Investigation of local tensile strength and ductility properties of an X100 submerged arc seam weld

Huda, Nazmul; Gianetto, J. A.; Ding, Yifan; Lazor, Robert; Gerlich, A.P.

doi:10.1016/j.msea.2019.138475

Cited by 18 publications

(9 citation statements)

References 19 publications

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“…Failures were detected in HAZ, averagely 1 mm out of the FZ, even in two-pass welded specimens. It is known that the increasing elongation rate indicates more ductile material [43,44].…”

Section: Ultimate Tensile Test Resultsmentioning

confidence: 99%

The Effect of TIG Welding Parameters and Automatization for Non-Heat Treated Inconel 718 Sheets

2021

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Inconel 718 alloy is widely used in applications that require advanced strength properties especially at high temperature conditions. Combust room walls, exhaust parts, jet tribune blades and gas tribune equipment are the most known using areas. This alloy can be welded with various fusion welding methods, but TIG (Tungsten Inert Gas) welding is preferred since, it provides simply application, mobility and low cost. This study was aimed to clarify that how adjusting the welding parameters and welding automatically can help to achieve promising mechanical properties before heat treatments. The welding experiments were conducted on three different welding current values and attention was paid to provide full penetration for each condition. The results showed that the highest welding current value which did not cause welding defects lead to decrease heat input due to the high transverse speed usage. Moreover, by automatically welding, the heat input was decreased to a minimum level that provided excellent tensile strength and elongation properties. Dendrites turned to cellular from colon. Hazardous zones, such as HAZ and PMZ, narrowed down. The Laves phase ratio and grain size also decreased. Microhardness results confirmed these microstructure observations. The crack observations after tensile tests showed that failures were near HAZ in high-heat input conditions. However, failures were observed in FZ for low-heat input conditions. Additionally, ductile fracture and fracture similar to cleavage mechanisms were observed together due to adjusting the parameters and automatization.

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“…Failures were detected in HAZ, averagely 1 mm out of the FZ, even in two-pass welded specimens. It is known that the increasing elongation rate indicates more ductile material [43,44].…”

Section: Ultimate Tensile Test Resultsmentioning

confidence: 99%

The Effect of TIG Welding Parameters and Automatization for Non-Heat Treated Inconel 718 Sheets

2021

View full text Add to dashboard Cite

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“…On the other hand, mechanical properties can be discussed by considering the effect of nonmetallic inclusions. They also play a critical role in the toughness; hard and brittle inclusions, along with large size, promote crack nucleation and propagation through grain boundary allotriomorphic ferrite [7,11,13]. Therefore, optimum inclusion size and density number, which have good lattice matching with the matrix, stimulate sheaves of heterogeneously AF formation, de ecting and hindering crack propagation and arresting the cracks to maximize the toughness.…”

Section: Tensile and Indentation Hardness Evaluationmentioning

confidence: 99%

“…It is well known that steels' welding relies on the optimum size and number density of nonmetallic inclusions as a potent heterogeneous nucleation site, which promotes acicular ferrite (AF) formation [13][14][15]. The best impact toughness in steels is achieved through AF due to the high angle grain boundaries (HAGB) density and chaotic ne interlocking sheaves microstructure [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Microstructural and mechanical evaluations of SAW by manufactured granular basic bonded Cr, Mo, and Cr–Mo active fluxes on ST37 low carbon steel

Alishavandi

Mohammadmirzaei

Ebadi

et al. 2022

Int J Adv Manuf Technol

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Bead-on-plate submerged arc welding was conducted on St37 steel by manufactured Cr, Mo, and Cr-Mo active basic uxes produced via the unfused bonded method. The base metal heat-affected zone and weld metal (WM) microstructures were identi ed and characterized by optical microscopy and scanning electron microscopy. Then, the ferrite morphologies volume fraction of WMs were measured. Moreover, the chemical analysis of slag and inclusions was evaluated by point scan energydispersive X-ray spectroscopy and extensively discussed. Inclusions number density and size and their effects on the formation of AF were also elaborated. Then, the WMs' longitudinal tensile strength and Vickers hardness were measured.Finally, the Charpy V-notch test was conducted to determine the impact toughness; the fracture surfaces were investigated, as well.

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Section: Introductionmentioning

confidence: 99%

Microstructural and Mechanical Evaluations of SAW By Manufactured Granular Basic Bonded Cr, Mo, and Cr-Mo Active Fluxes on ST37 Low Carbon Steel

Alishavandi

Mohammadmirzaei

Ebadi

et al. 2021

Preprint

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Bead-on-plate submerged arc welding was conducted on St37 steel by manufactured Cr, Mo, and Cr-Mo active basic fluxes produced via the unfused bonded method. The base metal heat-affected zone and weld metal (WM) microstructures were identified and characterized by optical microscopy and scanning electron microscopy. Then, the ferrite morphologies volume fraction of WMs were measured. Moreover, the chemical analysis of slag and inclusions was evaluated by point scan energy-dispersive X-ray spectroscopy and extensively discussed. Inclusions number density and size and their effects on the formation of AF were also elaborated. Then, the WMs’ longitudinal tensile strength and Vickers hardness were measured. Finally, the Charpy V-notch test was conducted to determine the impact toughness; the fracture surfaces were investigated, as well.

show abstract

Investigation of local tensile strength and ductility properties of an X100 submerged arc seam weld

Cited by 18 publications

References 19 publications

The Effect of TIG Welding Parameters and Automatization for Non-Heat Treated Inconel 718 Sheets

The Effect of TIG Welding Parameters and Automatization for Non-Heat Treated Inconel 718 Sheets

Microstructural and mechanical evaluations of SAW by manufactured granular basic bonded Cr, Mo, and Cr–Mo active fluxes on ST37 low carbon steel

Microstructural and Mechanical Evaluations of SAW By Manufactured Granular Basic Bonded Cr, Mo, and Cr-Mo Active Fluxes on ST37 Low Carbon Steel

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