Results 241 to 250 of about 431,646 (304)

Process mechanisms based on powder flow spatial distribution in direct metal deposition

Journal of Materials Processing Technology, 2018
Hua Tan, Fengying Zhang, Adam T Clare
exaly   +2 more sources

A Methodology for Optimization of the Direct Laser Metal Deposition Process

Key Engineering Materials, 2011
Direct Laser Metal Deposition (DLMD) is actually one of the most attractive techniques in the group of Material Accretion Manufacturing (MAM) processes. In fact, the DLMD technology is able to realize, to repair and restore, objects, moulds and tools, directly from the 3D CAD model in a rapid and economic way. A great variety of metals, including those
Angelastro, A., Campanelli, S. L., Casalino, G., Ludovico, A. D., Ferrara, S.   +4 more
openaire   +1 more source

Laser Direct-Metallization of Silicon Carbide without Metal Deposition

MRS Proceedings, 2003
AbstractLaser direct-write (LDW) is used forin-situmetallization in single crystal 4H- and 6H-SiC wafers without metal deposition. Nanosecond-pulsed Nd:YAG (λ= 1064 and 532 nm) and excimer (λ = 193, 248 and 351 nm) lasers are utilized to create metal-like conductive phases in both n-type and p-type SiC wafers.
Salama, I. A., Kar, A., Quick, N. R.
openaire   +2 more sources

Simulation of laser attenuation and heat transport during direct metal deposition considering beam profile

Journal of Materials Processing Technology, 2019
A laser-powder coupling model for direct metal deposition (DMD) with discontinuous powder feeding is presented based on homogeneous transformation, Lambert-Beer law and energy balance.
Wu Jiazhu, Tongwei Liu, Chen Huanyu, Fazhi Li, Haiying Wei, Yi Zhang   +5 more
semanticscholar   +1 more source

Modelling and validation of a direct metal deposition nozzle

ICALEO 2009: 28th International Congress on Laser Materials Processing, Laser Microprocessing and Nanomanufacturing, 2009
Laser direct metal deposition (LDMD) will only achieve its full potential as an additive manufacturing process when a connection between the process parameters used, the microstructure created and the properties of a particular metal deposit can be established.
Weijing He, Lijuan Zhang, Paul Hilton
openaire   +1 more source

Generation of metal patterns by topography-directed deposition

Microelectronic Engineering, 2010
In this work, we present a method for fabricating high-resolution metal arrays based on the topography-mediated electrochemical deposition (ECD) process. By this approach, silver arrays of 200nm feature size can be obtained with the mediation of microscale patterns on silicon wafer.
Dianpeng Qi, Nan Lu, Bingjie Yang, Hongbo Xu, Miaojun Xu, Lifeng Chi   +5 more
openaire   +1 more source

Microstructure and phase evolution in γ-TiAl/Ti2AlNb dual alloy fabricated by direct metal deposition

Intermetallics (Barking), 2019
As a potential material used in aero-engine, a γ-TiAl/Ti2AlNb dual alloy was fabricated by depositing γ-TiAl alloy on a Ti2AlNb alloy plate using direct metal deposition (DMD) technique.
Yu Wu, Xu Cheng, Shuquan Zhang, Dong Liu, Hua-ming Wang   +4 more
semanticscholar   +1 more source

Effects of electromagnetic field on the laser direct metal deposition of austenitic stainless steel

Optics and Laser Technology, 2019
The effects of applying electric and magnetic fields (static and rotating) on the laser direct metal deposition of austenitic stainless steel were investigated. The results showed that the laser-induced plasma was strongly affected by the electromagnetic
Lu Yi, Sun Guifang, Wang Zhandong, Zhang Yongkang, B. Su, A. Feng, Z. Ni   +6 more
semanticscholar   +1 more source

Transport phenomena during direct metal deposition

Journal of Applied Physics, 2007
The evolution of temperature and velocity fields during direct metal deposition with coaxial powder injection was simulated using a self-consistent three-dimensional model based on the solution of the equations of mass, momentum, energy conservation, and solute transport in the liquid pool.
X. He, J. Mazumder
openaire   +1 more source

Uncertainty quantification of grain morphology in laser direct metal deposition

Modelling and Simulation in Materials Science and Engineering, 2019
Uncertainty quantification (UQ) has an important role to play in the quality control of additively manufactured products. With a focus on laser direct metal deposition (LDMD), this work presents a systematic UQ framework to quantify the uncertainty of ...
Paromita Nath, Zhen Hu, S. Mahadevan
semanticscholar   +1 more source