Finite element analysis and experimental investigation of moving heat source model for GMAW deposited mild steel weld bead

Aslam, Mohd; Sahoo, Chinmaya Kumar

doi:10.1177/09544089221087819

Cited by 10 publications

(6 citation statements)

References 30 publications

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“…However, this distribution is not conducive to the formation of a high-quality welded joint. Figure 7c, as demonstrated by Aslam [19], illustrates that the temperature field exhibits a homogeneous distribution of heat production in the thickness direction of the plate when the radius of the movable shaft shoulder is approximately 10% of that of the stir needle's root. In order to examine the correlation between isothermal surfaces and heat generation, a theoretical analysis is conducted on the structure of Group C.…”

Section: 2simulation Analysis Of Heat Generation In Stir Headmentioning

confidence: 75%

Structural Optimization Study of Stationary Shoulder Friction Stir Welding Head with Non-Rigid Support

Jin,

Miao,

et al. 2023

Preprint

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In order to improve the quality and efficiency of repairing the aluminum alloy wagon body of the railroad, a stir friction head structure suitable for welding repair of aluminum alloy wagon body is optimized when adopting stir friction welding technology. By analyzing the relationship between the stir welding friction head structure and the heat generation mechanism, an approximate stir friction head structure without moving shoulder is proposed. By analyzing the heat production model of the stir needle with stationary shaft shoulder, the functional relationship between the heat dissipation and the size of the stir needle and process parameters is determined, and the geometry of the stir needle is optimized. Simulation and experimental results show that when welding repair is performed using this optimized stir needle structure, the temperature field of the weld is uniformly distributed along the thickness direction of the weldment, which is conducive to the formation of good welded joints and welds. Practical application in the field shows that the optimized structure can solve the problems of insufficient top forging force and local stress concentration in the process of non-rigid support while ensuring heat production, greatly improving the success rate of welding, and the tensile strength of the weld seam and other indexes have reached a more satisfactory result; the optimization method used has a certain reference value, and it can be used as a reference for similar researches.

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Section: 2simulation Analysis Of Heat Generation In Stir Headmentioning

confidence: 75%

Structural Optimization Study of Stationary Shoulder Friction Stir Welding Head with Non-Rigid Support

Jin,

Miao,

et al. 2023

Preprint

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“…It was concluded that content of carbon in IS 2062 steel had a significant effect on weldability. Aslam and Sahoo (2022) observed coarse grain structure in HAZ and grain structure with fine columnar nature at penetration and weld bead region. Arunkumar et al.…”

Section: Introductionmentioning

confidence: 96%

The influence of CMT-MAG and MAG welding-processes on microstructure and mechanical behaviour of C-Mn E410 structural-steels

Khajuria,

Misra,

Shiva

2024

IJSI

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PurposeAn experimental investigation for developing structure-property correlations of hot-rolled E410 steels with different carbon contents, i.e. 0.04wt.%C and 0.17wt.%C metal active gas (MAG) and cold metal transfer (CMT)-MAG weldments was undertaken.Design/methodology/approachMechanical properties and microstructure of MAG and CMT-MAG weldments of two E410 steels with varying content of carbon were compared using standardized mechanical testing procedures, and conventional microscopy.Findings0.04wt.%C steel had strained ferritic and cementite sub-structures in blocky shape and large dislocation density, while 0.17wt.%C steel consisted of pearlite and polygonal ductile ferrite. This effected yield strength (YS), and microhardness being larger in 0.04wt.%C steel, %elongation being larger in 0.17wt.%C steel. Weldments of both E410 steels obtained with CMT-MAG performed better than MAG in terms of YS, ultimate tensile strength (UTS), %elongation, and toughness. It was due to low heat input of CMT-MAG that resulted in refinement of weld metal, and subzones of heat affected zone (HAZ).Originality/valueA substantial improvement in YS (∼9%), %elongation (∼38%), and room temperature impact toughness (∼29%) of 0.04wt.%C E410 steel is achieved with CMT-MAG over MAG welding. Almost ∼10, ∼12.5, and ∼16% increment in YS, %elongation, and toughness of 0.17wt.%C E410 steel is observed with CMT-MAG. Relatively low heat input of CMT-MAG leads to development of fine Widmanstätten and acicular ferrite in weld metal and microstructural refinement in HAZ subzones with nearly similar characteristics of base metal.

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“…Conventional welding techniques such as shielded metal arc welding, gas tungsten arc welding, gas metal arc welding (GMAW) and submerged arc welding are widely used for joining the BSK 46 steels. [9][10][11][12][13][14][15][16][17][18] GMAW is preferred over the other arc welding processes because of its cost-effectiveness, higher filling rate, relatively easy to operate and higher productivity. [19][20][21][22][23][24] In GMAW, the arc generated between the workpiece and wire electrode melts the workpiece and produces a permanent joint.…”

Section: Introductionmentioning

confidence: 99%

Investigations on microstructural and mechanical properties of BSK 46 steel weldments

Sivateja

Asati

Vidyarthy

2023

Proceedings of the Institution of Mechanical Engineers, Part E:

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BSK 46 is a low alloy structural steel with excellent mechanical and corrosion properties and is widely used in many applications, including tipper bodies of heavy-duty trucks. Optimizing the welding parameters to reduce defects and improve productivity is critical for the users. The present work addresses optimizing the welding process parameters to improve productivity with adequate weld quality during the pulsed gas metal arc welding (P-GMAW) process. Three BSK 46 weldments (weld-1, weld-2 and weld-3) were fabricated by varying the root gap, root face, filler pass and heat input. The metallographic and mechanical characterization of P-GMAW weldments were done through microstructures, Vickers micro-hardness, transverse tensile strength, Charpy toughness and three-point bend test. Subsequently, a correlation has been developed between the microstructural features and mechanical properties of the weld joints. The hardness was found to be incremental in nature from the base metal to the fusion zone. Maximum hardness of 215.81 ± 10 HV was observed in the weld-3 fusion zone. Tensile test results reveal that weld-3 weldments exhibit a higher tensile strength of 547.48 ± 2 MPa than weld-1 (537.46 ± 7 MPa) and weld-2 (533.67 ± 9 MPa) weldments. Maximum impact toughness of 136.33 ± 14 J was observed in the weld-3 weldments. Post-bend testing showed no cracks on the weld surfaces, indicating defect-free weld joints with good ductility. It is observed that weld-3 showed relatively better mechanical properties than weld-1 and weld-2 in lesser welding time and lower welding cost

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Finite element analysis and experimental investigation of moving heat source model for GMAW deposited mild steel weld bead

Cited by 10 publications

References 30 publications

Structural Optimization Study of Stationary Shoulder Friction Stir Welding Head with Non-Rigid Support

Structural Optimization Study of Stationary Shoulder Friction Stir Welding Head with Non-Rigid Support

The influence of CMT-MAG and MAG welding-processes on microstructure and mechanical behaviour of C-Mn E410 structural-steels

Investigations on microstructural and mechanical properties of BSK 46 steel weldments

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