Journal ArticleDOI
Powder flowability and density ratios: the impact of granules packing
TLDR
In this paper, a new flowability criterion based on a novel technique to determine a high packing density was proposed, which is more sensitive to differences in flowability, as quantified by the repose angle.About:
This article is published in Chemical Engineering Science.The article was published on 2003-07-01. It has received 222 citations till now. The article focuses on the topics: Angle of repose.read more
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Additive manufacturing of metallic components – Process, structure and properties
Tarasankar Debroy,Huiliang Wei,J.S. Zuback,T. Mukherjee,John W. Elmer,John O. Milewski,Allison M. Beese,Alexander E. Wilson-Heid,Amitava De,Wei Zhang +9 more
TL;DR: A review of the emerging research on additive manufacturing of metallic materials is provided in this article, which provides a comprehensive overview of the physical processes and the underlying science of metallurgical structure and properties of the deposited parts.
Journal ArticleDOI
The metallurgy and processing science of metal additive manufacturing
TL;DR: In this article, a review of additive manufacturing (AM) techniques for producing metal parts are explored, with a focus on the science of metal AM: processing defects, heat transfer, solidification, solid-state precipitation, mechanical properties and post-processing metallurgy.
Journal ArticleDOI
Additive manufacturing
TL;DR: Marshall has unique expertise in leveraging new digital tools, 3D printing, and other advanced manufacturing technologies and applying them to propulsion systems design and other aerospace materials to meet NASA mission and industry needs.
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The relationship between attractive interparticle forces and bulk behaviour in dry and uncharged fine powders
TL;DR: The physics of granular materials in ambient gases is governed by interparticle forces, gas-particle interaction, geometry of particle positions and geometry of particles contacts as mentioned in this paper, which are strongly dependent on the external forces, boundary conditions and on the assembling procedure.
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Dry particle coating for improving the flowability of cohesive powders
TL;DR: In this paper, the magnetic assisted impaction coater (MAIC) and the hybridizer (HB) were used to coat cornstarch powder with different size silica particles and the improvement in flowability was determined from angle of repose measurements using a Hosokawa powder tester.
References
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Theory of yield of cohesive powders
TL;DR: In this article, a rechnerisch auswertbare Modell-Vorstellung entwickelt for Haftkraft-tragung is presented, in which the Steigerung der in den Partikelkontakten ubertragenen haftkrafte with zunehmender Verfestigung is investigated.
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The packing of spheres in a cylindrical container: the thickness effect
Ruiping Zou,Aibing Yu +1 more
TL;DR: In this paper, an experimental investigation has been carried out to quantify the wall effect on porosity for uniform spheres packed in cylindrical containers and the results indicate that the side wall effect should be composed of two components: the top-bottom wall effect or the thickness effect, and accurate determination of porosity and/or porosity-related properties should consider both of them.
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The thickness of the shear zone of flowing granular materials
R.M. Nedderman,C. Laohakul +1 more
TL;DR: In this paper, the velocity profiles in the flow of coarse granular materials from parallel sided bins were measured and it was established that in the upper part of the bin the material is in plug flow except for narrow shear zones adjacent to the walls.
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Measurement of flow properties of bulk solids
TL;DR: Flowability can best be described by using the flow function as being the relationship between the unconfined yield strength and the major principal stress at steady state flow as mentioned in this paper. But exact measurement of flow function is possible only with testers, and expensive regarding time and equipment.
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Crystallization of non-Brownian Spheres under Horizontal Shaking
TL;DR: In this paper, it has been shown that denser crystalline arrangements can be obtained when beads are poured at low flow rates into a horizontally shaken container and a parallel is suggested between this process and that of colloidal sedimentation which also yields crystalline structure.