Macro–Micro Scale Modeling and Simulation of Columnar Grain Evolution During Gas Tungsten Arc Welding of Nickel-Based Alloy GH3039

Chen, Lili; Wei, Yanhong; Qiu, Shufan; Zhao, Wenjin

doi:10.1007/s11661-019-05546-w

Cited by 8 publications

(3 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Chen et al [ 14 , 15 ] added coupling with a level set (LS) formulation to follow the evolving metal/gas boundary during Gas Metal Arc Welding (GMAW) while computing the as-built grain structure resulting from several passes to fill in a chamfer. Similar welding simulations were proposed, using more or less sophisticated description of heat and mass transfer [16][17][18][19] . However, only comparisons of the grain morphology with experimental observations were illustrated and little validation with texture formation, melt pool shape and temperature and fluid velocity fields were conducted.…”

Section: Introductionmentioning

confidence: 99%

Structure and texture simulations in fusion welding processes – comparison with experimental data

Xue

Blanc²,

Soulié³

et al. 2022

Materialia

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Structure and texture simulations in fusion welding processes – comparison with experimental data

Xue

Blanc²,

Soulié³

et al. 2022

Materialia

View full text Add to dashboard Cite

“…The impact of heat input on the metallurgical and mechanical characteristics of alloy GH 3039 weldments were studied by Chen et al (2020) during GTAW process. The microstructure of the weld bead is largely affected by welding heat input, while the change in columnar grain growth is due to change in the temperature gradient direction [13]. Tork and malekan studied the influence of heat input including gas flow rate on quality and porosity formation rate while GTAW of C70600 copper-nickel alloy.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous optimization of weld bead geometry and weld strength during gas tungsten arc welding of Inconel 825 strips using desirability function coupled with grey relational analysis (DF-GRA)

Choudhury

Singh²,

Singh³

et al. 2023

Eng. Res. Express

View full text Add to dashboard Cite

Inconel 825 is a prominent Ni-Fe-Cr based superalloy finds application in aerospace, defense, automotive, nuclear, marine industries. This article investigates ‘weld strength’ and ‘weld bead characteristics’ of Inconel 825 weld specimens welded using the gas tungsten arc welding (GTAW) process. The welding speed (V), welding current (I), gas flow rate (GFR) and arc length (N) are considered as GTAW parameter and their effect has been examined on the weld characteristics. Welding speed and welding current has been identified as the most influential factor on process characteristics; increased welding current combined with lower welding speed enhances the penetration (P) and ultimate tensile strength (UTS) of the weldments. To obtain a favorable parameters setting that satisfies both the criterion simultaneously i.e. maximizing weld strength for optimum weld bead geometry, a hybrid optimization approach employing desirability function coupled with grey relational analysis (DF-GRA) is proposed. Satisfying all the objectives simultaneously, the approach provides an optimum weld parameters setting of (I3−V1−GFR2−N1:120 A−180 mm/min−9 l/min−2 mm) resulting an improvement of 4.15 % in penetration (P), 5.12 % in front width (FW), 19.74 % in front height (FH), 1.29 % in ultimate tensile strength (UTS), and 2.9 % in percentage elongation (%E) on validation. Upon comparison, the algorithm outperforms the optimization results of both DF and GRA approach suggesting its robust nature. Overall, the DF-GRA hybrid approach is found simple and effective that includes the ignored robustness of the desirability approach.

show abstract

“…Competition is important for the solidification process, which has significant impacts on the morphology of the microstructure and the ultimate material properties. Chen et al [14] simulated epitaxial nucleation and competitive growth via a cellular automata model. The temperature gradient was the main factor determining competitive growth.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Solute Concentration Analysis of Epitaxial Growth during Wire and Arc Additive Manufacturing of Aluminum Alloy

et al. 2023

View full text Add to dashboard Cite

Microstructure and solute distribution have a significant impact on the mechanical properties of wire and arc additive manufacturing (WAAM) deposits. In this study, a multiscale model, consisting of a macroscopic finite element (FE) model and a microscopic phase field (PF) model, was used to predict the 2319 Al alloy microstructure evolution with epitaxial growth. Temperature fields, and the corresponding temperature gradient under the selected process parameters, were calculated by the FE model. Based on the results of macroscopic thermal simulation on the WAAM process, a PF model with a misorientation angle was employed to simulate the microstructure and competitive behaviors under the effect of epitaxial growth of grains. The dendrites with high misorientation angles experienced competitive growth and tended to be eliminated in the solidification process. The inclined dendrites are commonly hindered by other grains in front of the dendrite tip. Moreover, the solute enrichment near the solid/liquid interface reduced the driving force of solidification. The inclined angle of dendrites increased with the misorientation angle, and the solute distributions near the interface had similar patterns, but various concentrations, with different misorientation angles. Finally, metallographic experiments were conducted on the WAAM specimen to validate the morphology and size of the dendrites, and electron backscattered diffraction was used to indicate the preferred orientation of grains near the fusion line, proving the existence of epitaxial growth.

show abstract

Macro–Micro Scale Modeling and Simulation of Columnar Grain Evolution During Gas Tungsten Arc Welding of Nickel-Based Alloy GH3039

Cited by 8 publications

References 20 publications

Structure and texture simulations in fusion welding processes – comparison with experimental data

Structure and texture simulations in fusion welding processes – comparison with experimental data

Simultaneous optimization of weld bead geometry and weld strength during gas tungsten arc welding of Inconel 825 strips using desirability function coupled with grey relational analysis (DF-GRA)

Microstructure and Solute Concentration Analysis of Epitaxial Growth during Wire and Arc Additive Manufacturing of Aluminum Alloy

Contact Info

Product

Resources

About