Results 81 to 90 of about 332,343 (256)

Micromechanical Characterization of 316L‐V4E Steel Transitions Produced by Electron Beam Powder Bed Fusion with Dual‐Hopper Alternating Layer Strategy

Advanced Engineering Materials, EarlyView.
This work applies High‐Speed Nanoindentation to study multi‐material transitions in powder bed fusion–electron beam melting components. The aim is to assess the mechanical gradients and interfacial behavior between American iron and steel institute 316L stainless steel and V4E tool steel in additively manufactured structures.
Laia Ortiz‐Membrado, William Sjöström, Francesc Barberà Flichi, Carlos Botero, Anton S. Tremsin, Antonio Mateo, Emilio Jiménez‐Piqué   +6 more
wiley   +1 more source

Non-modal stability analysis and transient growth in a magnetized Vlasov plasma

, 2014
Collisionless plasmas, such as those encountered in tokamaks, exhibit a rich variety of instabilities. The physical origin, triggering mechanisms and fundamental understanding of many plasma instabilities, however, are still open problems. We investigate
Ratushnaya, Valeria, Samtaney, Ravi
core   +1 more source

X‐Ray Tomography Analysis of Damage Mechanisms in Metal Matrix Syntactic Foams During Compression

Advanced Engineering Materials, EarlyView.
In situ synchrotron X‐ray tomography is used to investigate the internal damage mechanisms of AlSi12 metal matrix syntactic foam with ceramic hollow spheres during compressive loading. It is concluded that a homogeneous distribution of the second‐phase filler material results in a sequential collapse in a localized region; this leads to controlled and ...
Indrajeet Tambe, János Endre Maróti, Imre Norbert Orbulov, Zoltan Hegedűs, Markus Ziehmer, Carl E. Krill III, Håkan Hallberg, Pär A. T. Olsson, Johan Hektor   +8 more
wiley   +1 more source

Radial symmetry, monotonicity and Liouville theorem for Marchaud fractional parabolic equations with the nonlocal Bellman operator

Advanced Nonlinear Studies
In this article, we focus on studying space-time fractional parabolic equations with the nonlocal Bellman operator and the Marchaud fractional derivative. To address the difficulty caused by the space-time non-locality of operator ∂tα−Fs ${\partial }_{t}^
Liu Mengru, Zhang Lihong, Wang Guotao
doaj   +1 more source

Rigorous bounds on irrelevant operators in the 3d Ising model CFT

Journal of High Energy Physics, 2022
We use the recently developed navigator method to obtain rigorous upper and lower bounds on new OPE data in the 3d Ising CFT. For example, assuming that there are only two ℤ2-even scalar operators ϵ and ϵ′ with a dimension below 6 we find a narrow ...
Marten Reehorst
doaj   +1 more source

Genetic algorithms with DNN-based trainable crossover as an example of partial specialization of general search

, 2018
Universal induction relies on some general search procedure that is doomed to be inefficient. One possibility to achieve both generality and efficiency is to specialize this procedure w.r.t. any given narrow task.
A Graves, A Potapov, A Potapov, B Goertzel, E Özkural, RJ Solomonoff, V Batishcheva, Y Futamura   +7 more
core   +1 more source

Experimental Analysis and Physics‐Based Analytical Model on Twisted and Coiled Artificial Muscles

Advanced Engineering Materials, EarlyView.
Twisted and coiled artificial muscles made from silver‐coated nylon fibers are investigated through experiments and analytical modeling. The actuators achieve contractions up to 19.3% and specific work of 8 kJ kg−1, though efficiency remains limited (≈0.15%) by thermal losses.
Salvatore Garofalo, Chiara Morano, Leonardo Pagnotta, Luigi Bruno   +3 more
wiley   +1 more source

The Rashba Hamiltonian and electron transport

, 2001
The Rashba Hamiltonian describes the splitting of the conduction band as a result of spin-orbit coupling in the presence of an external field and is commonly used to model the electronic structure of confined narrow-gap semiconductors.
A.C.H. Rowe, D. Grundler, E.I. Rashba, G. Kirczenow, Georg Schmidt, Gerrit E. W. Bauer, J. Nitta, Laurens W. Molenkamp, M.S. Ferreira, M.S. Ferreira, R. Fiederling, S. Datta, Y. Ohno, Yu. A. Bychkov   +13 more
core   +2 more sources

Wire‐Laser‐Directed Energy Deposition of Ti‐6Al‐4V Alloy Under Vacuum: Effect of Substrate Preheating on the Refinement of Prior‐β Grain Structure

Advanced Engineering Materials, EarlyView.
Microstructural evolution of Laser beam Direct Energy Deposition (DED‐LB)/Ti64, showing changes in microstructure after employing a preheated build platform, as evaluated by both optical microscopy and scanning electron microscopy/electron backscatter diffraction (SEM/EBSD), highlighting changes in grain morphology, the formation of equiaxed grains ...
Haneen Daoud, Agata Kulig, Kim Schmidt, Johannes Weiser, Maximilian Fichtl, Andrey Prihodovsky, Uwe Glatzel   +6 more
wiley   +1 more source

Microstructural Evolution and Mechanical Performance of Plasma‐Assisted Hybrid Friction Stir Welded Dissimilar Aluminum–Copper Joints

Advanced Engineering Materials, EarlyView.
Plasma‐assisted hybrid friction stir welding of dissimilar AlCu joints employs localized plasma preheating to balance heat input and enhance plastic flow. The optimized process reduces axial force by up to 35%, refines the microstructure, and achieves ≈96% joint efficiency.
Deepak Kumar Yaduwanshi, Pankaj Shrivastava, Ganesh Chouhan, Velaphi Msomi   +3 more
wiley   +1 more source