Effect of welding consumables on shielded metal arc welded ultra high hard armour steel joints

Kumar, S. Naveen; Balasubramanian, V.; Malarvizhi, S.; Rahman, A. Hafeezur; Balaguru, V.

doi:10.1515/jmbm-2022-0002

Cited by 10 publications

(2 citation statements)

References 35 publications

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“…Additionally, Kumar et al 12 reported similar results utilising welding on Armour steel. The addition of chromium stabilises the ferrite phase and effectively slows the onset of the transition temperature.…”

Section: Sem/eds Analysismentioning

confidence: 72%

“…The occurrence of fracture growth may be influenced by the GBP (white phase). 12 The particular weld heat cycle used in the joint manufacturing process affects the production of this phase. The current investigation used austenitic filler wire to compare the GTAW, GMAW, SMAW, and FCAW techniques on an 18 mm thick plate made of armour steel.…”

Section: Introductionmentioning

confidence: 99%

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Arc-welded armour steel: A tailored and comparative study of its microstructure and mechanical properties

Sathish Kumar,

Arivazhagan

2024

Proceedings of the Institution of Mechanical Engineers, Part L:

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The present research aims to investigate and analyse the metallurgical features, including macrostructure, microstructure, scanning electron microscopy with energy-dispersive X-ray spectroscopy, and electron backscatter diffraction. In addition, the mechanical properties of the arc welding specimens, encompassing hardness, tensile properties, and impact toughness at room temperature, were determined. The specimens were joined utilising various welding techniques, including gas tungsten arc welding, gas metal arc welding, shielded metal arc welding, and flux-cored arc welding. According to macrography, the weldments have no porosity, inclusions, or penetration. This confirms the optimal weldment fabrication process parameters. An optical microstructure analysis was conducted on various zones of the weldments. The weld fusion zone's microstructure reveals delta (δ) ferrite within the austenite matrix. A two-phase microstructure of bainite and untempered martensite is observed in the heat-affected zone. Scanning electron microscopy images at higher magnification reveal austenite and partially δ-ferrite phases. Energy-dispersive X-ray spectroscopy analysis showed higher chromium, nickel, manganese, silicon, and molybdenum concentrations on the grain boundary than in the matrix. According to electron backscatter diffraction, the average weld zone grain sizes for gas tungsten arc welding, gas metal arc welding, shielded metal arc welding, and flux-cored arc welding are 21.4, 35.8, 25.8, and 34.3 µm, respectively. In the heat-affected zone, the grain size decreased significantly. The welding region has lower mechanical properties than the heat-affected zone. All specimens produced using different welding processes had no cracking in the weld metal, including the fusion zone and border.

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Section: Sem/eds Analysismentioning

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Arc-welded armour steel: A tailored and comparative study of its microstructure and mechanical properties

Sathish Kumar,

Arivazhagan

2024

Proceedings of the Institution of Mechanical Engineers, Part L:

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Characterization of Fillet Welded Armor Steel Performed by Robotic Gas Metal Arc Welding: Effect of Heat Input on Microstructure and Microhardness

Çoban,

Kaymak,

Gürol

et al. 2023

J. of Materi Eng and Perform

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Effect of water salinity on properties of multipass underwater wet manual metal arc welded joints

2023

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The weldability of steel under the water is limited due to the influence of the environment. Water causes limited visibility, presence of the residual stresses, increasing the cooling rate, and increasing the diffusible hydrogen content in deposited metal, leading to the formation of brittle microstructures in heat-affected zone (HAZ). The paper presents the results of mechanical properties testing of S420G2+M steel welded joints made with covered electrodes in the water with salinity values: 0‰, 7.5‰, and 35‰. The non-destructive tests: ultrasonic (UT) and radiographic (RT), and destructive tests: Vickers HV10 measurements, Charpy impact, and bending and metallographic macro- and microscopic tests were performed. Moreover, the diffusible hydrogen content in deposited metal by the mercury method was measured. It was observed that water salinity has an influence on the stability of the welding arc and the properties of joints. In particular, it was found that increasing the water salinity provides to: decreasing the hardness of HAZ (from 211 HV10 to 193 HV10), increasing the impact strength (from 82.5 to 101.3 J/cm2). Additionally, a slight increase in the diffusible hydrogen content in deposited metal (up to 65 ml/100g) was observed. The number of microcracks in the joints decreased with increasing the water salinity.

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Effect of welding consumables on shielded metal arc welded ultra high hard armour steel joints

Cited by 10 publications

References 35 publications

Arc-welded armour steel: A tailored and comparative study of its microstructure and mechanical properties

Arc-welded armour steel: A tailored and comparative study of its microstructure and mechanical properties

Characterization of Fillet Welded Armor Steel Performed by Robotic Gas Metal Arc Welding: Effect of Heat Input on Microstructure and Microhardness

Effect of water salinity on properties of multipass underwater wet manual metal arc welded joints

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