On the effect of temperature coefficient of surface tension on shape and geometry of weld beads in hot wire gas tungsten arc welding process

Kannan, Pravin; Muthupandi, V.; Devakumaran, K.

doi:10.1016/j.matpr.2017.11.465

Cited by 9 publications

(6 citation statements)

References 9 publications

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“…The addition of Bi 2 S 3 nanoparticles resulted in the formation of the beadlike structure because of the surface tension of the Bi 2 S 3 nanosticks. 16 The SEM images of the pristine Bi 2 S 3 nanosticks are given in Figure S2. With the increase in weight percent of the Bi 2 S 3 , the elongation of the bead was observed in Figure 2d, g.…”

Section: Resultsmentioning

confidence: 99%

“…Figure c–f displays the SEM micrographs of the nanomembrane upon addition of Bi 2 S 3 nanoparticles with a weight percentage of 0.1,0.2, 0.3, and 0.4 wt %, respectively. The addition of Bi 2 S 3 nanoparticles resulted in the formation of the beadlike structure because of the surface tension of the Bi 2 S 3 nanosticks . The SEM images of the pristine Bi 2 S 3 nanosticks are given in Figure S2.…”

Section: Resultsmentioning

confidence: 99%

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Bi₂S₃/PVDF/Ppy-Based Freestanding, Wearable, Transient Nanomembrane for Ultrasensitive Pressure, Strain, and Temperature Sensing

Veeralingam

Badhulika

2020

ACS Appl. Bio Mater.

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Flexible nanofiber-based composites have been widely explored because of their light weight, high surface area, scalability, and tunable physical and mechanical properties. In this work, we report electrospun 2D-Bi2S3 incorporated PVDF/PPy nanofibers as a versatile platform for ultrasensitive pressure, strain, and temperature sensing. Detailed characterization studies revealed the formation of ultrathin nanofibers and characteristic Raman and IR vibration modes of PPy, 2D-Bi2S3, β-phased PVDF. The fabricated pressure sensor exhibited a sensitivity of 1.51 kPa–1 in the wide linear range of 1–50 kPa and a response time of 0.04 s. The practical ability of pressure sensor was tested by successfully detecting pulse rate of human radial arteries. Further, the BS- PVDF/PPy composite was employed as a strain sensor in the range of 3.1–61.5%, displayed a gauge factor (GF) of 45.45 and a response time of 0.1 s. The wearable sensor was capable of detecting minute changes in hand gestures by recognizing the microstrains applied to the device. The sensing mechanism can be attributed to the excellent piezoelectric property of β- phase PVDF, electron transport property of PPy nanoparticles and tensile strength of the BS nanoparticles embedded in the polymer matrix. When used as a wearable temperature sensor, the versatile device demonstrated a linear range of detection 24- 48 °C with a response time of 0.33 s and Temperature coefficient of resistance (TCR) of −0.1117 °C–1 that can be attributed to the phonon-assisted hoping mechanism. The nanofiber composite dissolved in volatile organic solvent acetone in 5 days with the least impact on the surrounding environment thus making this a promising strategy to develop transient technologies aimed at zero-waste, green electronics.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Bi₂S₃/PVDF/Ppy-Based Freestanding, Wearable, Transient Nanomembrane for Ultrasensitive Pressure, Strain, and Temperature Sensing

Veeralingam

Badhulika

2020

ACS Appl. Bio Mater.

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“…In hot filler wire welding, filler wire is heated electrically by resistance heating with separate power source in case of the TIG welding process. By preheating the filler wire, required heat input from the arc reduces to a great extent and higher deposition rate can be achieved even at lower arc current 6) . Fig.…”

Section: Hot Filler Wirementioning

confidence: 99%

A Review on Twin Tungsten Inert Gas Welding Process Accompanied by Hot Wire Pulsed Power Source

