Optimization of Process Parameters Using Surface Response Methodology for Laser Welding of Titanium Alloy

Cheepu, Muralimohan; Venkateswarlu, D.; Rao, P. Nageswara; Kumaran, S.; Narayanan, S.

doi:10.4028/www.scientific.net/msf.969.539

Cited by 17 publications

(4 citation statements)

References 29 publications

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“…With the expansion of application areas and increased market demand, the welding requirements for TC4 titanium alloy are growing. However, because of the high activity of titanium alloys, it is highly susceptible to oxidation during the welding process, forming a gas-rich layer, which can increase the welding difficulty [ 2 , 3 , 4 ]. Additionally, the welding of thick-walled titanium alloys is prone to problems such as porosity [ 5 ], cracking [ 6 ], deformation [ 7 , 8 ], and failure to meet performance requirements [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

Comparative Study on Laser Welding Thick-Walled TC4 Titanium Alloy with Flux-Cored Wire and Cable Wire

et al. 2023

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In the welding process of thick-walled titanium alloys, the selection of the wire type is one of the critical factors affecting the welding quality. In this paper, flux-cored and cable wires were used as filler materials in the welding of thick-walled titanium alloys. The macrostructure, microstructure, texture, and grain size of both welded joints were compared by employing an optical microscope (OM), scanning electron microscope (SEM), and transmission electron microscope (TEM), and the tensile and impact properties were also evaluated. The comparison result showed that the fusion zone microstructure of both welded joints was dominated by a basketweave structure composed of interwoven acicular α′ martensite, whereas the microstructure of flux-cored wire welded joints was finer, and the degree of anisotropy was low. The strength of both welded joints was higher than that of the base metal, ensuring that fracture occurred in the base metal area during tension. The Charpy impact energy of the flux-cored wire welded joint was 16.7% higher than that of the cable wire welded joint, indicating that the welded joint obtained with the flux-cored wire performed better in the welding process of thick-walled titanium alloys.

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Section: Introductionmentioning

confidence: 99%

Comparative Study on Laser Welding Thick-Walled TC4 Titanium Alloy with Flux-Cored Wire and Cable Wire

et al. 2023

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“…The bonded joints consist of the formation of precipitates, and the maximum shear strength is obtained at an operating temperature of 1135 °C. 19,20 Based on the consideration of hot cracking, precipitation, and heat input, the studies were found interesting based on GTAW welding results. GTAW welding was extensively investigated using continuous current and pulsed current.…”

Section: Introductionmentioning

confidence: 99%

“…The bonded joints consist of the formation of precipitates, and the maximum shear strength is obtained at an operating temperature of 1135 °C. 19,20…”

Section: Introductionmentioning

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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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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“…Response surface methodology (RSM) is a powerful mathematical tool used to optimize the process parameters in processes such as machining, welding, and casting etc [3][4][5] and also used to develop a mathematical model [6] and it minimize the number of experiments. Muralimohan Cheepu et al [7] developed a mathematical model and optimize the welding process parameters during the laser welding of titanium alloys and compared the obtained results from response surface methodology with experimental results. Shekhar Srivastava and R.K. Garg [8] developed a mathematical model and optimized GMA welding process parameters during the welding of IS2062 via RSM approach .…”

Section: Introductionmentioning

confidence: 99%

Development of mathematical model and optimization of GMA welding parameters of IS 2062 grade A steel weldments

Rizvi

Ali

2021

Frattura Ed Integrità Strutturale

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In this experimental works, the effect of GMA welding process parameters, such as arc voltage, wire feed speed, and gas flow rate on the mechanical quality of IS 2062 structural steel of grade A has been studied. Process parameters play an important role in determining the weld quality. In this research work response surface methodology (RSM) technique via design expert (DOE) 12 version software was applied to determining the weld quality and also to develop a mathematical model that can predict the main effect of the above said parameters on weld quality i.e. toughness and hardness. A set of experiments has been conducted to collect the data using a central composite design and ANOVA was used to predict the impact of welding parameters on toughness and hardness and Comparison also made between the actual result and predicted value and from the result that is clear that toughness and hardness of weldment is significantly affected by arc voltage, wire feed speed, and follow by gas flow rate.

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Optimization of Process Parameters Using Surface Response Methodology for Laser Welding of Titanium Alloy

Cited by 17 publications

References 29 publications

Comparative Study on Laser Welding Thick-Walled TC4 Titanium Alloy with Flux-Cored Wire and Cable Wire

Comparative Study on Laser Welding Thick-Walled TC4 Titanium Alloy with Flux-Cored Wire and Cable Wire

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

Development of mathematical model and optimization of GMA welding parameters of IS 2062 grade A steel weldments

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