The Experts below are selected from a list of 6885 Experts worldwide ranked by ideXlab platform
Woohyun Song - One of the best experts on this subject based on the ideXlab platform.
-
molten pool behavior in the tandem Submerged Arc Welding process
Journal of Materials Processing Technology, 2014Co-Authors: Daewon Cho, Degala Venkata Kiran, Woohyun Song, Suck-joo NaAbstract:Abstract A three-dimensional numerical heat transfer and fluid flow model is developed to examine the temperature profiles, velocity fields, weld pool shape and size in a two-wire tandem Submerged Arc Welding process. The model solves the equations of the conservation of mass, momentum, and energy along with the volume of fluid method. The volume of fluid method is used to track the shape of the free surface. Further, a novel scheme is proposed to handle the Arc interaction and its influence on the molten droplet transfer direction. Using the computational fluid dynamics simulations, it is found that the droplet movement and Arc forces from the leading electrode heavily affect the molten pool flow patterns and the resultant bead shapes, even though the same heat inputs are applied. The computed weld width and penetration are in fair agreement with the corresponding experimental results.
-
Arc behavior in two wire tandem Submerged Arc Welding
Journal of Materials Processing Technology, 2014Co-Authors: Degala Venkata Kiran, Daewon Cho, Woohyun SongAbstract:Abstract The behavior of leading and trailing Arc root dimensions and Arc interaction in the two-wire tandem Submerged Arc Welding process was studied using real-time recorded current and voltage waveforms, and CCD Arc images for a wide range of experimental conditions. Physical and regression equations were developed to predict the Arc interaction and dimensions as a function of the Welding condition. The influence of the Arc interaction on the molten droplet transfer direction was studied. The Arc center displacements (Arc interaction) under different Welding conditions were fairly well predicted by the corresponding physical models. The Arc root dimensions were unsymmetrical and increased with an increase in the Welding current and voltage while the same decreased with the increase in the Arc center displacements. This variation was reasonably envisaged by the developed regression models. The detached molten electrode droplet followed the Arc axis at the time of detachment and deposited into the weld pool.
Daewon Cho - One of the best experts on this subject based on the ideXlab platform.
-
molten pool behavior in the tandem Submerged Arc Welding process
Journal of Materials Processing Technology, 2014Co-Authors: Daewon Cho, Degala Venkata Kiran, Woohyun Song, Suck-joo NaAbstract:Abstract A three-dimensional numerical heat transfer and fluid flow model is developed to examine the temperature profiles, velocity fields, weld pool shape and size in a two-wire tandem Submerged Arc Welding process. The model solves the equations of the conservation of mass, momentum, and energy along with the volume of fluid method. The volume of fluid method is used to track the shape of the free surface. Further, a novel scheme is proposed to handle the Arc interaction and its influence on the molten droplet transfer direction. Using the computational fluid dynamics simulations, it is found that the droplet movement and Arc forces from the leading electrode heavily affect the molten pool flow patterns and the resultant bead shapes, even though the same heat inputs are applied. The computed weld width and penetration are in fair agreement with the corresponding experimental results.
-
Arc behavior in two wire tandem Submerged Arc Welding
Journal of Materials Processing Technology, 2014Co-Authors: Degala Venkata Kiran, Daewon Cho, Woohyun SongAbstract:Abstract The behavior of leading and trailing Arc root dimensions and Arc interaction in the two-wire tandem Submerged Arc Welding process was studied using real-time recorded current and voltage waveforms, and CCD Arc images for a wide range of experimental conditions. Physical and regression equations were developed to predict the Arc interaction and dimensions as a function of the Welding condition. The influence of the Arc interaction on the molten droplet transfer direction was studied. The Arc center displacements (Arc interaction) under different Welding conditions were fairly well predicted by the corresponding physical models. The Arc root dimensions were unsymmetrical and increased with an increase in the Welding current and voltage while the same decreased with the increase in the Arc center displacements. This variation was reasonably envisaged by the developed regression models. The detached molten electrode droplet followed the Arc axis at the time of detachment and deposited into the weld pool.
Degala Venkata Kiran - One of the best experts on this subject based on the ideXlab platform.
-
Analysis of molten pool behavior by flux-wall guided metal transfer in low-current Submerged Arc Welding process
International Journal of Heat and Mass Transfer, 2017Co-Authors: Degala Venkata Kiran, Suck-joo NaAbstract:Abstract A three-dimensional numerical heat transfer and fluid flow model is developed to understand the temperature distribution and molten pool behavior in a low-current Submerged Arc Welding process. The model solves the equations of the conservation of mass, momentum, and energy along with the volume of fluid method. The volume of fluid method is used to track the shape of the free surface. Further, this paper suggests a flux wall boundary model to simulate flux-wall guided transfer for a single-wire low-current Submerged-Arc Welding process. This study simulates how porosity can be trapped in the V-groove joint with a flux-wall guided transfer. The computed weld width and fusion-zone shape are in fair agreement with the corresponding experimental results.
