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- W4285606656 abstract "Duplex stainless steel (DSS) has good oxidation resistance, mechanical properties and corrosion resistance because of the austenite and ferrite two-phase coexistence characteristics, so it has been widely used in the petrochemical, ocean engineering and other industries. In this paper, the butt welding of DSS 2205 pipes were conducted by the combination welding of gas tungsten arc welding and shielded metal arc welding (GTAW + SMAW), and full automatic GTAW respectively. The microstructure, mechanical and corrosion resistance properties of two welded joints were observed and measured. The results show that the ferrite content in the weld and the heat-affected zone (HAZ) of the GTAW + SMAW joint is higher than that of GTAW joint. The weld Charpy energy of GTAW joint is much higher than that of GTAW + SMAW joint, while the Charpy energy of both the fusion line and the HAZ of GTAW joint is slightly higher than that of GTAW + SMAW joint. The strain concentration occurs at the grain boundaries greater than 45°, and the smaller the grain size is, the more dispersed the strain is. The effect of the temperature on the pitting corrosion resistance is obvious. The pitting corrosion resistance of GTAW + SMAW joint is significantly lower than that of GTAW joint, and the pitting corrosion resistance of the root weld is poor, and the SMAW weld is worse than the GTAW weld (except for the root weld). The ferrite phase proportion is related to the pitting corrosion resistance. In a word, the performance of GTAW joint is better than that of GTAW + SMAW joint." @default.
- W4285606656 created "2022-07-16" @default.
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- W4285606656 date "2022-10-01" @default.
- W4285606656 modified "2023-10-12" @default.
- W4285606656 title "Comparative analysis of GTAW+SMAW and GTAW welded joints of duplex stainless steel 2205 pipe" @default.
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- W4285606656 doi "https://doi.org/10.1016/j.ijpvp.2022.104748" @default.
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