Analysis of Metallurgical and Mechanical Properties of Continuous and Pulsed Current Gas Tungsten Arc Welded Alloy C-276 with Duplex Stainless Steel

Manikandan, M.; Arivazhagan, N.; Arivarasu, M.; Mageshkumar, K.; Rajan, Deva N.; Murugan, Banupriya; Prasanth, P; Sukumar, Shivashankar; Vimalanathan, R.

doi:10.1007/s12666-017-1045-6

Cited by 26 publications

(4 citation statements)

References 15 publications

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“…[5][6][7] The effect of ambient pressure on the microstructure, pitting corrosion resistance, and impact toughness of the DSS weld metal fabricated via flux-cored arc welding were studied by Hu et al 8 The microstructure measurement revealed that the ferrite content in the weld metal made at 0.45 MPa is the lowest, followed by that of 0.75 MPa and 0.15 MPa. The microstructure and mechanical characteristics of DSS weld samples made by continuous and pulsed current gas tungsten arc welded (GTAW) were investigated by Manikandan et al 9 They achieve the fine grain size in the weld samples during the pulsed current GTAW owing to lower heat input with rapid solidification. In addition, due to the proportions of microsegregation, the mechanical features of the joining specimens are higher in comparison to the base metal.…”

Section: Introductionmentioning

confidence: 99%

A comparison of microstructure and mechanical characteristics correlation of the joint specimens for duplex stainless steel UNS S32304 and super-duplex stainless steel UNS S32750: The role of post-weld heat treatment

Tahaei,

Vanani,

Abbasi

et al. 2024

Proceedings of the Institution of Mechanical Engineers, Part L:

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The present investigation studies the impact of post-weld heat treatment (PWHT) on the microstructure and mechanical characteristics of joints made by gas tungsten arc welding between duplex stainless steel and super-duplex stainless steel specimens. The PWHT process was considered at 1100 °C for 10 minutes followed by water quenching on UNS S32304 and UNS S32750 materials. Scanning electron microscopy, optical microscopy, X-ray diffractometry (XRD), and energy dispersive X-ray analyses have been applied in microstructure evolution, including recognizing local chemical contents and elemental distribution. To analyze the mechanical characteristics of samples, tensile and hardness tests were performed. It was shown that after applying PWHT, the morphology of the austenite varied becoming mostly intergranular/spheroidal in shape, accompanied by an improvement in the percentages of austenite. This investigation indicates the PWHT results in restoring an equal percentage of both phases. The phase percentages, based on both ASTM E1245 and ASTM E562, show a good agreement between the austenite and ferrite phases of weld materials. According to XRD, the phases are mainly ferrite and austenite with different lattice parameters with no evidence of unwanted intermetallic phases. It was concluded that the PWHT process plays a crucial role in the ductility of joint specimens due to the phase balance between austenite and ferrite.

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Section: Introductionmentioning

confidence: 99%

A comparison of microstructure and mechanical characteristics correlation of the joint specimens for duplex stainless steel UNS S32304 and super-duplex stainless steel UNS S32750: The role of post-weld heat treatment

Tahaei,

Vanani,

Abbasi

et al. 2024

Proceedings of the Institution of Mechanical Engineers, Part L:

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“…In earlier days, the FSW process was only used to join aluminium alloy materials for structural applications, and the FSWed joints of Al-alloys exhibited much better joint performance than the fusion welded joints [1]. Later it has been used to process materials like steels, nickel alloys [2][3][4], magnesium alloys [5,6], titanium alloys [7,8], aluminum alloys [9,10], copper and copper alloys [11][12][13][14]. Among them, copper has superior properties like high thermal and electrical conductivity, ductility, and corrosion resistance [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Microstructural and Mechanical Characteristics of Pure-Cu/brass Dissimilar Joints Welded by Friction Stir Welding Using Various Process Parameters

