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<p>This study evaluates the prediction of thermal response in dissimilar P92–AISI 304L steel multi-pass welded joints using an integrated approach combining numerical simulation with the modified analytical model (AM) for the GMAW-Pulse process. The proposed framework enhances computational efficiency while providing better prediction of thermal gradients within the weld pool and adjacent regions. The analytical model accounts for two distinct heat sources during welding include continuous heat from the welding arc and the intermittent heat from droplets of superheated filler metal. The arc heat is modeled as a continuous double ellipsoidal heat source represents sustained energy input to the weld pool, and the filler metal droplets are treated as point heat sources that are deposited intermittently. These two heat sources differ in nature and are analyzed using separate analytical approach and their combined effect is then used to estimate the temperature within the weld pool, which is subsequently incorporated into the numerical simulation. The results indicate that proposed analytical model has a better agreement between the measured and predicted calculations with a deviation in the order of ± 8%.</p>

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Thermal aspects of dissimilar multi-pass P92–AISI 304L welds using a synergistically modified heat source model and numerical simulation

  • 期刊论文

  • 发表日期：

    2026年7月14日

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  • Pavan Meena,
  • Ramkishor Anant

摘要

This study evaluates the prediction of thermal response in dissimilar P92–AISI 304L steel multi-pass welded joints using an integrated approach combining numerical simulation with the modified analytical model (AM) for the GMAW-Pulse process. The proposed framework enhances computational efficiency while providing better prediction of thermal gradients within the weld pool and adjacent regions. The analytical model accounts for two distinct heat sources during welding include continuous heat from the welding arc and the intermittent heat from droplets of superheated filler metal. The arc heat is modeled as a continuous double ellipsoidal heat source represents sustained energy input to the weld pool, and the filler metal droplets are treated as point heat sources that are deposited intermittently. These two heat sources differ in nature and are analyzed using separate analytical approach and their combined effect is then used to estimate the temperature within the weld pool, which is subsequently incorporated into the numerical simulation. The results indicate that proposed analytical model has a better agreement between the measured and predicted calculations with a deviation in the order of ± 8%.