Modeling and Optimization of Nd:YAG Laser-TIG Hybrid Welding of Stainless Steel

Mahmoud Moradi, Majid Ghoreishi, Mohammad Javad Torkamany

Research output: Contribution to journalArticlepeer-review

62 Downloads (Pure)


In the present study the Nd:YAG laser-tungsten inert gas (TIG) hybrid butt joint welding parameters of stainless steel 1.4418 have been investigated by coupling a pulsed Nd:YAG laser with a continuous wave (CW) TIG source. The experiments were performed based on the response surface methodology (RSM) as a statistical design of experiments approach to investigate the effect of parameters on the response variations, and achieve the mathematical equations to predict the new results. Welding speed (1 to 5 mm/s), TIG current (90 to 130 A) and distance of heat sources (1 to 5 mm) were assumed as the input process variables while the weld surface width, weld seam area, and weld penetration were considered as the process responses. Analysed by statistical techniques, the results indicated that the welding speed is the most important parameter among all parameters with a reverse effect on process outputs. Besides, TIG current has a direct influence on all investigated responses. The paper invokes the desirability approach optimization technique to achieve the best geometrical dimensions of weld profiles and validating the theoretical results using the experimental tests. Once the optimum settings are considered, a tensile test was also conducted.
Original languageEnglish
Pages (from-to)211-230
Number of pages20
JournalLasers in Engineering
Issue number3-4
Publication statusPublished - Jan 2014
Externally publishedYes

Bibliographical note

Copyright © and Moral Rights are retained by the author(s) and/ or other copyright owners. A copy can be downloaded for personal non-commercial research or study, without prior permission or charge. This item cannot be reproduced or quoted extensively from without first obtaining permission in writing from the copyright holder(s). The content must not be changed in any way or sold commercially in any format or medium without the formal permission of the copyright holders.


  • Laser-TIG hybrid welding
  • Design of Experiments
  • Response Surface Methodology
  • weld bead profile


Dive into the research topics of 'Modeling and Optimization of Nd:YAG Laser-TIG Hybrid Welding of Stainless Steel'. Together they form a unique fingerprint.

Cite this