Minimization of bead geometry by optimization of regression equations for laser-beam bead-on-plate welded Hastelloy C-276 sheet

  • Kalinga Simant Bal
  • Jyotsna Dutta Majumdar
  • Asimava Roy ChoudhuryEmail author
Technical Paper


The present study is aimed at selection of laser beam welding parameters that would produce through-penetrated weld zone with minimum cross-sectional area in 2.7-mm-thick Hastelloy C-276 sheet. Weld zone area was found to be comprised of geometrical features such as total throat, crown width, root width, neck width. A new, fast and relatively simple method of optimization has been proposed in the present study. Regression equation for each geometrical feature was generated from the full factorial experimental design data. Optimization of welding parameters to minimize weld zone area was carried out by solving regression equations using experimentally obtained values of geometrical features as the boundary condition. Once the optimized value of parametric combination was obtained, experiment was conducted to confirm the minimization of weld bead cross-sectional geometry.


Hastelloy Fiber laser Full factorial experimental design Regression equation Laser beam welding Weld bead optimization 



The authors are grateful to all the faculty members, technical staffs and research scholars of Department of Mechanical Engineering, Department of Metallurgical and Materials Engineering and Central Research Facility, IIT Kharagpur, for extending their support to carry out various experiments. The authors want to thank Mr. Tanmoy Baram, Department of Mechanical Engineering, IIT Kharagpur, for his invaluable support.


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Copyright information

© The Brazilian Society of Mechanical Sciences and Engineering 2018

Authors and Affiliations

  • Kalinga Simant Bal
    • 1
  • Jyotsna Dutta Majumdar
    • 2
  • Asimava Roy Choudhury
    • 1
    Email author
  1. 1.Department of Mechanical EngineeringIndian Institute of TechnologyKharagpurIndia
  2. 2.Department of Metallurgical and Materials EngineeringIndian Institute of TechnologyKharagpurIndia

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