Enhancement in mechanical properties and corrosion resistance of 2507 duplex stainless steel via friction stir processing

Ma, Chengyue; Zhou, Li; Zhang, R.X.; Li, D.G.; Shu, Fengyuan; Song, Xiaoguo; Zhao, Yunqiang

doi:10.1016/j.jmrt.2020.05.057

Cited by 48 publications

(7 citation statements)

References 28 publications

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“…It was observed that with the increase in advancing speed, grain size reduced until 100 mm/min then increased again. Similarly, Ma et al [ 38 ] investigated 2507 DSS using the W-25Re FSP tool with a transverse speed in the range of 50–200 mm/min and a constant rotation speed of 400 rpm. The dominating factor for grain size refinement in FSP at transverse speed from 50 to 100 mm/min was attributed to a decrease in heat input that restricted grain growth, whereas speeds ranging from 100 to 200 mm/min showed a gradual increase in grain size due to lower strain rate.…”

Section: Influence Of Fsp On Microstructure and Tensile Behavior Of Steelsmentioning

confidence: 99%

Friction Stir Processing Influence on Microstructure, Mechanical, and Corrosion Behavior of Steels: A Review

et al. 2021

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Friction stir processing (FSP) technology has received reasonable attention in the past two decades to process a wide range of materials such as aluminum, magnesium, titanium, steel, and superalloys. Due to its thermomechanical processing nature, FSP is used to alter grain structure and enhance mechanical and corrosion behavior in a wide range of steels. The refinement in grains and phase transformations achieved in steel after FSP affects hardness, tensile properties, fracture toughness, fatigue crack propagation rate, wear resistance, and corrosion resistance. A number of review papers are available on friction stir welding (FSW) or FSP of nonferrous alloys. In this article, a comprehensive literature review on the FSP/FSW of different types of steels is summarized. Specifically, the influence of friction stir processing parameters such as advancing speed, rotational speed, tool material, etc., on steels’ performance is discussed along with assessment methodologies and recommendations.

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Section: Influence Of Fsp On Microstructure and Tensile Behavior Of Steelsmentioning

confidence: 99%

Friction Stir Processing Influence on Microstructure, Mechanical, and Corrosion Behavior of Steels: A Review

et al. 2021

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“…Ferrite has lower pitting resistance equivalent numbers (PREN) than austenite, as it has lower levels of N, favoring the pitting corrosion and also promoting lower values in critical pitting temperature (CPT) tests [ 6 , 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

“…As shown in the Cr–Ni–68%Fe pseudobinary diagram ( Figure 1 ), the solidification of super duplex steels starts with primary ferrite, which turns into austenite [ 3 , 7 , 8 , 9 ]. The addition of nitrogen in the molten pool favors the formation of austenite because it acts by displacing the solvus line of the Cr–Ni–68%Fe pseudobinary diagram [ 10 ], increasing (hatched region) the biphasic area (austenite (γ) + ferrite (δ)) in Figure 1 .…”

Section: Introductionmentioning

confidence: 99%

Increasing the Corrosion Resistance in the UNS S32750 Super Duplex Steel Welded Joints through Hybrid GTAW-Laser Welding and Nitrogen

et al. 2023

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The development of techniques to improve the welding of super duplex steels is necessary in order to ensure that the phase balance and properties of the material are not affected during this process. Hybrid arc-laser welding is a perfect combination of the advantages of both processes, producing deeper weld beads with more balanced phases than the pulsed laser process. Here, the objective was to improve the corrosion resistance of UNS S32750 weld beads by increasing the volumetric austenite percentage in the fusion zone (FZ) with a hybrid process of GTAW (gas tungsten arc welding) and pulsed laser Nd-YAG (neodymium-doped yttrium aluminum garnet). Welds were performed in bead on plate conditions with fixed laser parameters and a varying heat input introduced through the GTAW process. Additionally, welds within a nitrogen atmosphere were performed. After base metal characterization, an analysis of the FZ and heat affected zone were performed with optical microscopy, scanning electron microscopy and critical pitting tests (CPT). The synergy between the thermal input provided by the hybrid process and austenite-promoting characteristic of nitrogen led to a balanced volumetric austenite/ferrite fraction. Consequently, the results obtained in CPT tests were better than conventional welding processes, such as laser or GTAW solely.

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“…C.Y. Ma [15] found that the use of friction stir processing on 2507 DSS could refine the grain, and the grain refinement in the stirring zone promoted the diffusion of elements, which improves the mechanical properties and corrosion resistance of 2507 DSS. J.D.…”

Section: Introductionmentioning

confidence: 99%

Cavitation Erosion Behavior of 2205 and 2507 Duplex Stainless Steels in Distilled Water and Artificial Seawater

Wu,

Lian,

et al. 2023

Tribology Online

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Herein, cavitation erosion tests were carried out on 2205 and 2507 duplex stainless steels (DSSs) in distilled water and artificial seawater using ultrasonic cavitation erosion equipment. Optical microscope (OM), X-ray diffractometer (XRD), and scanning electron microscope (SEM) were used to observe the microstructure and cavitation erosion morphology of the specimens. Cavitation erosion and corrosion behaviors of the specimens were analyzed and the synergistic effect between cavitation erosion and corrosion in artificial seawater was also examined. The results show that the cavitation erosion resistance of 2507 DSS is better than that of 2205 DSS in all kinds of solutions. The destruction occurs first in ferrite due to its lower plasticity. The synergistic effect of cavitation erosion and corrosion accelerates the destruction of the material, and the mass loss caused by cavitation erosion-corrosion synergy for 2205 DSS is higher than that of 2507 DSS.

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Enhancement in mechanical properties and corrosion resistance of 2507 duplex stainless steel via friction stir processing

Cited by 48 publications

References 28 publications

Friction Stir Processing Influence on Microstructure, Mechanical, and Corrosion Behavior of Steels: A Review

Friction Stir Processing Influence on Microstructure, Mechanical, and Corrosion Behavior of Steels: A Review

Increasing the Corrosion Resistance in the UNS S32750 Super Duplex Steel Welded Joints through Hybrid GTAW-Laser Welding and Nitrogen

Cavitation Erosion Behavior of 2205 and 2507 Duplex Stainless Steels in Distilled Water and Artificial Seawater

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