202231 · An introduction to Steels, Additive Manufacturing, Laser Powder Bed Fusion process and their respective applications are presented. • LPBF parameters interplay with respect to complex thermophysical phenomena, solidification theory, evolution of microstructure, and other common issues that arise during LPBF process of steels are
20221127 · Laser powder additive manufacturing (PBF-LB) is an additive manufacturing method capable of producing high-precision and fully dense parts.
Laser-Powder Bed Fusion (L-PBF) is an example of Metal Additive Manufacturing, which fabricates metallic components from metal powders. LPBF applies a direct beam of laser to melt and fuse layers of metal powder particles together [1]. The further excess powder will be removed until the proper shape, according to the Computer-Aided Design (CAD
In this paper, the governing principles of both laser-based subtractive of metals (LB-SM) and laser-based powder bed fusion (LB-PBF) of metallic materials are discussed and
201911 · DOI: 10.1016/J.ADDMA.2018.10.020 Corpus ID: 69373543; In-situ monitoring of laser-based PBF via off-axis vision and image processing approaches @article{Zhang2019InsituMO, title={In-situ monitoring of laser-based PBF via off-axis vision and image processing approaches}, author={Yingjie Zhang and Jerry Ying Hsi Fuh and
2024328 · Laser powder bed fusion (LPBF) is a leading additive manufacturing technique that utilizes a powerful laser to selectively fuse layers of metal powder,
2021729 · As part of an international research project (HiPTSLAM), the development and holistic processing of high-performance tool steels for AM is a promising topic regarding the acceptance of the laser powder
202415 · Laser powder bed fusion ( L -PBF) has emerged as a transformative technology for fabricating complex components with high precision. The microstructure of
202231 · Laser Powder Bed Fusion process is regarded as the most versatile metal additive manufacturing process, which has been proven to manufacture near net shape
202292 · Laser Powder Bed Fusion (L-PBF) is an additive manufacturing process which uses a scanning laser beam to selectively melt metal powder in a layer-wise
Laser Powder Bed Fusion (PBF-LB/M) Laser Powder Bed Fusion is a powder bed based additive manufacturing process that is most widely used in the industry. The Fraunhofer IFAM deals with material and process development along the entire process chain of laser beam melting. Our powder analytics can be used to characterize the flow behavior and
201811 · Among the PBF technologies, Laser-based PBF (L-PBF) processes are currently able to produce metal parts with a complex shape suitable for high demanding applications in space, aerospace, medical, and racing fields [2, 3]. The range of materials available for L-PBF processes is in continuous growth and the mechanical properties of
2021813 · The combined effect of high laser power, fast laser scan speed, and small laser spot size leads to an extremely high heating and cooling rate 41 – 44. According to an in-situ synchrotron experiment on LPBF fabricated Ti-6Al-4V, the maximum heating and cooling rates can reach the orders of 10 6 °C/s and 10 5 °C/s, respectively 45 .
2022618 · Powder bed fusion (PBF) is a 3D printing method that joins powdered material point by point using an energy source, typically a laser beam or an electron beam. Powder bed fusion is one of the most common 3D printing techniques used for industrial additive manufacturing (AM). PBF is possible with both metals and polymers, although
201953 · Core – ion doped, ~ few mm diameter. Cladding – few 100 mm diameter. Optical waveguides. Light guided and amplified in core doped with lasing ions. Er ~ 1.5mm, Yb ~ 1mm. Efficient - up to 40% wall plug efficiency. High average power – 10s – 100s kW. Excellent single mode quality. Low pulse energy – mJ.
Laser beam melting is an additive manufacturing process in which 3D components are digitally "cut" into 2D layers. In a powder bed, the cohesion of the particles is achieved via a high-performance laser that exposes the contours and surfaces of the 2D layers, causing the powder to melt and bond locally at these points.
Selective laser melting method occupies a special place in powder bed fusion technology. The growing widespread interest in this technique is due to its several favorable benefits.
202231 · In general, the nominal laser power and the laser scan velocities are in the range of P ≈ 50–1000 W, and υ ≈ 0.1–3 m/s [97]. The number of factors that influences the overall absorption and local energy distribution includes laser power, wavelength, polarization, angle of incidence, powder temperature, surface roughness, surface
201953 · 9 Making a laser • All laser oscillators (as opposed to amplifiers) have 3 parts: • Gain medium –gas, solid state, liquid –what provides the lasing transition. • Pump –source of energy to create population inversion –usually another light source e.g. flashlamp or another laser, can be electrical discharge or current.