Journal ArticleDOI
Adhesion effects on spreading of metal powders in selective laser melting
Reads0
Chats0
TLDR
In this article, a discrete element method (DEM) model is used to examine the powder spreading process, focusing on the effects of particle adhesion and particle-based behaviors, and the results show that particle adhesiveness can reduce powder packing density and smoothness of the powder bed surface.About:
This article is published in Powder Technology.The article was published on 2020-03-01. It has received 62 citations till now. The article focuses on the topics: Metal powder & Selective laser melting.read more
Citations
More filters
Journal ArticleDOI
Binder jet 3D printing—Process parameters, materials, properties, modeling, and challenges
Amir Mostafaei,Amy M. Elliott,John E. Barnes,Fangzhou Li,Wenda Tan,Corson L. Cramer,Peeyush Nandwana,Markus Chmielus +7 more
TL;DR: In this paper, a detailed review of the physical processes during 3D printing and the fundamental science of densification after sintering and post-heat treatment steps are provided to understand the microstructural evolution and properties of binder jetted parts.
Journal ArticleDOI
Influences of powder morphology and spreading parameters on the powder bed topography uniformity in powder bed fusion metal additive manufacturing
Andre Mussatto,Robert Groarke,Aidan O’Neill,Muhannad Ahmed Obeidi,Yan Delauré,Dermot Brabazon +5 more
TL;DR: In this article, the influence of particle morphology, spreading velocity and layer thickness on the powder bed topography uniformity has been investigated with a laser powder bed fusion printer and the powder layers were spread systematically and comprehensively.
Journal ArticleDOI
Effects of spreader geometry on powder spreading process in powder bed additive manufacturing
TL;DR: In this paper, the effects of various spreader geometries on powder spreading are examined by discrete element method (DEM) and the results show that a compact region in the powder pile exists.
Journal ArticleDOI
Dynamic investigation on the powder spreading during selective laser melting additive manufacturing
TL;DR: In this paper, a 3D particulate scale dynamic simulations were carried out to study the spreading of 316L stainless steel powder during printing by using discrete element method (DEM), and the influences of various factors including processing parameters, blade shape, and powder size on the quality of the spread powder bed were investigated in terms of both macroscopic packing density/uniformity and microstructure/micro dynamics.
Journal ArticleDOI
Experimental analysis of powder layer quality as a function of feedstock and recoating strategies
TL;DR: In this article, the authors proposed a method to assess powder bed quality as a function of both powder conditions and recoating strategies, which relies on the powder bed scanner technology, which provides particle-level resolution images of the entire powder layer as it is recoated.
References
More filters
Book
Intermolecular and surface forces
TL;DR: The forces between atoms and molecules are discussed in detail in this article, including the van der Waals forces between surfaces, and the forces between particles and surfaces, as well as their interactions with other forces.
Journal Article
Discrete numerical model for granular assemblies.
Peter Cundall,Otto D. L. Strack +1 more
TL;DR: The distinct element method as mentioned in this paper is a numerical model capable of describing the mechanical behavior of assemblies of discs and spheres and is based on the use of an explicit numerical scheme in which the interaction of the particles is monitored contact by contact and the motion of the objects modelled particle by particle.
Journal ArticleDOI
A discrete numerical model for granular assemblies
Peter Cundall,Otto D. L. Strack +1 more
TL;DR: The distinct element method as mentioned in this paper is a numerical model capable of describing the mechanical behavior of assemblies of discs and spheres and is based on the use of an explicit numerical scheme in which the interaction of the particles is monitored contact by contact and the motion of the objects modelled particle by particle.
Journal ArticleDOI
Metal Additive Manufacturing: A Review
TL;DR: The state-of-the-art of additive manufacturing (AM) can be classified into three categories: direct digital manufacturing, free-form fabrication, or 3D printing as discussed by the authors.
Journal ArticleDOI
The London—van der Waals attraction between spherical particles
TL;DR: In this article, the London-v.d. interaction between two spherical particles is computed as a function of the diameters and the distance separating them, and a table is calculated which enables numerical application of the formulae derived.