Shah

Agrawal

2019

Journal of Welding and Joining

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Tungsten Inert Gas (TIG) welding process is used in the industry due to its positional suitability, good control over metallurgical and mechanical properties and weld integrity. It makes this process more suitable to weld the root pass in the piping industries. However, there is a remarkable limitation to increase the welding current beyond a certain limit in the conventional TIG welding process due to limited current carrying capacity of a single electrode and higher arc pressure. This limits its productivity. To combat it, Twin TIG (T-TIG) welding process is introduced where the two tungsten electrodes are present in one torch. The two separate and synchronized power sources are connected to the two electrodes. To increase the metal deposition rate, the hot filler wire is used because it reduces the requirement of heat from arc plasma. There is another advancement in the TIG welding process which incorporates pulsed power source assisted welding process to control weld bead geometry, microstructure and to weld dissimilar material. This paper presents the effect of parameters of T-TIG, hot wire, and pulsed current welding processes when performed separately. A novel welding set up is proposed to weld dissimilar material with weld integrity. This paper suggests that when these three techniques are used simultaneously by meticulous studies of their process parameters with automation, an outperformed technique can be evolved which multiples the individual advantages of the three processes.

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“…For austenitic steels, an increase in the heating current and the wire feed rate would improve the metal deposition rate (Padmanaban et al ., 2016). The effect of these process parameters also had an influence on the bead geometry and the major changes in the shape were mainly due to the variation in temperature distribution (Kannan et al ., 2018). Hot wire would produce improved bead profile and also improved production rate in comparison with cold wire (Pai et al ., 2019).…”

Section: Introductionmentioning

confidence: 99%

Predicting hot wire tungsten inert gas welding parameters for joining P91 and 304HCu steel using multi-optimization techniques

Sravan

Rajakumar

Rajagopalan³

et al. 2023

MMMS

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PurposeDissimilar joining of austenitic stainless steels and ferritic steels is a challenging task and has a wide range of applications due to its excellent mechanical and thermal characteristics. They are joined mostly by using conventional modes. In the current investigation, the study and optimization of hot wire TIG welding parameters was carried out.Design/methodology/approachThese parameters will govern the desired characteristics of the joint. Solutions were found out through multi-response optimization by using response surface methodology and single response optimization using particle swarm optimization.FindingsOptimized input welding parameters that were achieved are electrode current 180 amps, wire feed rate 1870 mm/min and hot wire current 98 amps and the optimized UTS is 665.45 MPa. The results from PSO were compared with RSM and the optimized input welding parameters for the electrode current, hot wire current and wire feed rate exhibited maximum ultimate tensile strength which were also confirmed from response and contour plots.Originality/valueSensitivity analysis was also performed to understand the effect of each individual parameters on the response. Microstructure features were evaluated for the joints and was found that the characteristics are within the desired criteria.

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On the effect of temperature coefficient of surface tension on shape and geometry of weld beads in hot wire gas tungsten arc welding process

Cited by 9 publications

References 9 publications

Bi₂S₃/PVDF/Ppy-Based Freestanding, Wearable, Transient Nanomembrane for Ultrasensitive Pressure, Strain, and Temperature Sensing

Bi₂S₃/PVDF/Ppy-Based Freestanding, Wearable, Transient Nanomembrane for Ultrasensitive Pressure, Strain, and Temperature Sensing

A Review on Twin Tungsten Inert Gas Welding Process Accompanied by Hot Wire Pulsed Power Source

Predicting hot wire tungsten inert gas welding parameters for joining P91 and 304HCu steel using multi-optimization techniques

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On the effect of temperature coefficient of surface tension on shape and geometry of weld beads in hot wire gas tungsten arc welding process

Cited by 9 publications

References 9 publications

Bi2S3/PVDF/Ppy-Based Freestanding, Wearable, Transient Nanomembrane for Ultrasensitive Pressure, Strain, and Temperature Sensing

Bi2S3/PVDF/Ppy-Based Freestanding, Wearable, Transient Nanomembrane for Ultrasensitive Pressure, Strain, and Temperature Sensing

A Review on Twin Tungsten Inert Gas Welding Process Accompanied by Hot Wire Pulsed Power Source

Predicting hot wire tungsten inert gas welding parameters for joining P91 and 304HCu steel using multi-optimization techniques

Contact Info

Product

Resources

About

Bi₂S₃/PVDF/Ppy-Based Freestanding, Wearable, Transient Nanomembrane for Ultrasensitive Pressure, Strain, and Temperature Sensing

Bi₂S₃/PVDF/Ppy-Based Freestanding, Wearable, Transient Nanomembrane for Ultrasensitive Pressure, Strain, and Temperature Sensing