Quantification and prediction of lack-of-fusion porosity in the high porosity regime during laser powder bed fusion of Ti-6Al-4V
Patcharapit Promoppatum,Patcharapit Promoppatum,Raghavan Srinivasan,S.S. Quek,Sabeur Msolli,Sabeur Msolli,Shashwat Shukla,Nur Syafiqah Johan,Sjoerd Van Der Veen,Mark H. Jhon +9 more
TLDR
In this paper, the authors compare three common strategies to measure porosity: the Archimedes, micrograph-based, and micro-computed tomography approaches and find that while these methods work equally well at low void fraction, their predictions diverge at higher void fractions (> 5 %).About:
This article is published in Journal of Materials Processing Technology.The article was published on 2022-02-01 and is currently open access. It has received 20 citations till now. The article focuses on the topics: Porosity & Fusion.read more
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Multi-scale defects in powder-based additively manufactured metals and alloys
TL;DR: In this paper , a review of multi-scale defects in AMed metals and alloys are identified and for the first time classified into three categories, including geometry related, surface integrity related and microstructural defects.
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An overview of modern metal additive manufacturing technology
TL;DR: A comprehensive overview of the essential features of metal additive manufacturing techniques based on the most recent scientific knowledge is provided in this article , which explores emerging research on four of the most significant technologies, including material extrusion (ME), binder jetting (BJ), powder bed fusion (PBF), and DED.
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Local prediction of Laser Powder Bed Fusion porosity by short-wave infrared imaging thermal feature porosity probability maps
TL;DR: In this paper , the porosity from a cylindrical specimen is measured by ex-situ micro-computed tomography (μCT), combined with the microCT data, are used to generate thermal feature-based porosity probability maps.
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Modulating fracture toughness through processing-mediated mesostructure in additively manufactured Al-12Si Alloy
TL;DR: In this paper , a multiscale cohesive zone-based computational model and a semi-analytical approach for kinked cracks are used to investigate the effect of melt pool configuration on fracture energy enhancement and anisotropy due to crack path tortuosity.
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Mechanical and fluid characteristics of triply periodic minimal surface bone scaffolds under various functionally graded strategies
TL;DR: In this article , the authors carried out a comprehensive numerical and experimental assessment on the impact of graded IWP structures on the effective elastic modulus, Gaussian curvature, permeability, and fluid-induced wall shear stress.
References
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Image processing with ImageJ
TL;DR: ImageJ is an open source Java-written program that is used for many imaging applications, including those that that span the gamut from skin analysis to neuroscience, and can read most of the widely used and significant formats used in biomedical images.
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A new finite element model for welding heat sources
TL;DR: In this article, a double ellipsoidal geometry is proposed to model both shallow penetration arc welding processes and the deeper penetration laser and electron beam processes, which can be easily changed to handle non-axisymmetric cases such as strip electrodes or dissimilar metal joining.
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Analysis of defect generation in Ti–6Al–4V parts made using powder bed fusion additive manufacturing processes
TL;DR: In this article, the defect characteristics are discussed with respect to defect generation mechanisms; and effective process windows for SLM and EBM system are discussed. But they do not consider the defect generation mechanism.