The Experts below are selected from a list of 8778 Experts worldwide ranked by ideXlab platform

Xiaoyan Zeng - One of the best experts on this subject based on the ideXlab platform.

  • study on microstructure and mechanical properties of 304 stainless steel joints by tig laser and laser tig hybrid welding
    Optics and Lasers in Engineering, 2010
    Co-Authors: Jun Yan, Ming Gao, Xiaoyan Zeng
    Abstract:

    Abstract This paper investigated the microstructure and mechanical properties of 304 stainless steel joints by tungsten inert gas (TIG) welding, laser welding and laser-TIG hybrid welding. The X-ray diffraction was used to analyze the phase composition, while the microscopy was conducted to study the microstructure characters of joints. Finally, tensile tests were performed and the fracture surfaces were analyzed. The results showed that the joint by laser welding had highest tensile strength and smallest dendrite size in all joints, while the joint by TIG welding had lowest tensile strength, biggest dendrite size. Furthermore, transition zone and heat affected zone can be observed in the joint of TIG welding. The fractograph observation showed that the TIG welding joint existed as cup–cone shaped fracture, while the laser welding and hybrid welding joints existed as pure-shear fracture. The laser welding and hybrid welding are suitable for welding 304 stainless steel owing to their high welding speed and excellent mechanical properties.

Yangjun Zhang - One of the best experts on this subject based on the ideXlab platform.

  • A study of 16MnDR steel thick plate narrow gap laser-MIG hybrid welding
    Zhongguo Jiguang Chinese Journal of Lasers, 2016
    Co-Authors: Xiaofeng Zhang, XIAO-GUANG HU, G. Mi, Sheng Li, Xiaodong Wang, Yangjun Zhang
    Abstract:

    ? 2016, Chinese Laser Press. All right reserved.In order to realize the narrow-gap welding of 20 mm thick plate 16MnDR steel, experiments are designed to study the effect of root faces and groove angles on welding process stability, weld appearances and welding efficiency, then optimize the size of the groove, on this basis, using autogenous laser as bottom welding, multi-pass multi-layer laser-MIG hybrid welding to fill the gap. The results indicate that the weld appearance is pretty good and there is no defects of internal weld. Comparing the welding heat input and welding efficiency of laser-MIG hybrid welding with traditional arc welding, the welding heat input of laser-MIG hybrid welding decreases by 45%, and the welding efficiency of laser-MIG hybrid welding increases by 155%. The tensile strength of the joint is slightly higher than that of the base metal, satisfying the strength requirement, and there is no crack while the joints are bent to 180?, meeting the yield strength.

Jun Yan - One of the best experts on this subject based on the ideXlab platform.

  • study on microstructure and mechanical properties of 304 stainless steel joints by tig laser and laser tig hybrid welding
    Optics and Lasers in Engineering, 2010
    Co-Authors: Jun Yan, Ming Gao, Xiaoyan Zeng
    Abstract:

    Abstract This paper investigated the microstructure and mechanical properties of 304 stainless steel joints by tungsten inert gas (TIG) welding, laser welding and laser-TIG hybrid welding. The X-ray diffraction was used to analyze the phase composition, while the microscopy was conducted to study the microstructure characters of joints. Finally, tensile tests were performed and the fracture surfaces were analyzed. The results showed that the joint by laser welding had highest tensile strength and smallest dendrite size in all joints, while the joint by TIG welding had lowest tensile strength, biggest dendrite size. Furthermore, transition zone and heat affected zone can be observed in the joint of TIG welding. The fractograph observation showed that the TIG welding joint existed as cup–cone shaped fracture, while the laser welding and hybrid welding joints existed as pure-shear fracture. The laser welding and hybrid welding are suitable for welding 304 stainless steel owing to their high welding speed and excellent mechanical properties.

Xiaofeng Zhang - One of the best experts on this subject based on the ideXlab platform.

  • A study of 16MnDR steel thick plate narrow gap laser-MIG hybrid welding
    Zhongguo Jiguang Chinese Journal of Lasers, 2016
    Co-Authors: Xiaofeng Zhang, XIAO-GUANG HU, G. Mi, Sheng Li, Xiaodong Wang, Yangjun Zhang
    Abstract:

    ? 2016, Chinese Laser Press. All right reserved.In order to realize the narrow-gap welding of 20 mm thick plate 16MnDR steel, experiments are designed to study the effect of root faces and groove angles on welding process stability, weld appearances and welding efficiency, then optimize the size of the groove, on this basis, using autogenous laser as bottom welding, multi-pass multi-layer laser-MIG hybrid welding to fill the gap. The results indicate that the weld appearance is pretty good and there is no defects of internal weld. Comparing the welding heat input and welding efficiency of laser-MIG hybrid welding with traditional arc welding, the welding heat input of laser-MIG hybrid welding decreases by 45%, and the welding efficiency of laser-MIG hybrid welding increases by 155%. The tensile strength of the joint is slightly higher than that of the base metal, satisfying the strength requirement, and there is no crack while the joints are bent to 180?, meeting the yield strength.

Suck-joo Na - One of the best experts on this subject based on the ideXlab platform.

  • Modeling and simulation of arc: Laser and hybrid welding process
    Journal of Manufacturing Processes, 2014
    Co-Authors: Dae Won Cho, Won Ik Cho, Suck-joo Na
    Abstract:

    Welding is a fabrication process to join two different materials. Among the many welding processes, the arc and laser welding processes are the most widely used. Great effort is required to understand the physical phenomena of arc and laser welding due to the complex behaviors which include liquid phase, solid phase and, gas phase. So it is necessary to conduct numerical simulation to understand the detailed procedures of welding. This paper will present the various numerical simulation methods of the arc welding processes such as arc plasma, gas tungsten arc welding, gas metal arc welding, laser welding, and laser-arc hybrid welding. These simulations are conducted by the finite element method, finite differential method and volume of fluid method to describe and analyze the various welding processes. © 2013 The Society of Manufacturing Engineers.

  • modeling and simulation of arc laser and hybrid welding process
    Journal of Manufacturing Processes, 2014
    Co-Authors: Suck-joo Na
    Abstract:

    Abstract Welding is a fabrication process to join two different materials. Among the many welding processes, the arc and laser welding processes are the most widely used. Great effort is required to understand the physical phenomena of arc and laser welding due to the complex behaviors which include liquid phase, solid phase and, gas phase. So it is necessary to conduct numerical simulation to understand the detailed procedures of welding. This paper will present the various numerical simulation methods of the arc welding processes such as arc plasma, gas tungsten arc welding, gas metal arc welding, laser welding, and laser–arc hybrid welding. These simulations are conducted by the finite element method, finite differential method and volume of fluid method to describe and analyze the various welding processes.