Ramesh¹,

Tharwan

et al. 2022

Advances in Materials Science and Engineering

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FSW (friction stir welding) is a solid-state joining method that attracts interest from all industries. The influence of various tool rotational speeds on the microstructure and mechanical characteristics of dissimilar pure Cu-brass joints has been investigated. The travel speed and vertical load were kept constant in the welding trials, at 40 mm/min and 10 kN, respectively, while the tool rotational speed varied from 1000 to 1400 rpm. The increase of the rotational speed to 1400 rpm resulted in degradation of the mechanical properties. The stir zone grain structure was refined; however, the grain size was irregular. Grain refining occurs due to a continuous and discontinuous dynamic recrystallization mechanism. In the grain interior, there were many large dislocations, identifying that incomplete recrystallization took part within the SZ. Instead, the lower rotational speed, i.e., 1000 rpm, led to more uniform grain refinement in the SZ. Moreover, in contrast to the welded zone where very fine grains exist, the base metal and thermomechanically heat-affected zone display coarser grains. Because of the microstructural modification, the stir zone’s mechanical characteristics were higher than the base materials, and the mechanical strength and plasticity were simultaneously upgraded. These results indicate that the size of the grains is independent of rotational speed. And mechanical properties like hardness and impact strength decreased as the rotational speed increased.

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“…It severely affects the fatigue and mechanical behaviour of the weldments. 5,6 The appropriate selection of the welding process and filler metals may mitigate the above-mentioned issues. Various researchers highlighted the importance of the use of fillers in dissimilar alloy weld joints.…”

Section: Introductionmentioning

confidence: 99%

“…They also observed the absence of secondary (P and m) phases and improved mechanical characteristics in the current pulsing mode. Manikandan et al 6 examined the dissimilar weld microstructure and mechanical properties of alloy C-276 and with duplex stainless steel using GTAW and PCGTAW technique. The authors observed the absence of defects and enhanced metallurgical properties in the dissimilar weld joint using current pulsation technique.…”

Section: Introductionmentioning

confidence: 99%

Development of arc welding technique to preclude microsegregation in the dissimilar joint of Alloy C-2000 and C-276

Arulmurugan

Munusamy

Balaji

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part E:

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Hastelloy C-2000 and C-276 are widely used in Flue Gas Desulphurization (FGD) system and Chemical Processing Industries (CPI). Current work is focused on weld microstructure, and mechanical properties (structure-property relationship) of the dissimilar combination of alloy C-2000 and C-276. Multi-pass Pulsed Current Gas Tungsten Arc (PCGTA) welding was adopted for joining the dissimilar alloys using the filler ERNiCrMo-17. Microstructural characteristics of the weld joint were assessed by Optical and Scanning Electron Microscope (SEM). Weld interface microstructure examination revealed the presence of grain coarsening near the Heat Affecting Zone (HAZ) of the alloy C-276 side. SEM analysis shows the absence of secondary Topologically Closed Packed (TCP) phases in the Inter-Dendritic (ID) regions of the dissimilar weld. Micro-segregation of alloying elements in the weldment was assessed by Energy-Dispersive X-ray Spectroscopy (EDS). X-Ray Diffraction (XRD) analysis had been carried out to identify the phase constitution and average grain size. Strength, toughness, and hardness of the dissimilar weld were evaluated with the support of the tensile test, Charpy impact test, and Vicker’s hardness test. Tensile study showed that all the tensile fracture occurred at the base metal side of alloy C-276. The average toughness of the dissimilar alloy joint was noted about 84 J. Hardness test results indicated that fusion zone (FZ) hardness value was 6.19% and 2.27% superior to the candidates’ material (C-276 and C-2000) employed in this study. The refined grain structure and absence of microsegregation resulted in the highest hardness in the dissimilar weld FZ. Results revealed the substantiated use of PCGTA welding for the effective joining of dissimilar alloys of C-2000 and C-276 through the evaluation of metallurgical and mechanical characteristics.

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Analysis of Metallurgical and Mechanical Properties of Continuous and Pulsed Current Gas Tungsten Arc Welded Alloy C-276 with Duplex Stainless Steel

Cited by 26 publications

References 15 publications

A comparison of microstructure and mechanical characteristics correlation of the joint specimens for duplex stainless steel UNS S32304 and super-duplex stainless steel UNS S32750: The role of post-weld heat treatment

A comparison of microstructure and mechanical characteristics correlation of the joint specimens for duplex stainless steel UNS S32304 and super-duplex stainless steel UNS S32750: The role of post-weld heat treatment

Microstructural and Mechanical Characteristics of Pure-Cu/brass Dissimilar Joints Welded by Friction Stir Welding Using Various Process Parameters

Development of arc welding technique to preclude microsegregation in the dissimilar joint of Alloy C-2000 and C-276

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