Results 61 to 70 of about 13,736 (216)

Additive Manufacturing of Hot‐Work Tool Steel by In Situ Alloying Using Laser Powder Bed Fusion and Directed Energy Deposition—Strategies to Improve Chemical Homogeneity

steel research international, EarlyView.
To support future alloy development a powder mixture is processed by laser additive manufacturing. The powder mixture containing Mo‐ and W‐rich tracers is processed by powder bed fusion using single and double laser exposure and by directed energy deposition which provides drastically enlarged melt pools.
Felix Großwendt, Sebastian Weber, Jonathan Lentz   +2 more
wiley   +1 more source

Finite Element Modeling (FEM) of the thermal behavior of 3D printed parts during Directed Energy Deposition (DED)

Incertitudes et Fiabilité des Systèmes Multiphysiques
Additive manufacturing (AM) is an innovative and promising technology that can create complex geometries with great precision. However, parts manufactured using this technology exhibit residual stresses and distortions, which hinder widespread ...
Adnane Zoubeir, Bouchaib Radi
doaj   +1 more source

Late Miocene – Early Pleistocene paleogeography of the onshore central Hawke’s Bay sector of the forearc basin, eastern North Island, New Zealand, and some implications for hydrocarbon prospectivity [PDF]

, 2008
The timing of trap formation in relation to the timing of source rock burial and maturation are important considerations in evaluating the hydrocarbon prospectivity of onshore parts of the forearc basin in central Hawke’s Bay.
Bland, Kyle J., Kamp, Peter J.J., Nelson, Campbell S.   +2 more
core  

On the electric conductivity of highly ordered monolayers of monodisperse metal nanoparticles

, 2009
Monolayers of colloidally synthesized cobalt-platinum nanoparticles of different diameters characterized by TEM (transmission electron microscopy) were deposited on structured silicon oxide substrates and characterized by SEM (scanning electron ...
Fromsdorf, Andreas, Greshnykh, Denis, Klinke, Christian, Weller, Horst   +3 more
core   +1 more source

A Comparative Study of Directed Energy Deposition‐Arc and Casting: Enhancing Mechanical and Thermal Properties of Hot‐Work Tool Steels

steel research international, EarlyView.
The study investigates the influence of DED‐Arc/M versus casting on the microstructure and material properties of X40CrMoV5‐1 (AISI H13) hot‐work tool steel. DED‐Arc/M yields finer microstructures, superior mechanical strength, and ductility, but slightly reduced thermal conductivity.
Ulf Ziesing, Aaron Berger, Hendric Schaefer, Sebastian Weber, Jonathan Lentz   +4 more
wiley   +1 more source

HWTS 50 Tool Steel Tailored for Laser Powder Bed Fusion: Sliding Wear of Bare Surfaces and Nitriding Response in Comparison with 18Ni300 and AISI H13

steel research international, EarlyView.
This work investigates the wear resistance and nitriding behavior of PBF‐LB/M‐processed Osprey HWTS 50, a lean hot work tool steel. Three heat treatment conditions are compared to conventional wrought H13, H11, and PBF‐LB/M 18Ni300. The study highlights HWTS 50's enhanced nitrogen diffusion, deeper nitriding hardness depth, and comparable or improved ...
Jonathan Hann, Giorgia Lupi, Sylvain Dossin, Riccardo Casati, Mandanà Moshiri, Arne Röttger, Faraz Deirmina   +6 more
wiley   +1 more source

Path Planning for Rapid DEDAM Processing Subject to Interpass Temperature Constraints

Metals
Directed energy deposition (DED) additive manufacturing (AM) enables the production of components at a high deposition rate. For certain alloys, interpass temperature requirements are imposed to control heat accumulation and microstructure transformation,
Glenn W. Hatala, Edward W. Reutzel, Qian Wang   +2 more
doaj   +1 more source

Relationship between solidification time and porosity with directed energy deposition of Inconel 718

Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2018
Directed Energy Deposition (DED) of metal materials has been widely studied with Inconel 718 using in aerospace industry. Void generation in a deposited part causes deterioration of the mechanical strength.
Tatsuhiko KURIYA, Ryo KOIKE, Takanori MORI, Yasuhiro KAKINUMA   +3 more
doaj   +1 more source

Mems device with large out-of-plane actuation and low-resistance interconnect and methods of use [PDF]

, 2017
Source: United States Patent and Trademark Office, www.uspto.gov”The present application is directed to a MEMS device. The MEMS device includes a substrate having a first end and a second end extending along a longitudinal axis, the Substrate including ...
Beacken, Marc Jay, Bishop, David J., Chang, Jackson, Holyoak, Michael Jarret, Imboden, Matthias, Kannell, George Kenneth   +5 more
core  

Spatial and spatiotemporal variation in metapopulation structure affects population dynamics in a passively dispersing arthropod

, 2015
The spatial and temporal variation in the availability of suitable habitat within metapopulations determines colonization-extinction events, regulates local population sizes and eventually affects local population and metapopulation stability.
Bonte, Dries, De Roissart, Annelies, Wang, Shaopeng   +2 more
core   +3 more sources