyao Xu, Yuchao Lei, Nannan Lu, Hao Wang, Xin Lin   +9 more
semanticscholar   +1 more source

Deep Transfer Learning of Additive Manufacturing Mechanisms Across Materials in Metal-Based Laser Powder Bed Fusion Process

Journal of Materials Processing Technology, 2022
The defective regimes in metal-based Laser Powder Bed Fusion (LPBF) processes can be minimized by deploying in-situ monitoring strategies comprising Machine learning (ML) algorithms and sensing techniques.
V. Pandiyan, R. Drissi-Daoudi, S. Shevchik, Giulio Masinelli, Tri Le-Quang, R. Logé, K. Wasmer   +6 more
semanticscholar   +1 more source

Eutectic Superalloys for Laser Powder Bed Fusion [PDF]

Due to the small freezing range of eutectic alloys, the Cotac-type alloys might be viable alternatives to conventional Ni-based superalloys when processed through additive manufacturing. Laser-pass assessment reveals that both Cotac-74 and Cotac-744 display improved cracking resistance when compared to the conventional Ni-based superalloy CM247LC ...
Christofidou, K.A., Wilson, A.S., Markanday, J.F.S., Pickering, E.J., Church, N.L., Miller, J.R., Jones, N.G., Jones, C.N., Stone, H.J.   +8 more
openaire   +2 more sources

Sustainable Additive Manufacturing: An Overview on Life Cycle Impacts and Cost Efficiency of Laser Powder Bed Fusion

Journal of Manufacturing and Materials Processing
This overview study investigates integrating advanced manufacturing technologies, specifically metal additive manufacturing (AM) and laser powder bed fusion (LPBF) processes, within Industry 4.0 and Industry 5.0 frameworks, to enhance sustainability and ...
R. Rahmani, Bashir Bashiri, Sérgio I. Lopes, Abrar Hussain, H. S. Maurya, Raivo Vilu   +5 more
semanticscholar   +1 more source

Dynamics of pore formation during laser powder bed fusion additive manufacturing

Nature Communications, 2019
Laser powder bed fusion additive manufacturing is an emerging 3D printing technique for the fabrication of advanced metal components. Widespread adoption of it and similar additive technologies is hampered by poor understanding of laser-metal ...
Aiden A. Martin, N. Calta, S. Khairallah, Jenny Wang, P. Depond, A. Fong, V. Thampy, G. Guss, Andrew M. Kiss, K. Stone, Christopher J. Tassone, Johanna Nelson Weker, M. Toney, T. van Buuren, M. Matthews   +14 more
semanticscholar   +1 more source

Keyhole fluctuation and pore formation mechanisms during laser powder bed fusion additive manufacturing

Nature Communications, 2021
Keyhole porosity is a key concern in laser powder-bed fusion (LPBF), potentially impacting component fatigue life. However, some keyhole porosity formation mechanisms, e.g., keyhole fluctuation, collapse and bubble growth and shrinkage, remain unclear ...
Yuze Huang, Tristan G. Fleming, S. Clark, S. Marussi, K. Fezzaa, J. Thiyagalingam, C. L. Leung, Peter D. Lee   +7 more
semanticscholar   +1 more source

Melt pool temperature and cooling rates in laser powder bed fusion

Additive Manufacturing, 2018
In laser powder bed fusion, melt pool dynamics and stability are driven by the temperature field in the melt pool. If the temperature field is unfavourable defects are likely to form.
P. Hooper
semanticscholar   +1 more source

Progress in metallic powders for laser powder bed fusion

Metal Powder Report, 2023
A review of powder characterization, preparation and reuse.
openaire   +1 more source

An Empirical Model and Feedforward Control of Laser Powder Bed Fusion

ASME Letters in Dynamic Systems and Control, 2023
Abstract Reliable process control for the laser powder bed fusion process, especially at the melt pool scale, remains an open challenge. One of the reasons for this is the lack of suitable control-oriented models and associated control design strategies. To address this issue, this paper (1) identifies an empirical control-oriented model
Aleksandr Shkoruta, Bumsoo Park, Sandipan Mishra   +2 more
openaire   +2 more sources