Heat affected zones and oxidation marks in fiber laser–oxygen cutting of mild steel

Al-Mashikhi, S.O.; Powell, John; Kaplan, Alexander; Voisey, K.T.

doi:10.2351/1.3614404

Cited by 8 publications

(3 citation statements)

References 9 publications

(8 reference statements)

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“…However, the use of oxygen can involve excessive burning resulting in a large heat affected zone (HAZ). This gas is delivered at relatively low pressures [10].…”

Section: Introductionmentioning

confidence: 99%

Effect of Laser Cutting Parameters on the Heat Affected Zone and on the Boundary Layer in Steel Laser Processing

Aggoune¹,

Abid

Amara³

2020

DDF

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This paper investigates the effect of the laser cutting parameters on the heat-affected zone, and on the boundary layer of stainless steel processing. A new analytical resolution based on the boundary layer theory is used to deduce the interaction effects of the cutting parameters on the above zones. The results revealed that, the laminar nitrogen assist gas has a negligible effect on the HAZ depth but it has a remarkable effect on the molten boundary layer. It is also noticed that the pressure gradient remains very small compared to the interface shearing and the conductive heat losses from the cutting zone towards the substrate is dominant compared to the convective heat losses towards the gas.

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“…However, the use of oxygen can involve excessive burning resulting in a large heat affected zone (HAZ). This gas is delivered at relatively low pressures [10].…”

Section: Introductionmentioning

confidence: 99%

Effect of Laser Cutting Parameters on the Heat Affected Zone and on the Boundary Layer in Steel Laser Processing

Aggoune¹,

Abid

Amara³

2020

DDF

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“…The oxidation marks resulted of the cut corresponding to the localized presence of oxides thin layers upon the material surface that is being cut. These marks are easily seen immediately after the laser cut [9][10]. The size and properties of HAZ are also important due to the potential local degradation resulting in edge fragility.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the microstructural influence by laser cutting velocity

Baracaldo¹,

Camargo²,

Martin-Buitrago³

2020

Sci. tech

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This research evaluates the influence of the CO2 laser cutting velocity in the heat-affected zone in a low- carbon steel. The control of laser cutting parameters is essential to ensure that the properties required in the material have not been affected, and avoid additional grinding processes on the cut surfaces. Morphologic, mechanic and microstructural tests were used to prove the influence of cutting process and its velocity on heat-affected zone. Transformation from ferritic into pearlitic structure and reduction in grain size were analyzed. Also, was evaluated a rise in hardness due to phase transformation. Better cutting conditions were evidenced in samples using a cutting velocity of 80 mm/s because the mean hardness obtained allow infer a good relation of properties and a smaller heat affected zone.

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“…They had also observed that increased oxygen pressure had increased the HAZ. Al-Mashikhi et al [28] had investigated the effect of sheet thickness (1-4 mm) and the cutting speed on surface oxidation and heat affected zone (HAZ) for laser-oxygen cutting of mild steel sheet with a fiber laser. They had found that the HAZ was wider at the bottom of the cut as compared to the top and HAZ had decreased with increase of the cutting speed.…”

Section: Introductionmentioning

confidence: 99%

Artificial intelligence based modeling and optimization of heat affected zone in Nd:YAG laser cutting of duralumin sheet

Norkey

Dubey

Agrawal

2014

Journal of Intelligent &Amp; Fuzzy Systems

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Duralumin is an alloy of aluminium which has some unique properties such as high strength to weight ratio, high resistance to corrosion, light in weight, and more demanding alloy in various sectors such as space craft, marine, chemical industries, construction and automobile. These applications require very precise and complex shapes which may not be obtained with conventional machining. Pulsed Nd:YAG laser cutting may be used to fulfill these objectives by using optimum setting of process parameters. The present research paper has experimentally investigated the modeling and optimization of heat affected zone in the pulsed Nd:YAG laser cutting of Duralumin sheet with the aim to minimize heat affected zone. The quality is improved by the proper control of different process parameters such as gas pressure, pulse width, pulse frequency and scanning speed. Artificial intelligence (AI) algorithms have been used to solve the many engineering problems successfully through development of Genetic Algorithm (GA), Fuzzy Logic (FL) and Artificial Neural Network (ANN) systems. The optimization of heat affected zone has been carried out by using Hybrid Approach of Multiple Regression Analysis (MRA) and GA. In this methodology, the second order regression model has been developed by using MRA with the help of experimental data obtained by L 27 orthogonal array (OA). Further this equation has been used as objective function in GA based optimization. The significant factors have been found with further discussion of their effect on the heat affected zone.

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Heat affected zones and oxidation marks in fiber laser–oxygen cutting of mild steel

Cited by 8 publications

References 9 publications

Effect of Laser Cutting Parameters on the Heat Affected Zone and on the Boundary Layer in Steel Laser Processing

Effect of Laser Cutting Parameters on the Heat Affected Zone and on the Boundary Layer in Steel Laser Processing

Analysis of the microstructural influence by laser cutting velocity

Artificial intelligence based modeling and optimization of heat affected zone in Nd:YAG laser cutting of duralumin sheet

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