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This work presents an analysis and multi-criteria selection by hybrid operation combined of analytic hierarchy process (AHP) and Taguchi design for the selection of optimal welding parameters to produce shielded metal arc welding (SMAW) of Cr-Mo P11 low alloy steel used in power plant. In our investigation, three welding parameters i.e. intensity (I (A)), voltage (V (v)) and welding speed (S (mm/min)) have been tested to evaluate four output mechanical properties i.e. penetration depth and maximum strain (ε (%)), tensile strength (σ (MPa)) and impact energy (IE (MPa)). Taguchi L9 orthogonal array is employed to extract mathematical models and welding parameters effects on output properties. It was deduced that welding current has a significant influence on tensile strength, strain and penetration depth properties followed by welding speed and voltage. This study delves into the investigation of sub-criteria of welding process through the use of AHP method coordinately with Taguchi results to identify the optimal filler rod (Ri). Taguchi's biggest effect parameter is included in the AHP matrix to choose the best welding rod by adopting different welding parameters with preheating temperature (T °C).

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Analysis and Selection of SMAW Welding Process Parameters of Cr-Mo P11 Steel for Power Plant Applications

  • 会议论文

  • 发表日期：

    2025年

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  • Mohamed Farid Benlamnouar,
  • Nabil Bensaid,
  • Tahar Saadi,
  • Yazid Laib Dit Laksir,
  • Riad Badji

摘要

This work presents an analysis and multi-criteria selection by hybrid operation combined of analytic hierarchy process (AHP) and Taguchi design for the selection of optimal welding parameters to produce shielded metal arc welding (SMAW) of Cr-Mo P11 low alloy steel used in power plant. In our investigation, three welding parameters i.e. intensity (I (A)), voltage (V (v)) and welding speed (S (mm/min)) have been tested to evaluate four output mechanical properties i.e. penetration depth and maximum strain (ε (%)), tensile strength (σ (MPa)) and impact energy (IE (MPa)). Taguchi L9 orthogonal array is employed to extract mathematical models and welding parameters effects on output properties. It was deduced that welding current has a significant influence on tensile strength, strain and penetration depth properties followed by welding speed and voltage. This study delves into the investigation of sub-criteria of welding process through the use of AHP method coordinately with Taguchi results to identify the optimal filler rod (Ri). Taguchi's biggest effect parameter is included in the AHP matrix to choose the best welding rod by adopting different welding parameters with preheating temperature (T °C).