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Additive manufacturing using plasma transferred arc
The International Journal of Advanced Manufacturing Technology, 2015Additive manufacturing is a process used to fabricate and repair parts that have a complex geometry or need to be functionally graded. The technique involves depositing multiple layers to produce the component. The success of the procedure depends on the deposition technique used, the parameters selected, and the alloy deposited.
E. A. Alberti +2 more
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Plasma Transferred Arc Deposition of Beryllium
International Thermal Spray Conference, 2006Abstract The exceptional properties of beryllium (Be) including low density and high elastic modulus, make it the material of choice in many defense and aerospace applications. However, health hazards associated with Be material handling limit the applications that are suited for its use. Innovative solutions that enable continued use of
K. Hollis +4 more
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Current transfer in dc non-transferred arc plasma torches
Journal of Physics D: Applied Physics, 2010Fundamentals of current transfer to the anodes in dc non-transferred arc plasma torches are investigated. Specially designed anodes made of three mutually isolated sections and external dc axial magnetic fields of various strengths are utilized to explore the conditions for different diffused and constricted attachments of the arc with the anode.
S Ghorui, S N Sahasrabudhe, A K Das
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Metal Transfer and Arc Plasma in Gas Metal Arc Welding
Journal of Heat Transfer, 2006This article analyzes the transient complex heat transfer and fluid flow in molten metal and arc plasma during the gas metal arc welding process. The model predicts the formation, growth, detachment, and transfer of droplets from the tip of a continuously fed electrode under the influences of several competing forces including gravity, electromagnetic ...
Hu, Junling, Tsai, Hai-Lung
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Plasma transferred arc hardfacing with 316L
2015The parts of machines and structures are often exposed to the action of aggressive corrosive environments, which in a short period of time can provoke the loss of their integrity. It is well known that for extending service life, the protection of exposed structure zone by coating is frequently used. One of the possible protection methods is hardfacing
Maslarević, Aleksandar +4 more
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Characterization of arc during hardfacing in plasma transfer arc welding
Canadian Metallurgical Quarterly, 2015In situ high temperature measurements of plasma transferred arc welding (PTAW) deposition of overlays are required in order to optimize the process. Infrared (IR) cameras have the capability for making these measurements. The reliability of the quantitative data is often in question due to changes in emissivity with temperature, surface condition and ...
T. B. Wolfe, H. Henein
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Some characteristics of transferred-Arc plasmas
Plasma Chemistry and Plasma Processing, 1989Although the theoretical foundations of the characteristics of transferred arcs were established more than three decades ago, the design of reator systems based on this method of plasma are generation is still in an early stage of development. Although deceptively simple in concept, attempts to use transferred arcs im practical applications at scales ...
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Numerical model of a transferred plasma arc
Journal of Applied Physics, 1998This article presents results of two-dimensional simulations for a transferred plasma arc. Calculations are performed for the internal plasma flow within the torch body, as well as the external plasma jet impinging on a surface. The governing equations describing the plasma flow are self-consistently coupled. These equations are the compressible Navier–
S. M. Aithal +3 more
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Journal of Manufacturing Processes, 2016
Abstract A novel welding process named Twin-body Plasma Arc Welding (TPAW) is proposed in this paper. The main arc in TPAW is established between tungsten electrode and guide electrode. In comparison with Non-transferred Plasma Arc Welding (NPAW) where one of the arc terminal is the nozzle, the workpieces are both not connected into the circuit loop,
Ruiying Zhang, Fan Jiang, Shujun Chen
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Abstract A novel welding process named Twin-body Plasma Arc Welding (TPAW) is proposed in this paper. The main arc in TPAW is established between tungsten electrode and guide electrode. In comparison with Non-transferred Plasma Arc Welding (NPAW) where one of the arc terminal is the nozzle, the workpieces are both not connected into the circuit loop,
Ruiying Zhang, Fan Jiang, Shujun Chen
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Plasma arc thermal destruction applications: technology transfer opportunities
International Journal of Technology Transfer and Commercialisation, 2002Plasma Arc Technology (PAT), an emerging environmental thermal treatment process, has been used to safely and efficiently meet the waste disposal needs of pyrotechnic smoke assemblies, thermal batteries, proximity fuses, contaminated soil and Asbestos Containing Material (ACM).
Ed Smith, Hany Zaghloul, Ravi K. Jain
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