-
molten pool behavior in the tandem Submerged Arc Welding process
Journal of Materials Processing Technology, 2014Co-Authors: Daewon Cho, Degala Venkata Kiran, Woohyun Song, Suck-joo NaAbstract:Abstract A three-dimensional numerical heat transfer and fluid flow model is developed to examine the temperature profiles, velocity fields, weld pool shape and size in a two-wire tandem Submerged Arc Welding process. The model solves the equations of the conservation of mass, momentum, and energy along with the volume of fluid method. The volume of fluid method is used to track the shape of the free surface. Further, a novel scheme is proposed to handle the Arc interaction and its influence on the molten droplet transfer direction. Using the computational fluid dynamics simulations, it is found that the droplet movement and Arc forces from the leading electrode heavily affect the molten pool flow patterns and the resultant bead shapes, even though the same heat inputs are applied. The computed weld width and penetration are in fair agreement with the corresponding experimental results.
-
Arc behavior in two wire tandem Submerged Arc Welding
Journal of Materials Processing Technology, 2014Co-Authors: Degala Venkata Kiran, Daewon Cho, Woohyun SongAbstract:Abstract The behavior of leading and trailing Arc root dimensions and Arc interaction in the two-wire tandem Submerged Arc Welding process was studied using real-time recorded current and voltage waveforms, and CCD Arc images for a wide range of experimental conditions. Physical and regression equations were developed to predict the Arc interaction and dimensions as a function of the Welding condition. The influence of the Arc interaction on the molten droplet transfer direction was studied. The Arc center displacements (Arc interaction) under different Welding conditions were fairly well predicted by the corresponding physical models. The Arc root dimensions were unsymmetrical and increased with an increase in the Welding current and voltage while the same decreased with the increase in the Arc center displacements. This variation was reasonably envisaged by the developed regression models. The detached molten electrode droplet followed the Arc axis at the time of detachment and deposited into the weld pool.
Suck-joo Na - One of the best experts on this subject based on the ideXlab platform.
-
Analysis of molten pool behavior by flux-wall guided metal transfer in low-current Submerged Arc Welding process
International Journal of Heat and Mass Transfer, 2017Co-Authors: Degala Venkata Kiran, Suck-joo NaAbstract:Abstract A three-dimensional numerical heat transfer and fluid flow model is developed to understand the temperature distribution and molten pool behavior in a low-current Submerged Arc Welding process. The model solves the equations of the conservation of mass, momentum, and energy along with the volume of fluid method. The volume of fluid method is used to track the shape of the free surface. Further, this paper suggests a flux wall boundary model to simulate flux-wall guided transfer for a single-wire low-current Submerged-Arc Welding process. This study simulates how porosity can be trapped in the V-groove joint with a flux-wall guided transfer. The computed weld width and fusion-zone shape are in fair agreement with the corresponding experimental results.
-
molten pool behavior in the tandem Submerged Arc Welding process
Journal of Materials Processing Technology, 2014Co-Authors: Daewon Cho, Degala Venkata Kiran, Woohyun Song, Suck-joo NaAbstract:Abstract A three-dimensional numerical heat transfer and fluid flow model is developed to examine the temperature profiles, velocity fields, weld pool shape and size in a two-wire tandem Submerged Arc Welding process. The model solves the equations of the conservation of mass, momentum, and energy along with the volume of fluid method. The volume of fluid method is used to track the shape of the free surface. Further, a novel scheme is proposed to handle the Arc interaction and its influence on the molten droplet transfer direction. Using the computational fluid dynamics simulations, it is found that the droplet movement and Arc forces from the leading electrode heavily affect the molten pool flow patterns and the resultant bead shapes, even though the same heat inputs are applied. The computed weld width and penetration are in fair agreement with the corresponding experimental results.
M Suban - One of the best experts on this subject based on the ideXlab platform.
-
high productivity multiple wire Submerged Arc Welding and cladding with metal powder addition
Journal of Materials Processing Technology, 2003Co-Authors: J Tusek, M SubanAbstract:Abstract The paper deals with multiple-wire Submerged-Arc Welding and cladding with metal-powder addition. Three different ways of supplying the metal powder to the Welding area are described and shown schematically. It was found that the use of metal powder will increase the deposition rate, and the Welding-Arc efficiency and reduce the shielding-flux consumption. A suitable device permits Submerged-Arc Welding and cladding with metal-powder addition. The process is primarily meant for the cladding of worn surfaces or the production of surfaces with certain characteristics (corrosion or wear resistance). By using the metal-powder addition it is possible to alloy a weld or a cladding with optional chemical elements.
