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<p>Microstructural and chemical analyses of a dissimilar welded joint between AL6XN super austenitic stainless steel and 2205 duplex stainless steel plates by scanning electron microscopy, energy-dispersive X-ray spectroscopy, electron backscatter diffraction, and X-ray diffraction were carried out. Gas-metal arc welding process used ERNiCrMo-3 filler wire and 95Ar, 3%N<sub>2</sub>, 2%O<sub>2</sub> as shielding gas. Voltage, current, and travel speed were set up to a heat input of 1.6&#xa0;kJ/mm. The analyses were done in the dilution, fusion, and heat-affected zones. The dilution percentage at the AL6XN SASS and the 2205 DSS interfaces yielded 12.97 and 13.75%, respectively. Phase analysis provided insights into microstructural evolution, including twin dissolution, at the HAZ-2205 DSS interface. The formed precipitates were rich in Nb, Mo, Ti, Al and Si. The Vickers microhardness measurements revealed variations attributed to thermal gradients and cooling rates.</p>

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Microstructural Analysis of the Dissimilar Weld AL6XN SASS and 2205 DSS Steels Plates

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年2月10日

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  • José Antonio Rodríguez-Torres,
  • Víctor Hugo López-Morelos,
  • Heriberto Granados-Becerra,
  • José Reyes-Gasga

摘要

Microstructural and chemical analyses of a dissimilar welded joint between AL6XN super austenitic stainless steel and 2205 duplex stainless steel plates by scanning electron microscopy, energy-dispersive X-ray spectroscopy, electron backscatter diffraction, and X-ray diffraction were carried out. Gas-metal arc welding process used ERNiCrMo-3 filler wire and 95Ar, 3%N2, 2%O2 as shielding gas. Voltage, current, and travel speed were set up to a heat input of 1.6 kJ/mm. The analyses were done in the dilution, fusion, and heat-affected zones. The dilution percentage at the AL6XN SASS and the 2205 DSS interfaces yielded 12.97 and 13.75%, respectively. Phase analysis provided insights into microstructural evolution, including twin dissolution, at the HAZ-2205 DSS interface. The formed precipitates were rich in Nb, Mo, Ti, Al and Si. The Vickers microhardness measurements revealed variations attributed to thermal gradients and cooling rates.