Results 31 to 40 of about 18,411 (193)

Achieving fully-equiaxed fine β-grains in titanium alloy produced by additive manufacturing

Materials Research Letters, 2023
The achievement of fine equiaxed β grain with conventional intragranular (α-Ti+β-Ti) microstructure in additive manufacturing titanium alloy remains a big challenge.
Aitang Xue, Xin Lin, Lilin Wang, Xufei Lu, Lukai Yuan, Hanlin Ding, Weidong Huang   +6 more
doaj   +1 more source

Working distance passive stability in laser directed energy deposition additive manufacturing

Materials & Design, 2019
In Laser Directed Energy Deposition (L-DED), closed loop control systems can be used to enhance system reliability; however, modulating controlled parameters can have unintended secondary morphological and microstructural effects.
James C. Haley, Baolong Zheng, Umberto Scipioni Bertoli, Alexander D. Dupuy, Julie M. Schoenung, Enrique J. Lavernia   +5 more
doaj   +1 more source

Utilisation of artificial neural networks to rationalise processing windows in directed energy deposition applications

Materials & Design, 2021
The application of Directed Energy Deposition (DED) when using new materials or new instruments, requires significant empirical testing to define a suitable or optimum process operation window.
D.R. Feenstra, A. Molotnikov, N. Birbilis   +2 more
doaj   +1 more source

Liquid Phase Transmission Electron Microscopy: A Window into the Early Stages of Complex Material Formation

Advanced Functional Materials, EarlyView.
Liquid‐phase transmission electron microscopy enables direct observation of nucleation and growth processes in solution. This review is dedicated to the remembrance of Helmut Cölfen and highlights recent studies on complex materials—oxides, biominerals, organic–inorganic crystals—which were central to his research activity. It summarizes key milestones,
Charles Sidhoum, Vinavadini Ramnarain, Nathaly Ortiz Peña, Dris Ihiawakrim, Clément Sanchez, Ovidiu Ersen   +5 more
wiley   +1 more source

Effect of Heat Treatment on the Microstructure and Hardness of Ni-Based Alloy 718 in a Variable Thickness Geometry Deposited by Powder Fed Directed Energy Deposition

Metals, 2022
Feature addition to existing parts is a trending application for Directed Energy Deposition (DED) and can be used to add complex geometry features to basic forged geometries with the aim to reduce and simplify the number of processing steps as machining ...
Pedro Ramiro, Haize Galarraga, Anabel Pérez-Checa, Mikel Ortiz, Amaia Alberdi, Trunal Bhujangrao, Elena Morales, Eneko Ukar   +7 more
doaj   +1 more source

From the Discovery of the Giant Magnetocaloric Effect to the Development of High‐Power‐Density Systems

Advanced Materials Technologies, EarlyView.
The article overviews past and current efforts on caloric materials and systems, highlighting the contributions of Ames National Laboratory to the field. Solid‐state caloric heat pumping is an innovative method that can be implemented in a wide range of cooling and heating applications.
Agata Czernuszewicz, Yaroslav Mudryk, Jun Cui, Lucas Griffith, Duane D. Johnson, Julie Slaughter   +5 more
wiley   +1 more source

Experimental Characterization of AISI P21 Tool Steel/Hexagonal Boron Nitride Composites Via Directed Energy Deposition [PDF]

Archives of Metallurgy and Materials, 2016
Directed energy deposition (DED) is a metal additive manufacturing (AM) process where material is deposited layer by layer using a focused energy source.
Pil-Ho Lee, Min-Kyo Jung, Joon Phil Choi, Yongrae Kim, Taeho Ha   +4 more
doaj   +1 more source

Buried Unstrained Germanium Channels: A Lattice‐Matched Platform for Quantum Technology

Advanced Science, EarlyView.
ABSTRACT Strained germanium (ε$\varepsilon$‐Ge) and strained silicon (ε$\varepsilon$‐Si) buried quantum wells have enabled advanced spin‐qubit quantum processors. However, in the absence of suitable lattice‐matched substrates, ε$\varepsilon$‐Ge and ε$\varepsilon$‐Si are deposited on defective, metamorphic SiGe buffers, which may impact device ...
Davide Costa, Patrick Del Vecchio, Karina Hudson, Lucas E. A. Stehouwer, Alberto Tosato, Davide Degli Esposti, Vladimir Calvi, Luca Moreschini, Mario Lodari, Stefano Bosco, Giordano Scappucci   +10 more
wiley   +1 more source

Directed Energy Deposition of Metal Alloys

Metals
Directed energy deposition (DED) stands as an advancement in material utilization, facilitating the production of highly precise near-net shape components using wire and powders [...]
Joel Andersson
doaj   +1 more source

Self‐Activating Electrocatalysts for Water Splitting: Advancing Structure–Performance Understanding and Beyond

Advanced Energy Materials, EarlyView.
Self‐activating electrocatalysts offer strong potential for advanced water splitting, enabled by their dynamic compositional and structural evolution during operation. This review highlights recent advances in self‐activating OER and HER catalysts, emphasizing the driving forces and mechanisms underlying their adaptive behavior. A conceptual network of
Christean Nickel, Bahareh Feizi Mohazzab, Kiarash Torabi, David Leander Troglauer, Guillermo Corea, Shikang Han, Dandan Gao   +6 more
wiley   +1 more source