Effect of Heat Input on Distortions and Residual Stresses Induced by Gas Tungsten Arc Welding in SS 316L to INCONEL625 Multipass Dissimilar Welded Joints

Vemanaboina, Harinadh; Babu, B. Sridhar; Gundabattini, Edison; Ferro, Paolo; Kumar, Kaushik

doi:10.1155/2021/1028461

Cited by 12 publications

(3 citation statements)

References 23 publications

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“…The heat input of welding was reported to affects its mechanical properties [29]. The increased heat input leads to longer cooling rates [31], which, therefore, causes increased internal stresses and residual strains in the welding [31,32,33]. The internal stresses have been reported to cause decreased hardness [34].…”

Section: Resultsmentioning

confidence: 99%

Study the Influence of Welding Parameters by Taguchi’s Design on the Mechanical Properties of Welded Mild Steel (S235jr)

Elfallah

2023

Jurnal Teknologi

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Gas metal arc welding is a leading process in fusion welding with increased productivity and good quality. The welding parameters are crucial in determining welding quality, cost, and productivity. In this study, mild steel with a 10-mm-thick sheet was welded by gas metal arc welding under predetermined parameters of welding voltage, wire feed speed, and groove shape. The analysis made by Taguchi’s design to investigate the effect of these parameters on tensile strength and Vickers micro-hardness of welding. The microstructure of the fusion zone and heat-affected zone is analyzed to monitor their change concerning the mechanical properties. The results showed that tensile strength decreased with decreased hardness. Also, the tensile strength and hardness were higher (a maximum of 305 MPa and 2170 HVN) at welding made at a lower voltage (20 volts), lower wire feed speed (5.9 m/min), and V-shaped base metal groove. The increased precipitation of perlite structure was shown during welding, which has lower tensile strength and hardness. Widmanstatten ferrite and coarser α-ferrite were presented for welding with a lower cooling time. Taguchi’s design showed that voltage at 20 volts has the highest effect on tensile strength, followed by wire feed speed at 5.9 m/min and V-shaped welding.

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Section: Resultsmentioning

confidence: 99%

Study the Influence of Welding Parameters by Taguchi’s Design on the Mechanical Properties of Welded Mild Steel (S235jr)

Elfallah

2023

Jurnal Teknologi

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“…It was reported that the weld metal exhibited a significant variation in residual stresses, ranging from 145 MPa at the top to 180 MPa at the FZ. 16 Many such studies are reported where fatigue failures have been found to be concerning and hence studied. Fatigue crack propagation (FCP) behaviour of type 316 (16-8-2) weldments in an air environment was studied at five temperatures over a range of 24°C to 649°C for GTAW and submerged arc welding (SAW) welds.…”

Section: Introductionmentioning

confidence: 99%

Investigations on the role of Inconel 82 additions on improving fatigue and corrosion behaviour of gas tungsten arc AISI 316L stainless steel claddings

Kaur,

Malhotra,

Kumar

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part L:

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In the present work, single- and double-weld layers of Inconel 82 were added to 316L stainless steel claddings using the gas tungsten arc welding process with the aim of improving the fatigue and sensitization performance of such clad overlays. These overlays were subjected to a high-temperature sensitization treatment of 750˚C/24 h (air-cooled) to induce precipitation, and then solution treated at 1050˚C/2 h (furnace-cooled) to mitigate the ill effects of intermetallic precipitation. Carbides of types Cr23C6 and Cr7C3 were detected in the aged 316L clad, which occurred interdendritically. These deleterious phases decreased the fatigue crack growth resistance of conventional 316L, but the addition of Inconel 82 resulted in inducing crack-arresting tendencies in it and thus significantly increasing its resistance against fatigue crack propagation. Solution annealing treatment resulted in the dissolution of deleterious phases, due to which the fatigue performance of these clads improved significantly. Among all the specimens, 316L clad with the double layer of Inconel 82 in the solution-annealed condition offered the highest resistance to fatigue crack growth. Corrosion performance evaluated via sensitization studies shows that ageing degraded the corrosion performance of 316L weld overlays, but the addition of Inconel 82 improved it. This study establishes that the addition of Inconel 82 can significantly improve the fatigue and corrosion performance of conventional 316L weld claddings.

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“…The higher amount of heat input means a longer time for welding to solidify and cool [29]. This puts increased internal stresses into the FZ [29][30][31], which was reported to decrease its hardness [32]. The decreased hardness has caused lower transverse tensile strength.…”

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confidence: 99%

Microstructure and Mechanical Properties Analysis of Mild Steel with Different Groove Shape Welded Using GMAW

Elfallah

Allafi²

2023

MSF

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This paper will discuss the effect of welding variables on the transverse tensile strength and hardness of mild steel welding made by GMAW. The welding variables included are base metal thickness, welding voltage, wire feed speed (WFS), and base metal groove shape. The results show that higher welding transverse tensile strength has obtained higher FZ hardness, while they both increased with decreased welding heat input. E.g., the highest tensile strength (238 MPa) has shown 2162 HV at 768 J/mm heat input, while the lowest tensile strength (120 MPa) of welding made at 2376 J/mm has shown 2108 HV. The FZ of welding made at V groove-shaped base metal has higher hardness and transverse tensile strength, as shown 2159.5 HV and 215 MPa in order when compared to 177 MPa and 2147 HV for X groove-shaped. The hardness at V groove-shaped FZ had an average of 2159.5 HV, while the hardness at X groove-shaped had an average of 2147 HV at 10 mm base metal thickness. The increased hardness of V groove-shaped FZ could be related to the increased stresses at V groove-shaped due to interpass heat input. The intricate physical shape of FZ and HAZ for X groove configuration possibly contributes to the lower transverse tensile strength of welding. A favorably increased hardness and transverse tensile strength are associated with softer and finer ferritic and perlitic grains in FZ and less dendritic perlite structure in HAZ. The Widmanstatten ferrite has contributed to decreased tensile strength.

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Effect of Heat Input on Distortions and Residual Stresses Induced by Gas Tungsten Arc Welding in SS 316L to INCONEL625 Multipass Dissimilar Welded Joints

Cited by 12 publications

References 23 publications

Study the Influence of Welding Parameters by Taguchi’s Design on the Mechanical Properties of Welded Mild Steel (S235jr)

Study the Influence of Welding Parameters by Taguchi’s Design on the Mechanical Properties of Welded Mild Steel (S235jr)

Investigations on the role of Inconel 82 additions on improving fatigue and corrosion behaviour of gas tungsten arc AISI 316L stainless steel claddings

Microstructure and Mechanical Properties Analysis of Mild Steel with Different Groove Shape Welded Using GMAW

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