Laser and mechanical cutting effects on the cut-edge properties of steel S355N

Bursi, Oreste S.; D'Incau, Mirco; Zanon, Gabriele; Raso, Sergio; Scardi, Paolo

doi:10.1016/j.jcsr.2017.02.012

Cited by 27 publications

(12 citation statements)

References 12 publications

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“…The whole production process of plasma cutting, grinding and sandblasting influences the hardened layer, the residual stress states and the surface quality; see e.g. [28] - [31]. Therefore, the influence of different production parameters should be further studied and optimized.…”

Section: Discussionmentioning

confidence: 99%

Fatigue strength of high-strength steel after shipyard production process of plasma cutting, grinding, and sandblasting

et al. 2018

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This paper investigates experimentally the fatigue strength of high strength steel, which has undergone normal shipyard production process of plasma cutting, grinding and sandblasting. The study includes steels with the yield strength of 355 and 690 MPa. The tested specimens are of dog-bone shape and represent the large-scale situation of a cruise ship balcony opening corner, loaded in shear or tension. The influence of surface roughness, internal inclusions, hardness and residual stress on the fatigue strength are studied and discussed. Compared to the design curve as well as to the untreated surfaces, the results show significantly improved fatigue strength under constant amplitude loading at a load ratio of R = 0.1. However, very flat or even rising slope of the S-N curve indicates variations in the material and surface quality as well as in the residual stress. Surprisingly, internal defects even up to 100 micrometers in size did not decrease the fatigue strength.

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Section: Discussionmentioning

confidence: 99%

Fatigue strength of high-strength steel after shipyard production process of plasma cutting, grinding, and sandblasting

et al. 2018

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“…Fig. (1a) shows the residual stress distribution obtained in a previous experimental campaign [6], where critical values of tensile stress were observed along the laser cutting direction (ϕ=0°), whereas surface stress was compressive along other directions. This aspect is confirmed in the present study and showed in Fig.…”

Section: Analysis Of the Heat Affected Zonementioning

confidence: 96%

“…(1). Residual stresses in the HAZ: a) profile after [6]; b) mean values observed on the cut surface at half thickness; σ 11 and σ 22 are the principal directions, respectively along and perpendicular to the laser cut (cf. ϕ=0° and ϕ=90° in a)); σ 12 is at ϕ=45° from the principal directions.…”

Section: Analysis Of the Heat Affected Zonementioning

confidence: 99%

High-cycle Fatigue Behaviour of S460N Steel Grade Materials and Bolted Joints Processed by Laser Cutting

Zanon¹,

Bursi²,

Scardi³

et al. 2018

TOBCTJ

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Background: Prompted by the EN 1090 standard, an important evolution has been observed in recent years about steel structures execution. Laser cutting is appealing for high machining speed and precision in implementation of details with complex geometry, but requires consideration for the effects of the inherent thermal process. Objective: The present study investigates the correlations between material properties altered by the laser cutting process and behaviour of the material and of structural joints subjected to high-cycle fatigue. Method: High-cycle fatigue tests on material samples and on structural bolted connections were carried out in order to correlate the structural response with material properties. For this purpose, hardness and residual stresses were analysed in depth, from the cutting surface inward and specimens processed using different laser cutting parameters and post-annealing treatments were investigated. Results: High-cycle fatigue tests on material samples and on structural bolted connections, processed by laser cutting, show a favourable fatigue behaviour of S460N steel, despite the high values of hardness on cut surface, in agreement with Eurocode 3 fatigue category FAT160 and FAT90, respectively for base material and drilled holes. Conclusion: Structural bolted connections made of S460N steel cut by laser exhibit a favourable fatigue behaviour. Local hardness is an important indicator, favourably complemented by the residual stress distribution to understand the effects of laser cutting and correlate them with the high-cycle fatigue behaviour.

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“…In the paper a Morn Laser machine was used to cut the samples. This machine is a very performant one and the laser cut has no cracks or supplementary deformation due to the thermal stresses and it has a very high stability of the cutting tool [6,7].…”

Section: Introductionmentioning

confidence: 99%

“…As the erosion advances, the electrode is moved through the dielectric fluid. Recently, servo systems are used, to assure a constant gap voltage, between the material and the wire and to retract the electrode, when a short circuit occurs [5,6,7,8]. A Kingred Wire EDM, controlled by a CNC system, which utilizes brass electrode wire and high frequency impulses, was used.…”

Section: Introductionmentioning

confidence: 99%

Degradation of magnetic properties of non-oriented silicon iron sheets due to different cutting technologies

Paltanea¹,

Păltânea²,

Marin³

et al. 2019

3C Tecnología

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The magnetic properties of non-oriented silicon iron alloys are strongly influenced by the cutting technology. Medium quality electrical steel M800-65A samples were cut through mechanical punching, laser, water jet and electro erosion technologies and were characterized with an industrial Single Strip Tester at the peak magnetic polarizations Jp of 0.5, 1 and 1.5 T, in the frequency range starting from 10 Hz to 200 Hz. The influence of the cutting technology on the energy losses and magnetic permeability was investigated.

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Laser and mechanical cutting effects on the cut-edge properties of steel S355N

Cited by 27 publications

References 12 publications

Fatigue strength of high-strength steel after shipyard production process of plasma cutting, grinding, and sandblasting

Fatigue strength of high-strength steel after shipyard production process of plasma cutting, grinding, and sandblasting

High-cycle Fatigue Behaviour of S460N Steel Grade Materials and Bolted Joints Processed by Laser Cutting

Degradation of magnetic properties of non-oriented silicon iron sheets due to different cutting technologies

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