Corrosion behavior of friction stir welded lean duplex stainless steel

Sarlak, H.; Atapour, Masoud; Esmailzadeh, Mojtaba

doi:10.1016/j.matdes.2014.10.060

Cited by 92 publications

(36 citation statements)

References 47 publications

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“…Based on the advancing and retreating sides of the working tool, the TMAZ located adjacent to the SZ can be classified into TMAZ-AS and TMAZ-RS. As verified by other authors [18][19][20]24], no obvious heat affected zone is observed because of the relatively low heat input.. Figure 4b shows the schematic of microstructure of the as-received BM. The BM exhibits a microstructure of austenitic islands embedded in ferrite matrix.…”

Section: Materials and Experimentssupporting

confidence: 70%

“…The grain size difference between the SZ and the BM, as observed in the microstructure and EBSD maps, suggests that dynamic recrystallization (DRX) occurs in the austenite and ferrite phases during FSW. As reported in related studies on the FSW, microstructures in the SZ experiences severe deformation and high temperature; thus, DRX leads to fine grains [18][19][20][24][25][26]. Figure 6 shows the EBSD maps of the BM and SZ.…”

Section: Microstructural Evolutionmentioning

confidence: 65%

“…Existing investigations report that only a few studies have explored the effect of FSW on the microstructure, mechanical properties, and corrosion properties of DSSs [18][19][20]. Sato [18] has demonstrated that FSW elicits the desirable mechanical properties of SAF2507; these properties include defect-free weld and generation of fine and equiaxed recrystallized grains in the stir zone (SZ).…”

Section: Introductionmentioning

confidence: 99%

“…Saeid [19] has investigated the mechanism of the grain refinement of DSSs by using electron backscattered diffraction (EBSD) and found that the mechanism is correlated with different mechanisms of dynamic recrystallization. Furthermore, the corrosive behavior of lean DSSs subjected to FSW was studied by Sarlak, who found that the resistance of DSSs to the local and pitting corrosion of weldments is superior to that of base metals (BMs) [20].…”

Section: Introductionmentioning

confidence: 99%

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Characterization of the Microstructure, Mechanical Properties, and Corrosion Resistance of a Friction-Stir-Welded Joint of Hyper Duplex Stainless Steel

Xing-long

et al. 2017

Metals

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This study investigates the microstructure, mechanical properties, and corrosion resistance of a friction-stir-welded joint of the hyper duplex stainless steel SAF2707. Friction stir welding (FSW) is performed at a tool rotation rate of 400 rpm and a welding speed of 100 mm/min. The microstructure of the joints is examined using scanning electron microscopy and X-ray diffraction. Tensile test and fractography are subsequently employed to evaluate the mechanical properties of the joints. Results show that the grain size of the stir zone (SZ) is smaller than that of the base metal (BM). Electron back-scattered diffraction analysis reveals that fine-equiaxed grains form in the SZ because of the dynamic recrystallization during the FSW. These grains become increasingly pronounced in the austenite phase. The tensile specimens consistently fail in the BM, implying that the welded joint is an overmatch to the BM. Moreover, the welded joints consist of finer grains and thus display higher tensile strength than their BMs. Potentiodynamic polarization curves and impedance spectroscopy both demonstrate that the corrosion resistance of the SZ is superior to that of the base material.

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Section: Materials and Experimentssupporting

confidence: 70%

Section: Microstructural Evolutionmentioning

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Characterization of the Microstructure, Mechanical Properties, and Corrosion Resistance of a Friction-Stir-Welded Joint of Hyper Duplex Stainless Steel

Xing-long

et al. 2017

Metals

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“…In particular, DSS is employed in chemical, wastewater, and marine engineering fields, as well as in desalination industries and marine constructions [14][15][16][17][18][19]. Given the high corrosion resistance of DSS, this material is favorable for shipbuilding, petrochemical, paper, and nuclear industries and can gradually substitute the expensive 300 ASS [20]. DSS is also the preferred material for petroleum and refining industries [21].…”

Section: Introductionmentioning

confidence: 99%

Effects of Heat Input on Microstructure, Corrosion and Mechanical Characteristics of Welded Austenitic and Duplex Stainless Steels: A Review

Mohammed

Ishak

Aqida

et al. 2017

Metals

105

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Abstract:The effects of input heat of different welding processes on the microstructure, corrosion, and mechanical characteristics of welded duplex stainless steel (DSS) are reviewed. Austenitic stainless steel (ASS) is welded using low-heat inputs. However, owing to differences in the physical metallurgy between ASS and DSS, low-heat inputs should be avoided for DSS. This review highlights the differences in solidification mode and transformation characteristics between ASS and DSS with regard to the heat input in welding processes. Specifically, many studies about the effects of heat energy input in welding process on the pitting corrosion, intergranular stress, stress-corrosion cracking, and mechanical properties of weldments of DSS are reviewed.

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On the Joining of High‐Strength Dissimilar Inconel 600 and SS316L Materials by Friction Stir Welding with Improved Mechanical Properties and Localized Corrosion Resistance

Raj,

Biswas,

Vadani

et al. 2024

Adv Eng Mater

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The present work thoroughly investigates the friction stir welding of dissimilar high‐strength materials Inconel 600 (IN600) and SS316L and its effect on welded microstructure, mechanical, and corrosion properties. The microstructure and crystallographic textures of the nugget zone are investigated using the electron backscattered diffraction technique and transmission electron microscopy. The mechanical properties of the joints are evaluated using hardness and tensile testing and the electrochemical behavior of the joints is also investigated. The microstructural examination reveals a high degree of material plastic flow, both IN600 and SS316L, in the weld zone with uniform distribution of fine M23C6 carbides. The weld zone comprises a dynamically recrystallized fine‐grained structure of γ‐Fe and γ‐Ni that results in improved mechanical properties and high weld efficiency (≈95%) of the joints. The fine microstructure in the weld zone is characterized by a high dislocation density in these low stacking fault materials. The electrochemical results show that the corrosion resistance of the cross‐sectional region is higher than the top surface region and lower than the base IN600. The combined effect of grain refinement, high degree of material intermixing, and distribution of fine carbide precipitates cumulatively is found responsible for the improved corrosion resistance of the nugget zone.

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Corrosion behavior of friction stir welded lean duplex stainless steel

Cited by 92 publications

References 47 publications

Characterization of the Microstructure, Mechanical Properties, and Corrosion Resistance of a Friction-Stir-Welded Joint of Hyper Duplex Stainless Steel

Characterization of the Microstructure, Mechanical Properties, and Corrosion Resistance of a Friction-Stir-Welded Joint of Hyper Duplex Stainless Steel

Effects of Heat Input on Microstructure, Corrosion and Mechanical Characteristics of Welded Austenitic and Duplex Stainless Steels: A Review

On the Joining of High‐Strength Dissimilar Inconel 600 and SS316L Materials by Friction Stir Welding with Improved Mechanical Properties and Localized Corrosion Resistance

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