Additive manufacturing
Papers 1968
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#1Sooraj A.O. Nair (ASU: Arizona State University)H-Index: 4
#2Subhashree Panda (UM: University of Miami)H-Index: 1
Last. Narayanan Neithalath (ASU: Arizona State University)H-Index: 45
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Abstract null null This study aims to relate print velocity to critical parameters extracted from a controlled ram extrusion test, towards a test method to expedite the selection of materials and process parameters for 3D-printing of cementitious materials. Higher print velocities, while aiding faster construction, results in a need for higher extrusion pressure, while lower velocities interfere with extrudate quality through effects such as water filtration. Steady-state pressures and dead-zone...
#6Leila Ladani (ASU: Arizona State University)H-Index: 21
Abstract null null Artificial intelligence (AI) embedded within digital models of manufacturing processes can be used to improve process productivity and product quality significantly. The application of such advanced capabilities particularly to highly digitalized processes such as metal additive manufacturing (AM) is likely to make those processes commercially more attractive. AI capabilities will reside within Digital Twins (DTs) which are living virtual replicas of the physical processes. DT...
Abstract null null Despite the extensive research on the mechanical properties of stainless steel 316 L (SS316L) produced by laser powder bed fusion (LPBF), only a handful of studies have investigated its impact performance even though it is critical for structural applications experiencing rapid loading. In this study, the crystallographic-orientation-dependent Charpy impact behaviours of LPBF-SS316L were systematically investigated. Samples with their longitudinal directions (LDs) along the 〈1...
Abstract null null Additive manufacturing (AM), especially powder bed laser sintering (PBLS), has been an increasingly popular field since the 1980s. Direct SLS is particularly challenging with ceramic materials due to their low thermal conductivity, high melting point, and brittle mechanical behaviour. In addition, they require longer processing times for a reliable sintering degree. In this work, the impact of some crucial parameters in SLS applied to a copper-doped hydroxyapatite bioceramic w...
#1Robert Winkler (Graz University of Technology)H-Index: 15
#2Jason D. Fowlkes (ORNL: Oak Ridge National Laboratory)H-Index: 40
Last. Harald Plank (Graz University of Technology)H-Index: 28
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Abstract null null 3D printing of nanowires using Focused Electron Beam Induced Deposition (FEBID) enables the direct-write fabrication of complex 3D objects on almost any substrate surface. The physical properties of such freestanding structures are determined by the dimensions of constituent nanowires. However, little knowledge is available about the exact shape of the nanowires, which is indispensable for calculations and simulations as well as for optimization in applications. In this study,...
Abstract null null Laser assisted powder bed fusion of Al-40wt.%Si using ultra-short laser pulses is presented. The effects of the pulse duration as well as the pulse energy on the melt pool size, solidification morphology and material properties have been investigated. The experiments have been carried out with a mode-locked fiber laser system delivering pulses from 500 fs up to 800 ps at a wavelength of 1030 nm. Comparative investigations have been performed using a continuous wave Yb-fiber la...
Abstract null null Residual stresses and distortions are major obstacles against the more widespread application of wire arc additive manufacturing. Since the steep temperature gradients due to a moving localised heat source are inevitable in this process, accurate prediction of the thermally induced residual stresses and distortions is of paramount importance. In the present study, a computationally efficient thermo-mechanical model based on a semi-analytical thermal approach incorporating Gold...
Abstract null null The use of 3D printing technology enables the fabrication of optimally shaped and functionally graded structured high-voltage solid insulators that could be used efficiently in power grids owing to their compact size and reliability. However, understanding the layer interface effect is challenging. Therefore, we investigated the layer interface effect on the dielectric breakdown strength of 3D printed rubber insulators. We fabricated acrylic rubber insulators in different lami...
Abstract null null Metallic additive manufacturing produces undesired surface roughness due to the nature of the layer-by-layer fabrication process. As-built surface roughness can accelerate surface crack initiation and result in an early fatigue failure under cyclic loading. Therefore, the effect of surface roughness on the structural integrity of additive manufactured parts needs to be characterized before they can be used in fatigue-critical applications. In this study, the surface roughness ...
#1Alec Saville (Colorado School of Mines)H-Index: 1
#2Sven C. Vogel (LANL: Los Alamos National Laboratory)H-Index: 50
Last. Amy J. Clarke (Colorado School of Mines)H-Index: 23
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Abstract null null Metal additive manufacturing (AM) enables customizable, on-demand parts, allowing for new designs and improved engineering performance. Yet, the ability to control AM metal alloy microstructures (i.e., grain morphology, crystallographic texture, and phase content) is lacking. This work performs corroborative neutron diffraction and large-scale electron backscatter diffraction (EBSD) measurements to assess crystallographic texture in electron beam melted (EBM) Ti-6Al-4V as a fu...
Top fields of study
Ultimate tensile strength
Composite material
Materials science
Selective laser melting