Directed energy deposition(DED) covers a range of terminology (Gibson et al., 2010):laser engineered net shaping, directed light fabrication, directmetal deposition, and 3D-laser cladding. A typical DED machine consists of a nozzle mounted on a multiaxis appendage, which deposits the melted mater...
所谓直接能量沉积3D打印-DED技术(Direct energy deposition),是指由激光在沉积区域产生熔池并高速移动,材料以粉末或丝状直接送入高温熔区,熔化后逐层积的一种激光直接能量沉积增材制造技术。该技术囊括激光、等离子、电子束几种不同的热源,材料包括粉末或丝状两种主要的形态。旗下技术类型可分为LENS激光工程网状透镜(La...
Predicting the melt pool temperature distribution and history in direct energy deposition (DED) is crucial for estimating the microstructure, porosity, and mechanical properties of DED-fabricated metal parts. While analytical and numerical modeling methods have been introduced to predict the melt pool tem...
The CAD model of the part is sliced into 2D layers, and each contoured layer’s data is transferred onto the machine. Parts are built through a directed solidification of the metal powder using a high-energy electron beam or laser power. 2D data, which is a simpler representation of a ...
2e). To further confirm the effect of the microelectric field stemming from the pore structure, we prepared a fully compacted PAN-30 fiber membrane using a tablet machine with a pressure of 30 MPa and used it as the collector for direct electronetting. Removal of the pore structure of ...
The official Journal of Science Press and the Dalian Institute of Chemical Physics, Chinese Academy of Sciences.TheJournal of Energy Chemistryis a publication that mainly reports on creative researches and innovative applications of chemical conversions of fossil energy, carbon dioxide, … ...
Photo- and thermo-activated reactions are dominant in Additive Manufacturing (AM) processes for polymerization or melting/deposition of polymers. However, ultrasound activated sonochemical reactions present a unique way to generate hotspots in cavitation
The objective of this paper was the numerical simulation of the reconstruction of mechanical components using a directed energy deposition additive manufacturing process. Before simulating the repair of the gear through the DED process, a preliminary simulation was carried out to validate the numerical ...
The multirotor wind turbine concept offers an alternative to increasing the power output of the machine by combining multiple rotors into a single wind turbine. This configuration has been assessed to be 80% of the cost of an equivalent power rate single rotor wind turbine and over 8% higher ...
electrophoretic deposition; solid oxide fuel cell; thin-film electrolyte membrane; anode-supported cell; doped CeO2; doped BaCeO3; deposition kinetics; sintering kinetics; densification1. Introduction Electrochemical energy devices such as solid oxide fuel cells (SOFCs) have attracted many efforts of ...