Results 51 to 60 of about 42,380 (312)

Experimental studies of influence of DC and AC electric fields on bridging in contaminated transformer oil

, 2015
Analysis of real operating condition revealed that HVDC transformers experience combined effect of DC biased AC electric field. The dynamics of pressboard particle in contaminated transformer oil under the influence of DC, AC and DC biased AC electric ...
Mahmud, S., Golosnoy, I.O., Chen, G., Wilson, G., Jarman, P.   +4 more
core   +1 more source

Slip Localization Intensification Mediated by Grain Boundary Sliding in a Polycrystalline Nickel‐Based Superalloy

Advanced Engineering Materials, EarlyView.
The temperature dependence of fatigue behavior in nickel‐based superalloys is investigated through high‐resolution measurements of plastic localization. While increasing temperature reduces localization and enhances fatigue performance in René 88DT, Inconel 718 exhibits a sharp degradation at intermediate temperature due to intensified slip ...
M. Calvat, D. Anjaria, I. Woo, C. Bean, D. Texier, J. C. Stinville   +5 more
wiley   +1 more source

Investigation on different materials after pulsed high field conditioning and low-energy H- irradiation

Frontiers in Physics
During operation, the radio-frequency quadrupole (RFQ) of the LINAC4 at CERN is exposed to high electric fields, which can lead to vacuum breakdown. It is also subject to beam loss, which can cause surface modification, including blistering, which can ...
C. Serafim, C. Serafim, R. Peacock, S. Calatroni, F. Djurabekova, A. T. Perez Fontenla, W. Wuensch, S. Sgobba, A. Grudiev, A. Lombardi, E. Sargsyan, S. Ramberger, G. Bellodi   +12 more
doaj   +1 more source

Electric characteristics of pseudo-spark during breakdown phase

, 1993
An analysis of the time-dependent resistive voltage and power deposition during the breakdown phase of pseudo-spark is presented. The voltage and current were measured by specially designed low-inductance capacitive voltage divider and current measuring ...
林斌, Chow Q, LIN, B (reprint author), CHINESE ACAD SCI,INST MECH,BEIJING 100080,PEOPLES R CHINA.   +2 more
core   +1 more source

Tailoring Functional Properties of Ti–Ni–Cu Shape Memory Alloy Thin Films for MEMS Actuators

Advanced Engineering Materials, EarlyView.
A comprehensive study of critical parameters required to develop well‐performing Ti–Ni–Cu thin film shape memory alloy microactuators is provided. Materials science and device integration aspects are integrated by addressing structural and physical relationships using complementary characterization techniques as well as a practical fabrication solution
Elaheh Akbarnejad, Aleksander Kostka, Gowtham Arivanandhan, Yujiao Li, Alan Savan, Manfred Kohl, Alfred Ludwig   +6 more
wiley   +1 more source

Creep‐Induced Microstructural Evolution in an A2‐B2 Superalloy

Advanced Engineering Materials, EarlyView.
A 27.3Ta‐27.3Mo‐27.3Ti‐8Cr‐10Al (at.%) refractory high‐entropy alloy with precipitation‐strengthened A2‐B2 microstructure was studied by creep tests at 1030°C, which demonstrate a transition in deformation mechanisms in the range of 100–150 MPa applied stress. This is associated with changes in dislocation–precipitate interactions. Relevant deformation
Liu Yang, Aparajita Pramanik, Sandipan Sen, Shubhashis Dixit, Marcel Muench, R. J. Vikram, Daniel Schliephake, Yolita M. Eggeler, Ankur Chauhan, Martin Heilmaier, Alexander Kauffmann   +10 more
wiley   +1 more source

Imaging of Electric-Field-Free Gas Breakdown

, 2011
Images of electric-field-free gas breakdown are presented. Possible mechanism of the breakdown is proposed.
Shkuratov, S. I., Larry L. Altgilbers, Sergey I. Shkuratov, Evgueni F. Talantsev, Baird, Jason, Talantsev, E. F., Altgilbers, Larry L., Jason Baird   +7 more
core   +1 more source

Creep Properties and Deformation Mechanism of Additively Manufactured NiAl‐CrMo Composites

Advanced Engineering Materials, EarlyView.
Additively manufactured NiAl‐CrMo composites contain numerous interfaces and cell boundaries that control their creep response. At 700°C under high applied stress, creep is dominated by dislocation‐controlled power‐law mechanisms. At 800°C–900°C and lower stresses, creep is primarily diffusion‐controlled along cell boundaries.
Jan Vollhüter, Andreas Bezold, Johan Westraadt, Katharina Fiegl, Subham Chattoraj, Benjamin Wahlmann, Carolin Körner, Michael Mills, Mathias Göken, Steffen Neumeier   +9 more
wiley   +1 more source

SIMULATION OF PULSED BREAKDOWN IN HELIUM BY ADAPTIVE METHODS [PDF]

Научно-технический вестник информационных технологий, механики и оптики, 2014
The paper deals with the processes occurring during electrical breakdown in gases as well as numerical simulation of these processes using adaptive mesh refinement methods. Discharge between needle electrodes in helium at atmospheric pressure is selected
S. I. Eliseev, V. I. Demidov, A. S. Chirtsov, A. A. Kudryavtsev, V. I. Kolobov, E. A. Bogdanov   +5 more
doaj  

Low-pressure gas breakdown in longitudinal combined electric fields [PDF]

, 2010
This paper contains the complete experimental and analytical picture of gas breakdown in combined electric fields for arbitrary values of rf and dc fields. To obtain it, we continued the study of the discharge ignition modes in nitrogen with simultaneous
N D Kharchenko, V D Yegorenkov, Yegorenkov, V., V A Lisovskiy, Lisovskiy, V., Kharchenko, N.   +5 more
core   +1 more source