Mathematical modelling of metal active gas arc welding

Yamamoto, Takeshi; Ohji, Tatsuki; Miyasaka, Fumikazu; Tsuji, Y.

doi:10.1179/174329313x13789830157429

Cited by 9 publications

(5 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recently several simulation models for GMA have been developed. [10][11][12][13] However, the effect of the metal vapour mixture has not been considered yet.…”

Section: Introductionmentioning

confidence: 99%

Plasma properties of helium gas tungsten arc with metal vapour

Tashiro¹,

Tanaka²,

Nakata³

et al. 2007

Science and Technology of Welding and Joining

View full text Add to dashboard Cite

The energy source characteristics of gas tungsten arc (GTA) strongly depend on the physical property of arc plasma. In welding processes, it has been experimentally confirmed that metal vapour evaporated from a high temperature weld pool drastically changes the property of arc plasma and decreases its temperature. However, the effect of metal vapour on the characteristics of heat flux into a base metal is still not clear owing to the difficulty in experimental studies of arc plasma. In the present paper, the energy source property of helium GTA mixed with metal vapour was numerically analysed. It was found that the intense radiation generated from dense metal vapour decreases heat flux into a base metal and contracts the current density distribution especially near the arc axis.

show abstract

“…Recently several simulation models for GMA have been developed. [10][11][12][13] However, the effect of the metal vapour mixture has not been considered yet.…”

Section: Introductionmentioning

confidence: 99%

Plasma properties of helium gas tungsten arc with metal vapour

Tashiro¹,

Tanaka²,

Nakata³

et al. 2007

Science and Technology of Welding and Joining

View full text Add to dashboard Cite

show abstract

“…A large number of researches on these fields have been involved in the last two decades. [2][3][4][5][6][7][8][9][10] Nowadays, welding with weaving (as shown in Fig. 1) has been widely adopted as a method to obtain wide weld bead and improve welding efficiency.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation on temperature and stress fields of welding with weaving

Hu¹,

Yang²,

Fang³

et al. 2006

Science and Technology of Welding and Joining

View full text Add to dashboard Cite

Although welding with weaving had been widely adopted to improve welding efficiency, the effects of weaving arc on temperature and stress fields were not clearly understood. In the present paper, a conversion of coordinates was implanted in a finite element model to improve the calculation precision and comprehend the characteristic of welding with weaving. Comparing with the results of the welding without weaving, a characteristic with lower peak temperature and wider weld bead was presented during the welding with weaving, and the temperature gradients near the weld pool was steeper. The results also indicated that the transverse residual stress of welding with weaving was greater than that of welding without weaving, while the longitudinal residual stress was similar. Both temperatures and residual stresses were compared with those of the experiments.

show abstract

“…The temperature field was calculated using a quasi-steady heat conduction model and a Cartesian coordinate system moving with the heat source, as shown in Figure 8, where Φ denotes the coordinates of the free-surface profile. The details of the heat conduction model and free-surface model are available in Kim and Na, 14 Yamamoto et al, 15 and Kim et al, 16 and only the modification of the free-surface model is addressed here.…”

Section: Horizontal Weldingmentioning

confidence: 99%

High-deposition-rate position welding of Al 5083 alloy for spherical-type liquefied natural gas tank

Kim

Ahn

Lee

et al. 2015

Proceedings of the Institution of Mechanical Engineers, Part B:

View full text Add to dashboard Cite

High-deposition-rate welding is used in the fabrication of liquefied natural gas tanks from thick aluminium plates because the weld defect generally increases and the productivity decreases with increasing number of passes. In this study, high-deposition-rate gas metal arc welding was implemented in vertical-up and horizontal positions. High deposition was achieved in the vertical-up position by pulse welding using 2.4-mm single wire and 1.6-mm twin wires and in the horizontal position by electromagnetic lifting of the weld pool. The arc stabilities for the applied processes were examined and welding procedures for thick plates were developed. A total of 14 welding passes were required for the vertical-up welding of a 70-mm thick plate by using the conventional 1.6-mm single-wire process, and the fully penetrated welds could be achieved with 8 welding passes by using twin-wire welding. Also, 10 welding passes were required for the horizontal welding of a 35-mm-thick plate by the conventional approach, and 6-pass full-penetration welding was successfully implemented by applying an external electromagnetic field.

show abstract

Mathematical modelling of metal active gas arc welding

Cited by 9 publications

References 6 publications

Plasma properties of helium gas tungsten arc with metal vapour

Plasma properties of helium gas tungsten arc with metal vapour

Numerical simulation on temperature and stress fields of welding with weaving

High-deposition-rate position welding of Al 5083 alloy for spherical-type liquefied natural gas tank

Contact Info

Product

Resources

About