Structure-Mechanical Property Relationship in Hot-Dip Galvanized S355k2+N Steel Plates

Ajimi, Wiem Toumi; Retraint, Delphine; Montay, Guillaume

doi:10.4028/www.scientific.net/amr.996.884

Cited by 1 publication

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References 12 publications

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“…The residual stress was calculated for the outer eta layer by evaluating the distortion of the (101) Debye ring that is the strongest in this crystal lattice. The elastic constants of the eta bulk have been used for stress calculations: E = 75 GPa and ν = 0.30 [ 16 ].…”

Section: Methodsmentioning

confidence: 99%

Influence of the Manufacturing Process on Defects in the Galvanized Coating of High Carbon Steel Wires

Gelfi

Solazzi

Poli³

2017

Materials

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This study is a detailed failure analysis of galvanized high carbon steel wires, which developed coating cracks during the torsion test performed as a quality control at the end of the manufacturing process. Careful visual inspections showed that the cracks are already present in the coating before the torsion test. In order to explain the origin of these cracks, systematic metallographic investigations were performed by means of optical and scanning electron microscope on both the wires and the rods that have been cold drawn to produce the wire. The chemical composition of the galvanized coatings was evaluated by means of energy dispersive spectroscopy. Micro bidimensional X-ray diffraction experiments were also performed to measure the residual stresses in the galvanized coating. The results showed that the failure is related to two main factors: the relatively high content of silicon in the steel and the unsuitable cooling rate of the rods at the exit from the galvanizing bath. The mechanism proposed to explain the origin of the defects was supported by Finite Elements Methods simulations and verified with in-plant tests. The proper countermeasures were then applied and the problem successfully solved.

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Section: Methodsmentioning

confidence: 99%