Pulsed current and dual pulse gas metal arc welding of grade AISI: 310S austenitic stainless steel

Mathivanan, A.; Senthilkumar, A.; Devakumaran, K.

doi:10.1016/j.dt.2015.05.006

Cited by 27 publications

(10 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In the HAZ, the grains appear to be coarser and cellular in structure while the weld region comprises of finer dendritic structure. This finding is consistent with the microstructure observed during the pulsed current and dual pulse gas metal arc welding of AISI 310 austenitic stainless steel (Mathivanan et al, 2015). The finer grains and dendritic structure observed in the weld region is as a result of faster cooling rate as bulk of the heat energy in the weld pool is quickly conducted to the base metals during weld pool solidification.…”

Section: Microstructure Of the Weld Jointssupporting

confidence: 86%

Analysis of the mechanical properties and penetration depth of gas metal arc welding on AISI 304 stainless steel

Abioye

Gbadeyan

Adebiyi

2019

IJMMP

View full text Add to dashboard Cite

The microstructure, penetration depth and mechanical properties of gas metal arc weldments of AISI 304 stainless steel were investigated within a process window. 9 weldments were produced using Taguchi L9 orthogonal array technique. Well bonded, crack-and pore-free weld joints were obtainable at wire feed rate of 66-96 mm/s, voltage of 19-25 V and welding speed of 5.0-9.6 mm/s. The weld joint hardness (305-395 HV) decreased with increasing the heat energy input. However, weld penetration depth (2.67-4.86 mm) increased as the heat energy input increased. Full weld penetration was achieved at heat energy value of 519 J/mm. The ultimate tensile strength (UTS) first increased with increasing the heat energy input until an optimum value of 765 ± 12 MPa was obtained at 519 J/mm after which there was a decline. The weld penetration of the joints is adjudged to play a significant role on the UTS of the weldments.

show abstract

Section: Microstructure Of the Weld Jointssupporting

confidence: 86%

Analysis of the mechanical properties and penetration depth of gas metal arc welding on AISI 304 stainless steel

Abioye

Gbadeyan

Adebiyi

2019

IJMMP

View full text Add to dashboard Cite

show abstract

“…As DP-GMAW method features microstructural refinement, reduced porosity incidence, and improved solidification cracking susceptibility, improvements in mechanical properties are reported in the literature. Mathivanan et al [19,48] found that both yield strength and ultimate tensile strength could be increased by using DP-GMAW during welding of 6061 aluminum alloy and 310S austenitic stainless steel. Wang et al [22] found that ultimate tensile strength could by increased by using DP-GMAW due to reduced porosity incidence.…”

Section: Improved Solidification Cracking Susceptibilitymentioning

confidence: 99%

Perspective on Double Pulsed Gas Metal Arc Welding

Wang

Xue

2017

Applied Sciences

View full text Add to dashboard Cite

Aluminum alloy welding suffers from problems such as solidification cracking and hydrogen-induced porosity, which are sufficiently severe to limit its potential applications. Because mitigated porosity incidence and solidification cracking are observed in aluminum welds using double pulsed gas metal arc welding (DP-GMAW), a comprehensive review of the mechanism is necessary, but absent from the literature. The oscillation of arc force and droplet pressure causes a weld pool stir effect. The expansion and shrinkage of the weld pool cause unusual remelting and resolidification of the previously solidified metal. DP-GMAW has an increased solidification growth rate and cooling rate, compared with conventional pulsed welding at same heat input. Both numerical and experimental results reveal the remarkable concept that refined microstructure in the fusion zone is obtained by using DP-GMAW. The mechanism of microstructural refinement is revealed as a weld pool stir effect and increased cooling rate. Hydrogen bubbles easily float out and then release from the weld pool originated from the weld pool stir effect. Reduced solidification cracking is achieved due to the refined solidification structure that originated from the increased cooling rate. The advantages, evolution process, and future trend of DP-GMAW are discussed.

show abstract

“…As an effective metallic material joining method, double-pulsed gas metal arc welding (DP-GMAW) process has been employed in many industrial areas [1]. This technique was an improvement based on conventional the pulsed GMAW (P-GMAW) process, which has been investigated and reported since 1950s [2]. DP-GMAW process refers to more advantages when compared to the P-GMAW process, such as DP-GMAW process has wider welding current range to adjust, can be applied for all position welding and wider joint gap configuration, also, double pulses can reduce overall heat delivery and improve the joint property, and strongly stir the weld pool and reduce porosity and crack sensitivity [3,4].…”

Section: Introductionmentioning

confidence: 99%

Exploration of Weld Bead Forming Rule during Double-Pulsed GMAW Process Based on Grey Relational Analysis

et al. 2019

View full text Add to dashboard Cite

Weld bead forming rule is very important during double-pulsed gas metal arc welding (DP-GMAW) process, and this process has more advantages than that of conventional arc welding process. This work employed grey rational analysis to explore the weld bead forming rule. Since the latest twinpulse XT DP control process was employed, the parameters adjustment was easier than that of conventional operation. The grey relational analyses between five main process parameters, which were average welding current, welding speed, twin pulse relation, twin pulse frequency together with twin pulse current change in percent, and three key characteristic parameters, which were bead width, bead height and penetration, were conducted to explore the weld bead forming rule. To accurately calculate the grey relational degree, the negative relevancies were transformed to positive ones. According to calculations and corresponding analyses, it can be concluded that the effects of average welding current and welding speed on the weld bead forming and key characteristic parameters of the weld bead were higher than that of other process parameters. Moreover, the relevancies between key characteristic parameters of the weld bead, and process parameters which included twin pulse relation, average welding current and twin pulse current change in percent were positive, while the relevancies between key characteristic parameters and other two process parameters were negative. The work can supply a new method to evaluate the effects of process parameters during the DP-GMAW process on the weld bead forming or other process characteristics, and references for parameters selection and process optimization.

show abstract

Pulsed current and dual pulse gas metal arc welding of grade AISI: 310S austenitic stainless steel

Cited by 27 publications

References 9 publications

Analysis of the mechanical properties and penetration depth of gas metal arc welding on AISI 304 stainless steel

Analysis of the mechanical properties and penetration depth of gas metal arc welding on AISI 304 stainless steel

Perspective on Double Pulsed Gas Metal Arc Welding

Exploration of Weld Bead Forming Rule during Double-Pulsed GMAW Process Based on Grey Relational Analysis

Contact Info

Product

Resources

About