Effect of wire feed rate on microstructure development during bead on plate welding of microalloyed steel using P-GMAW

John, Merbin; Kumar, P. Ashok; Bhat, K. Udaya

doi:10.1016/j.matpr.2020.09.805

Cited by 4 publications

(7 citation statements)

References 21 publications

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“…The decrease in HAZ hardness is mainly due to the thermal effect caused by welding heat and grain size. 17,53,54 The weld zone's average hardness is 268 and 256 HV at 10 and 11 m/min WFR, respectively. Among the two WFRs, 10 m/min WFR welds showed the highest hardness.…”

Section: Resultsmentioning

confidence: 99%

“…The Microstructure of weld joints revealed the presence of the carbides in the weld metal and HAZ, including M 6 C precipitates, TiC precipitates, and M 23 C 6. 33,[38][39][40] The HAZ microstructure is slightly coarser than the base metal for 10 and 11 m/min WFR due to the weld thermal cycle. In addition, the HAZ formation of coarse and fine prior-austenitic grains and inter-critical regions (Figure 6) is observed.…”

Section: Microstructural Analysismentioning

confidence: 99%

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Investigation of microstructure, mechanical, and corrosion properties of Inconel 617 joints welded by laser–MIG hybrid welding

Kumar

Balasubramanian

Prabhakar

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part L:

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The demand for Nickel-based superalloy of Inconel 617 material is increasing for manufacturing hot section components of gas turbines, chemical, and nuclear power plants. It has excellent corrosion resistance in high-temperature environments. In the present study, laser–MIG hybrid welding consisting of a 3.5 kW CO2 laser in combination with a MIG welding system was utilized to weld 10 mm thick Inconel 617 plates with the wire feed rates (WFR) of 10 and 11 m/min in a single pass to analyze the welds microstructure, mechanical, and corrosion properties. The results revealed that the microstructure of the weld zone is composed of cellular crystals with dendrites and equiaxed sub-grains. Electron backscattered diffraction (EBSD) studies revealed coarse columnar dendrites and equiaxed grains at the center of weld joints with the same crystallographic orientation across the fusion boundary. The XRD analysis revealed the dominant gamma and gamma prime (γ/γ′) [(Ni/Ni3(AlTi))] phases along with the presence of minor carbide peaks such as Ti (C, N), M23C6, Cr (C, N), and M6C. The BM has a lower hardness (232 HV) and higher impact energy (236 J) than the weld joints. Similarly, the increase in WFR results in a decrease in microhardness (268–256 HV) values and an increase in impact energy (199–212 J). The weld joints exhibit good bend ductility without any cracks. The potentiodynamic polarization results revealed a lower corrosion rate of 0.212 mpy for the base metal than for the weld joints. The increase of WFR increased the weld metal corrosion rate from 0.342 to 0.427 mpy due to an increase in heat input (0.516–0.615 kJ/mm) and solidification time, which caused the coarsening of the grains resulting in lower grain boundary density and anode reaction to accelerate, which deteriorated the corrosion resistance of the welds.

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Section: Resultsmentioning

confidence: 99%

Section: Microstructural Analysismentioning

confidence: 99%

Investigation of microstructure, mechanical, and corrosion properties of Inconel 617 joints welded by laser–MIG hybrid welding

Kumar

Balasubramanian

Prabhakar

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part L:

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“…Welding AHSS is frequently required to realize the full potential of these steels and to provide designers with more options. Numerous investigations by various authors [14,15,34,36,37,39,44,[64][65][66] have been conducted into welding AHSS, particularly on the use of gas GMAW and laser welding. The weldability of these steels was examined under various situations utilizing various welding methods, including laser welding, ultra-narrow gap laser welding, GTAW, controlled mode of metal transfer (CMT) during GMAW, and hybrid welding.…”

Section: Ahss Behavior Due To Fusion Weldingmentioning

confidence: 99%

“…Applications with mean currents above the transition current are common, notably in the latest versions of GMAW, which benefit from the pulse mode's arc stability [72]. The key advantages of the P-GMAW method include a large reduction in heat input compared to the spray transfer and an improvement in the rate of weld deposition, which allows for an effective pulse and base parameter selection [66,[72][73][74].…”

Section: Effect Of Welding Process Parametersmentioning

confidence: 99%

Advanced High-Strength Steels for Automotive Applications: Arc and Laser Welding Process, Properties, and Challenges

Perka

John

Kuruveri

et al. 2022

Metals

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In recent years, the demand for advanced high-strength steel (AHSS) has increased to improve the durability and service life of steel structures. The development of these steels involves innovative processing technologies and steel alloy design concepts. Joining these steels is predominantly conducted by following fusion welding techniques, such as gas metal arc welding, tungsten inert gas welding, and laser welding. These fusion welding techniques often lead to a loss of mechanical properties due to the weld thermal cycles in the heat-affected zone (HAZ) and the deposited filler wire chemistry. This review paper elucidates the current studies on the state-of-the-art of weldability on AHSS, with ultimate strength levels above 800 MPa. The effects of alloy designs on the HAZ softening, microstructure evolution, and the mechanical properties of the weld joints corresponding to different welding techniques and filler wire chemistry are discussed. More specifically, the fusion welding techniques used for the welding of AHSS were summarized. This review article gives an insight into the issues while selecting a particular fusion welding technique for the welding of AHSS.

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“…These days, more attention is given to the LBW of HEAs than the EBW and GTAW of HEAs [ 71 , 72 , 73 ]. Parameter optimization in metal arc welding can develop defect-free joints with superior performance at a lower cost than LBW and EBW [ 74 , 75 , 76 , 77 ].…”

Section: Fusion Welding Techniques For Heasmentioning

confidence: 99%

Welding Techniques for High Entropy Alloys: Processes, Properties, Characterization, and Challenges

et al. 2022

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High entropy alloys (HEAs) are the outstanding innovations in materials science and engineering in the early 21st century. HEAs consist of multiple elements with equiatomic or near equiatomic compositions, which exhibit superior mechanical properties, such as wear resistance, fatigue resistance, and corrosion resistance. HEAs are primarily used in structural and functional applications; hence, appropriate welding processes are essential to enhancing the performances and service lives of HEA components. Herein, a comprehensive overview of current state-of-art-of welding techniques for HEAs is elucidated. More specifically, the article discusses the fusion-based welding techniques, such as gas tungsten arc welding (GTAW) and laser beam welding (LBW), and solid-state welding techniques, such as friction stir welding (FSW) and explosive welding (EB), for a broad category of HEAs. In addition, the microstructural features and mechanical properties of HEAs welded using different techniques were explained for a broad spectrum of HEAs. Finally, this review discusses potential challenges in the welding of HEAs.

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Effect of wire feed rate on microstructure development during bead on plate welding of microalloyed steel using P-GMAW

Cited by 4 publications

References 21 publications

Investigation of microstructure, mechanical, and corrosion properties of Inconel 617 joints welded by laser–MIG hybrid welding

Investigation of microstructure, mechanical, and corrosion properties of Inconel 617 joints welded by laser–MIG hybrid welding

Advanced High-Strength Steels for Automotive Applications: Arc and Laser Welding Process, Properties, and Challenges

Welding Techniques for High Entropy Alloys: Processes, Properties, Characterization, and Challenges

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