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Showing 1 to 20 of 29 for “"LPBF"”.
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Phase Transformation and Mechanical Behavior of Laser Powder Bed Fusion (LPBF) Manufactured Co-28Cr-6Mo
This thesis analyzes how laser powder bed fusion (LPBF) additive manufacturing print settings affect the phase transformation properties, tensile mechanical properties, microstructure, and fracture behavior of Co-28Cr-6Mo. Four different LPBF print settings were analyzed and compared in this study, …
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Laser Powder Bed Fusion (LPBF) of a Complex Aerospace Component: Effects of Layerwise Process Control on Part Quality
… research concerns the laser powder bed fusion (LPBF) metal additive manufacturing (AM) process. The goal is to optimize critical processing parameters for a complex LPBF part. Currently, LPBF process qualification relies on empirical parameter experiments and rigorous materials characterization. …
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Characterization and Improvement of Powder Properties Through Plasma Spheroidization for use in the Laser Powder Bed Fusion Process
… powder behavior in the Laser Powder Bed Fusion (LPBF) process. One of the shortcomings of LPBF process is the high cost of gas-atomized powder feedstock. To overcome this downside, the cheaper water-atomized powder was characterized and used in LPBF process, and its performance was compared with …
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Prediction and Control of Thermal History in Laser Powder Bed Fusion
… metal parts using the laser powder bed fusion (LPBF) additive manufacturing (AM) process. As a step towards this long-term goal, the goal of this work is to predict and control the thermal history of an LPBF part. The thermal history is the spatiotemporal distribution of temperature in an LPBF …
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Characterization of the Surface Roughness of Overhangs manufactured by Laser Powder Bed Fusion Process using Design of Experiments
Metal Laser Powder Bed Fusion (M-LPBF) is a method of additive manufacturing that enables the fabrication of complex components that would not be possible through conventional manufacturing methods. M-LPBF is well suited for aerospace applications not only because of its ability to fabricate …
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Laser Powder Bed Fusion Process Characterization: Design of Experiments for Dimensionally Accurate Thin Walls
Metal Laser Powder Bed Fusion (M-LPBF) is a method of additive manufacturing that enables the fabrication of complex components that would not otherwise be possible through conventional manufacturing techniques. M-LPBF is well suited for aerospace applications because of its ability to fabricate …
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Framework to Accelerate Parameter Development for Laser Powder Bed Fusion
Metal Laser Powder Bed Fusion (M-LPBF) is a method of additive manufacturing that enables the fabrication of complex components that would not be possible through conventional manufacturing methods. M-LPBF is well suited for aerospace applications not only because of its ability to fabricate …
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Development of in-situ radiometric inspection methods for quality assurance in laser powder bed fusion
<p>“Laser Powder Bed Fusion (LPBF) metal Additive Manufacturing (AM) fabricates 3D metal parts layer-by-layer. The process enables production of geometrically complex parts that are difficult to inspect with traditional methods. The LPBF parts experience significant geometry driven thermal …
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Computational-Experimental Process Development for Laser Powder Bed Fusion Additive Manufacturing
Laser powder bed fusion (LPBF) additive manufacturing (AM) is instrumental for advances in high-value industries such as aerospace and medical devices. However, widespread adoption is still held back, in part due to challenges with powder handling, identification of process parameters, part …
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Exploration of a new manufacturing process for improving mechanical properties in a hot extruded Al-Mg-Si alloy
… explores the use of laser powder bed fusion (LPBF), an additive manufacturing method, to fabricate billets for subsequent hot-extrusion. LPBF enables rapid heating and cooling of a material over a very short period. This rapid solidification can effectively suppress the formation of coarse …
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Laser Powder Bed Fusion Additive Manufacturing of Fe-based Shape Memory Alloys for Biomedical Applications
… issues by employing laser powder bed fusion (LPBF) additive manufacturing (AM) to fabricate Fe-30Mn-6Si biodegradable alloys with tailored degradation behaviours and mechanical properties. Specifically, this thesis systematically investigates the effects of LPBF process parameters—including …
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Smart Process Design with Machine Learning for Quality Assurance in Metal Additive Manufacturing
… (AM), particularly Laser Powder Bed Fusion (LPBF), has revolutionized the fabrication of complex metal components through its layer-by-layer construction capability. However, the widespread adoption of LPBF remains limited by recurring defects such as porosity, residual stresses, and …
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Predicting microstructural heterogeneities in the laser powder bed fusion of γ′ strengthened nickel-base superalloys
… during the laser powder bed fusion (LPBF) of CM247LC, a nickel-base superalloy with high γ′ content and hence, highly prone to weld-cracking. Multiple cracking mechanisms have been identified as active in the LPBF of various precipitation-strengthened superalloys. However, there is no …
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Evaluation of stress state on the mechanical properties of 3D printed metallic lattice structures fabricated via laser powder bed fusion for orthopedic applications
… implants, specifically Laser Powder Bed Fusion (LPBF). Once implanted, these devices experience complex stress states under physiological loading. To design these structures to mimic the mechanical behavior of bone, their performance under these conditions must be understood. The characterization …
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Characterization of the fatigue behavior of additively manufactured β-metastable titanium alloy Ti-5Al-5V-5Mo-3Cr on different length scales
… made by laser powder bed fusion of metals (LPBF-M), with distinct microstructures resulting from different heat treatments. The nano-scale investigation reveals how the α-precipitates orientation and distribution influence the deformation behavior of Ti-5553 in the (α+β)-solution annealed …
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Design and Commissioning of a Hybrid Additive Manufacturing System Combining Inkjet Deposition and Laser Powder Bed Fusion
… inkjet printing with laser powder bed fusion (LPBF) for manufacturing compositionally graded components is presented. In the hybrid inkjet-LPBF process, a pattern of ink is deposited in a two-dimensional pattern to dictate compositionally modified regions prior to, or following, the spreading …
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Physics-informed Machine Learning for Digital Twins of Metal Additive Manufacturing
… processes, including laser powder bed fusion (LPBF) and additive friction stir deposition (AFSD). The proposed three methods are as follows 1. Process improvement requires mapping the process parameters with ex-situ quality measurements. These mappings often tend to be non-stationary, with …
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Tailoring Mechanical Properties and Porosity in Laser Powder Bed Fusion by Spatial Manipulation of Feedstock Composition
… deposition followed by laser powder bed fusion (LPBF) is studied, and the technique is demonstrated in exemplary contexts. To begin, a rapid experimental workflow is developed, whereby etched metal substrates are used as templates for spreading a thin layer of metal powder; spreading is preceded …
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Comportamiento frente a distintas formas de corrosión de una aleación de al-mg-sc-zr de interés aeronáutico para fabricación aditiva
… del equipo de Laser Powder Bed Fusion (LPBF) localizado en la Escuela Superior de Ingeniería (ESI) de la UCA. Además, el grupo cuenta con la certificación por parte de APWORKS para fabricar mediante LPBF piezas de Scalmalloy®. De esta forma, nuestro laboratorio es uno de los 16 centros a …
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The design and study of a vapor chamber fabricated via laser powder bed fusion
Laser Powder Bed Fusion (LPBF) was utilized to create aluminum alloy (i.e., AlSi10Mg) specimens for two related sets of experiments for this study. The first was a series of 5-mm-diameter support pillars with a fixed height of 5 mm containing varying filet angles and build orientations (i.e., 0˚, …
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