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<p>The post weld effect of (HI) heat input on dissimilar welded connections made of ASS304&#xa0;L&#xa0;and DSS 2205&#xa0;is the main subject of this study. The gas tungsten arc welding technique (GTAW) with ER2209 and ER309&#xa0;L&#xa0;filler was found to operate best with lower heat input (LHI)&#xa0;at&#xa0;0.51&#xa0;kJ/mm. The CIT-Charpy impact test, VMHT-Vickers micro-hardness test, was used to determine the properties of mechanical work on the dissimilar metal welds (DMWs). According to the mechanical examination, the average hardness of LHI are 275 ± 4&#xa0;Hv0.5(for 2209) and 247 ± 3&#xa0;Hv0.5 (for 309&#xa0;L).Here we observed that CP hardness increased by 41.45% and 21.68% for filler 2209 and 309&#xa0;L, while RPs hardness rises by 16.54% and 7.14% for filler 2209 and 309&#xa0;L respectively. Meanwhile Impact energy under 2209 filler weld increased by 12% and under 309L filler weld increased by 54%. Lower HI may be advantageous for the structural integrity of the welds, according to the mechanical characterization and microstructural observation.</p>

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Low Heat Input Effect on Mechanical and Micro-Structural Performance Over ASS304L/DSS2205 Steel Dissimilar GTA Weld

  • 期刊论文

  • 发表日期：

    2026年4月17日

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  • Gyanendu Sharma,
  • Bhupendra Singh Chauhan

摘要

The post weld effect of (HI) heat input on dissimilar welded connections made of ASS304 L and DSS 2205 is the main subject of this study. The gas tungsten arc welding technique (GTAW) with ER2209 and ER309 L filler was found to operate best with lower heat input (LHI) at 0.51 kJ/mm. The CIT-Charpy impact test, VMHT-Vickers micro-hardness test, was used to determine the properties of mechanical work on the dissimilar metal welds (DMWs). According to the mechanical examination, the average hardness of LHI are 275 ± 4 Hv0.5(for 2209) and 247 ± 3 Hv0.5 (for 309 L).Here we observed that CP hardness increased by 41.45% and 21.68% for filler 2209 and 309 L, while RPs hardness rises by 16.54% and 7.14% for filler 2209 and 309 L respectively. Meanwhile Impact energy under 2209 filler weld increased by 12% and under 309L filler weld increased by 54%. Lower HI may be advantageous for the structural integrity of the welds, according to the mechanical characterization and microstructural observation.