Enhancing load-bearing capacity of martensitic stainless steel resistance spot welds: Microstructural vs. geometrical approaches

Aghajani, Hamidreza; Bahrami, Milad; Pouranvari, Majid

doi:10.1016/j.msea.2024.146508

Materials Science and Engineering: A

2024

DOI: 10.1016/j.msea.2024.146508

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Enhancing load-bearing capacity of martensitic stainless steel resistance spot welds: Microstructural vs. geometrical approaches

Hamidreza Aghajani,

Milad Bahrami,

Majid Pouranvari

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Cited by 4 publications

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Real‐Time Observation of Strain Evolution in Lap Shear Test of BH220 Steel Resistance Spot‐Welded Joints via a Digital Image Correlation Method

Zhao,

Guseinov,

Vdonin

et al. 2024

steel research int.

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This article presents an investigation of the real‐time deformation and strain field changes of baked hardening (BH) 220 steel plate resistance spot welds in the lap tensile shear tests via digital image correlation (DIC) technology. 2D DIC analysis can be used to provide a quantitative assessment of the strain competition between the weld nugget and the surrounding metal. The data obtained from the DIC technique indicate that the shear strain is primarily concentrated in the outer metal of the weld, consistent with a nugget pull‐out failure (PF) mode. In contrast, if the welding parameters are inappropriate, for example, if the welding current is 7.2 kA, the welding time is 10 cycles and the electrode pressure is 0.35 MPa, a significant shear strain appears in the nugget of the BH220 weld. This subsequently causes the weld to fail in an unfavorable interface failure mode in the shear test. Calculations show that if the failure mode is nugget pull‐out, the mean failure strength is 13.5 kN, while the value for interface failure is 6.55 kN. The PF mode is characterized by ductile failure, whereby the material yields and necks through the base material. This failure mode is not associated with the notch region.

show abstract

Real‐Time Observation of Strain Evolution in Lap Shear Test of BH220 Steel Resistance Spot‐Welded Joints via a Digital Image Correlation Method

Zhao,

Guseinov,

Vdonin

et al. 2024

steel research int.

View full text Add to dashboard Cite

show abstract

Understanding interfacial failure mechanisms of advanced high strength automotive steels resistance spot welds under opening-mode loading

Nadimi,

Pouranvari

2025

Engineering Fracture Mechanics

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Wire-arc directed energy deposition of martensitic stainless steel hardfacing alloy: Microstructure and abrasion wear resistance

Khaghani,

Pouranvari

2025

Journal of Materials Research and Technology

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Enhancing load-bearing capacity of martensitic stainless steel resistance spot welds: Microstructural vs. geometrical approaches

Cited by 4 publications

References 47 publications

Real‐Time Observation of Strain Evolution in Lap Shear Test of BH220 Steel Resistance Spot‐Welded Joints via a Digital Image Correlation Method

Real‐Time Observation of Strain Evolution in Lap Shear Test of BH220 Steel Resistance Spot‐Welded Joints via a Digital Image Correlation Method

Understanding interfacial failure mechanisms of advanced high strength automotive steels resistance spot welds under opening-mode loading

Wire-arc directed energy deposition of martensitic stainless steel hardfacing alloy: Microstructure and abrasion wear resistance

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