doi:10.1007/s12613-019-1925-3

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文章导航 > 矿物冶金与材料学报（英文） > 2020 > 27(1): 119-127

A. Taheri, B. Beidokhti, B. Shayegh Boroujeny, and A. Valizadeh, Characterizations of dissimilar S32205/316L welds using austenitic, super-austenitic and super-duplex filler metals, Int. J. Miner. Metall. Mater., 27(2020), No. 1, pp. 119-127. https://doi.org/10.1007/s12613-019-1925-3

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A. Taheri, B. Beidokhti, B. Shayegh Boroujeny, and A. Valizadeh, Characterizations of dissimilar S32205/316L welds using austenitic, super-austenitic and super-duplex filler metals, Int. J. Miner. Metall. Mater., 27(2020), No. 1, pp. 119-127. https://doi.org/10.1007/s12613-019-1925-3

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Research Article

Characterizations of dissimilar S32205/316L welds using austenitic, super-austenitic and super-duplex filler metals

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Abstract

Abstract

UNS S32205 duplex stainless steel plates were welded to AISI 316L stainless steel using the pulsed gas tungsten arc welding process with three different filler metals: ER2594, ER312, and ER385. The microstructures of the welds were characterized using optical and scanning electron microscopy, and all of the specimens were evaluated by ferrite measurements. The mechanical properties were studied through hardness, tensile, and impact tests. In addition, the pitting resistance equivalent number was calculated and cyclic polarization tests were performed to evaluate the corrosion resistance of the weld metal. The results showed that chromium nitride was formed in the heat-affected zone of the duplex side, whereas no sigma phase was detected in any of the specimens. The ferrite number increased from the root pass to the final pass. The absorbed energies of the impact test decreased with increasing ferrite number, whereas the tensile strength was enhanced. The fully austenitic microstructure of the specimen welded with ER385 exhibited the highest resistance to pitting corrosion at 25°C, and the super-duplex weld metal presented superior corrosion resistance at 50°C.
- stainless steel;
- mechanical properties;
- microstructure;
- welding

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Characterizations of dissimilar S32205/316L welds using austenitic, super-austenitic and super-duplex filler metals

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