Proactive Control Effect of Arc and Weld Pool Behaviors by an External Magnetic Field in High Speed GMAW

2016 ◽  
Vol 52 (2) ◽  
pp. 1 ◽  
Author(s):  
Lin WANG
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Weld Pool ◽  
High Speed ◽  
Proactive Control ◽  
Control Effect

scholarly journals Investigation of the Arc Characteristics of Switching DC Arcs on Hydrogen Containing Gas Mixtures

2019 ◽  
Vol 6 (1) ◽  
pp. 69-72 ◽  
Author(s):  
D. Gonzalez ◽  
S. Gortschakow ◽  
S. Yu ◽  
F. Werner
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
High Speed ◽  
Gas Mixtures ◽  
High Speed Imaging ◽  
Arc Characteristics ◽  
Pressure Discharge ◽  
Model Chamber ◽  
Imaging And Spectroscopy ◽  
Dc Current

<p>The characteristics of switching DC current arcs in  hydrogen  containing gas mixtures under pressure were investigated using a model chamber. The switching device consists of an electro-mechanic double breaker unit with copper contacts. High-speed imaging and spectroscopy were used to observe and to characterize the switching arc. The experiments indicate how the dynamic interaction of an external magnetic field with a high-pressure discharge causes an elongation and twisting of the arc-channel and consequently a voltage increase. Comparative measurements with and without external magnetic field indicate a strong influence of this factor. Cu and N lines together with strongly broadened H lines were observed.</p>

scholarly journals Effect of External Magnetic Field on Long DC Arc Characteristics with Rng-shaped Anode

2021 ◽  
Vol 333 ◽  
pp. 03004
Author(s):  
Akio Hashizawa ◽  
Manabu Tanaka ◽  
Takayuki Watanabe ◽  
Tomohiro Koga
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
High Speed ◽  
Plasma Jet ◽  
Jet Flow ◽  
Critical Issue ◽  
Fluctuation Phenomena ◽  
High Speed Camera ◽  
Electrode Gap ◽  
Dc Arc

Fluctuation phenomena of plasma jet flow in an innovative long DC arc system with a ring-shaped anode were successfully clarified by a high-speed camera visualization. The long DC arc with long electrode gap distance more than 350 mm has been applied to gas decomposition due to its advantages of long plasma length, resulting in long residence time of treated gas. However, large heat loss at a conventional hemispherical-shaped anode was a critical issue in the long DC arc system. Therefore, the ring-shaped anode was utilized to convert large energy loss at the anode into the plasma jet flow. High-speed camera observation revealed the effect of external magnetic field on the fluctuation phenomena. Plasma jet fluctuates with the frequency of several tens Hz when the magnetic field was applied. These understanding of arc and plasma jet fluctuation enables to improve the capability of long DC arc system.

Vibration Characteristics of Magnetic Fluid Droplet Adsorbed to Magnetized Needlepoint in Alternating Magnetic Field

2012 ◽  
Vol 721 ◽  
pp. 108-113
Author(s):  
Sota Inomata ◽  
Seiichi Sudo ◽  
Hidemasa Takana ◽  
Hideya Nishiyama
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Magnetic Fluid ◽  
High Speed ◽  
Video Camera ◽  
Alternating Magnetic Field ◽  
Camera System ◽  
High Speed Video ◽  
High Speed Video Camera ◽  
Video Camera System

The dynamic behavior of a magnetic fluid droplet adsorbed to magnetized needlepoint in alternating magnetic field was studied with a high speed video camera system. The directions of alternating magnetic field were parallel and opposite to static magnetic field of magnetized needlepoint. It was found that the surface of magnetic fluid droplet responds to the external magnetic field in elongation and contraction. The frequency of magnetic fluid droplet oscillation was exactly same of the external magnetic field. The shape and instability oscillations of the magnetic fluid droplet were revealed experimentally.

The Influence of an External Magnetic Field on the Burning of a High-Speed Air-Carbon Mixture

2018 ◽  
Vol 56 (1) ◽  
pp. 20-24 ◽  
Author(s):  
A. I. Alekseev ◽  
D. N. Vaulin ◽  
A. I. Stepanov ◽  
V. A. Chernikov
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
High Speed

scholarly journals Dependency of high-speed write properties on external magnetic field in spin–orbit torque in-plane magnetoresistance devices

2021 ◽  
Vol 14 (1) ◽  
pp. 013001
Author(s):  
Yohei Shiokawa ◽  
Eiji Komura ◽  
Yugo Ishitani ◽  
Atsushi Tsumita ◽  
Keita Suda ◽  
...  
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
High Speed ◽  
Spin Orbit

Alternating Magnetic Field Responses of Magnetic Fluid Drop Adsorbed to a Small Permanent Magnet

2012 ◽  
Vol 721 ◽  
pp. 102-107 ◽  
Author(s):  
Seiichi Sudo ◽  
Daisaku Asano ◽  
Hidemasa Takana ◽  
Hideya Nishiyama
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Permanent Magnet ◽  
Magnetic Fluid ◽  
High Speed ◽  
Experimental Studies ◽  
Video Camera ◽  
Alternating Magnetic Field ◽  
Camera System ◽  
Fluid Drop

Experimental studies of the behavior of magnetic fluid drop under the effect of an external alternating magnetic field were performed using a high speed digital video camera system. A small permanent magnet was immersed in magnetic fluid drop, and it was fixed with an aluminum bar. The surface of magnetic fluid responded to the external magnetic field sensitively. The free surface of the magnetic fluid drop responded to the external alternating field in elongation and contraction along the direction of the field. The capillary magnetic fluid jet was produced at the certain external magnetic field condition.

scholarly journals Bistable memory effect in chromium oxide junctions

2002 ◽  
Vol 746 ◽  
Author(s):  
A. Sokolov ◽  
C.-S. Yang ◽  
E. Ovtchenkov ◽  
L. Yuan ◽  
S.-H. Liou ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Electrical Properties ◽  
External Magnetic Field ◽  
High Speed ◽  
Excitation Pulse ◽  
Zero Field ◽  
Zero Bias ◽  
In Series ◽  
Iv Curves ◽  
Zero Bias Anomaly

ABSTRACTMagnetotransport properties of granular CrO2 /Cr2O3 films made of CrO2 crystals covered by 1– 2 nm native insulating Cr2O3 are presented. Electrical properties of a limited number of grains measured in series and parallel (10 to 15 grains) reveal intergrain tunneling characteristics. At lowest temperatures, a well pronounced zero bias anomaly indicates that impurities in the junctions block the electronic flow.Hysteresis in the IV curves are observed at intermediate temperatures on zero-field cooled samples. Changing the polarity of a short excitation pulse (100ns) of amplitude smaller than 1 V triggers a change in the zero-bias resistance by 10–50%. These states are stable and well reproducible in the temperature interval ranging from 100K to 250K. Applying an external magnetic field cancels the IV hysteresis. The resistance of the devices in the kΩ range, the potential high-speed for writing and reading the resistance sate, make these systems interesting candidates for magnetic non-volatile memories.

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