Precipitation and phase transformation behavior during high-temperature aging of a cobalt modified Fe-24Cr-(22-x)Ni-7Mo-xCo superaustenitic stainless steel

Liao, Luhai; Li, Jingyuan; Zhao, Zhengzhi; Xu, Fanghong; Zhang, Wei

doi:10.1007/s10853-021-06740-1

J Mater Sci

2022

DOI: 10.1007/s10853-021-06740-1

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Precipitation and phase transformation behavior during high-temperature aging of a cobalt modified Fe-24Cr-(22-x)Ni-7Mo-xCo superaustenitic stainless steel

Luhai Liao

Jingyuan Li

Zhengzhi Zhao

et al.

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Cited by 9 publications

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Mechanical and Corrosion Properties of Super Austenitic Stainless Steel Joint for Double‐Sided Synchronous TIP TIG Arc Butt Welding

Wang,

Lang,

Tan

2024

steel research int.

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Super austenitic stainless steel 254SMO (254SMO SASS) plates are joined by double‐sided double‐arc synchronous TIP TIG butt welding (DSSTTABW) using ER NiCrMo3 wire, and the micro‐structure, mechanical and corrosion properties of 254SMO SASS joints are investigated subsequently. Results show that solidification grain boundary and solidification sub‐grain boundary can be observed in fusion zone. A small amount of σ phase precipitates in the weld, while χ phase is found in the transition zone, but no solidification crack occurs in weld and heat affected zone (HAZ). 254SMO SASS joint has higher micro‐hardness and lower tensile strength and elongation compared to base metal. During transverse tensile process, 254SMO SASS joints fail in the weld zone in a ductile mode. Electrochemical corrosion performance tests indicate that 254SMO SASS joint achieve equivalent pitting corrosion resistance and similar passive mechanism to base metal in 3.5 wt% NaCl solution. The passivation film on the surface of both joint and base metal display as n‐p semi‐conductive character, but the film stability of 254SMO joint surface is slightly poorer compared to base material. The surface passivation film of 254SMO joint primarily consists of oxides of Fe, Cr, and Mo before potentiodynamic polarization, while hydroxides of Fe and Cr are also observed after polarization.

show abstract

Mechanical and Corrosion Properties of Super Austenitic Stainless Steel Joint for Double‐Sided Synchronous TIP TIG Arc Butt Welding

Wang,

Lang,

Tan

2024

steel research int.

View full text Add to dashboard Cite

show abstract

Unveiling Hot Deformation Behavior and Dynamic Recrystallization Mechanism of 654SMO Super-Austenitic Stainless Steel

Liao

Zhao

Zhang

et al. 2023

Metall Mater Trans A

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Influence Mechanism of Boron Addition on the Precipitation Behavior of Super Austenitic Stainless Steel S32654

Yu,

Zhang,

et al. 2024

Met. Mater. Int.

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Precipitation and phase transformation behavior during high-temperature aging of a cobalt modified Fe-24Cr-(22-x)Ni-7Mo-xCo superaustenitic stainless steel

Cited by 9 publications

References 53 publications

Mechanical and Corrosion Properties of Super Austenitic Stainless Steel Joint for Double‐Sided Synchronous TIP TIG Arc Butt Welding

Mechanical and Corrosion Properties of Super Austenitic Stainless Steel Joint for Double‐Sided Synchronous TIP TIG Arc Butt Welding

Unveiling Hot Deformation Behavior and Dynamic Recrystallization Mechanism of 654SMO Super-Austenitic Stainless Steel

Influence Mechanism of Boron Addition on the Precipitation Behavior of Super Austenitic Stainless Steel S32654

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