A5051968590- Welding Techniques and Residual Stresses
- Metal and Thin Film Mechanics
- Vacuum and Plasma Arcs
- Advanced Welding Techniques Analysis
- Advanced materials and composites
- Additive Manufacturing Materials and Processes
- High-Temperature Coating Behaviors
- Non-Destructive Testing Techniques
- Fluid Dynamics and Vibration Analysis
- Fluid Dynamics and Turbulent Flows
- Advanced Sensor Technologies Research
- Engineering and Environmental Studies
- Hydrogen embrittlement and corrosion behaviors in metals
- Engineering Applied Research
- Electrohydrodynamics and Fluid Dynamics
- Aerodynamics and Fluid Dynamics Research
- Plasma Diagnostics and Applications
- Wind and Air Flow Studies
- Advanced Machining and Optimization Techniques
- Metal Alloys Wear and Properties
- Aerosol Filtration and Electrostatic Precipitation
- Diamond and Carbon-based Materials Research
- Advancements in Materials Engineering
- Laser Material Processing Techniques
- Laser-induced spectroscopy and plasma
Osaka University
2016-2025
Shanghai Shipbuilding Technology Research Institute
2012-2025
Shanghai Jiao Tong University
2022
Kawasaki Heavy Industries (Japan)
2008-2020
Kobe Steel (Japan)
2007-2020
Kawasaki Hospital
2020
Commonwealth Scientific and Industrial Research Organisation
2010-2018
Universiti Malaysia Kelantan
2017
NTN (Japan)
2012
Tokyo Metropolitan University
2007-2011
The methods used to model thermal plasmas, including treatments of diffusion in arcs gas mixtures, are reviewed. influence thermophysical properties on the parameters tungsten–inert-gas (TIG) welding arcs, particularly those that affect weld pool, is investigated using a two-dimensional which arc, anode and cathode included self-consistently. effect changing each six characteristics an argon TIG arc assessed. product specific heat mass density found be important determining constriction. By...
A gas tungsten arc (GTA) was modelled taking into account the contamination of plasma by metal vapour from molten anode. The whole region GTA atmosphere including cathode, and anode treated using a unified numerical model. viscosity approximation used to express diffusion coefficient in terms shielding vapour. transient two-dimensional distributions temperature, velocity flow iron concentration were predicted, together with pool as function time for 150 current at atmospheric pressure, both...
Tungsten–inert-gas welding arcs are modelled using a two-dimensional axisymmetric computational code. Both electrodes (the tungsten cathode and the metal anode workpiece) arc plasma included self-consistently in domain. The influence of adding helium, hydrogen nitrogen to argon shielding gas is investigated. It found that addition any gases increases heat flow current density at anode. shear stress pressure surface increased by or up about 50 mol% but decrease when more helium added....
The influence of shielding gas composition on arc properties including temperature, voltage, heat flux and shear stress at the anode also weld depth as indicated by maximum temperature a water cooled is investigated. It found that additions helium, hydrogen nitrogen to argon all increase temperature. For this due lower electrical conductivity; in other cases, it higher specific heat.
How to obtain homogeneous element distribution is a challenging research in wire arc additive manufacturing (WAAM) of γ-TiAl alloys, and the transfer has great influence on it. A multi-physical numerical model considering dissimilar feeding melting, mixing developed, high-speed video camera adopted investigate behaviors WAAM alloy. The Ti Al elements can be transferred molten pool through liquid TiAl bridge. However, bridge not very stable, breakup between observed. wetting ability (wetting...
Plasma-Metal Inert Gas (MIG) hybrid welding was employed to carry out bead on plate of an aluminum alloy A5052. The plasma arc ignited form a keyhole, and series systems were developed starting with MIG welding. convective patterns within the weld pool meticulously analyzed. In addition, we conducted experimental observations flow inside surface pool, able visualize in some areas. results indicated that side formed seamlessly integrated side. At same time, observed formation integrates both...
Excessive spatter formation in conventional CO2 arc welding significantly diminishes quality and efficiency, posing a critical challenge for industrial applications. To address this issue, study investigated the mechanisms of metal transfer behavior under influence longitudinal magnetic field (LMF) using shadow-graph technique with high-speed imaging back-laser illumination, also coupled Computational Fluid Dynamics (CFD)-based arc-droplet numerical simulations. The results show that...
The effect of flux ratio on metal transfer behavior during metal-cored arc welding was elucidated through investigation using a standard solid wire and three wires with mass ratios (2-2) 10%, 15%, 20%. Investigation performed shadowgraph technique based images recorded high-speed camera equipped back-laser illumination. We observed that the droplet frequency increased both current ratio, being more dominant at low currents. surmise this is because sheath area decreases as increased. Hence,...
A gas tungsten arc in helium and argon was modelled taking into account the contamination of plasma by metal vapour from weld pool. The whole region atmosphere including cathode, pool treated using a unified numerical model. viscosity approximation used to express diffusion coefficient terms shielding vapour. transient two-dimensional distributions temperature, velocity flow iron concentration were predicted, together with penetration as function time for 150 current at atmospheric pressure,...
In order to clarify the fume formation mechanism in arc welding, a quantitative investigation based on knowledge of interaction among electrode, and weld pool is indispensable. A model consisting heterogeneous condensation model, homogeneous nucleation coagulation has been developed coupled with GTA or GMA welding model. series processes from evaporation metal vapour was totally investigated by employing this simulation The aim paper visualize process theoretically through numerical...