3D transient thermal modelling of laser microchannel fabrication in lime-soda glass

Issa, Ahmed; Brabazon, Dermot; Hashmi, M.S.J.

doi:10.1016/j.jmatprotec.2008.06.056

Cited by 24 publications

(15 citation statements)

References 7 publications

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“…The resulted actual interaction time between laser and material surface during processing was decreased as the overlap decreased at constant peak power and PRF. Low PRFs tend to produce high pulse energies which roughened the surface at prolonged exposure to the laser energy [8,9]. This explanation supports the surface roughness decreased with increasing PRF and decreasing residence time.…”

Section: Resultssupporting

confidence: 63%

Designing Pulse Laser Surface Modification of H13 Steel Using Response Surface Method

Aqida¹,

Brabazon²,

Naher³

2011

AIP Conference Proceedings

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Abstract. This paper presents a design of experiment (DOE) for laser surface modification process of AISI H13 tool steel in achieving the maximum hardness and minimum surface roughness at a range of modified layer depth. A Rofin DC-015 diffusion-cooled CO 2 slab laser was used to process AISI H13 tool steel samples. Samples of 10 mm diameter were sectioned to 100 mm length in order to process a predefined circumferential area. The parameters selected for examination were laser peak power, overlap percentage and pulse repetition frequency (PRF). The response surface method with Box-Behnken design approach in Design Expert 7 software was used to design the H13 laser surface modification process. Metallographic study and image analysis were done to measure the modified layer depth. The modified surface roughness was measured using two-dimensional surface profilometer. The correlation of the three laser processing parameters and the modified surface properties was specified by plotting three-dimensional graph. The hardness properties were tested at 981 mN force. From metallographic study, the laser modified surface depth was between 37 µm and 150 µm. The average surface roughness recorded from the 2D profilometry was at a minimum value of 1.8 µm. The maximum hardness achieved was between 728 and 905 HV 0.1 .These findings are significant to modern development of hard coatings for wear resistant applications.

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Section: Resultssupporting

confidence: 63%

Designing Pulse Laser Surface Modification of H13 Steel Using Response Surface Method

Aqida¹,

Brabazon²,

Naher³

2011

AIP Conference Proceedings

Self Cite

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“…These models invariably assume the ablation to be either photochemical or photo-thermal process. Researchers have also studied (Issa et al 2008;Sinkovics et al 2010) a thermal model based on transient heat conduction model, using finite element methods by irradiating CO 2 laser to create micro channels on the surface of soda-lime glass. In photo-thermal process, the deposited energy is converted to heat, leading to thermal decomposition.…”

Section: Different Polymers Used For Industrial Micromachiningmentioning

confidence: 99%

Lasers Based Manufacturing

Joshi¹,

Dixit²

2015

Topics in Mining, Metallurgy and Materials Engineering

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“…2 gives the 3dimensional temperature distribution in glazed surface which was solved from the general heat conduction equation, previously presented by Issa et. al [22]. By taking into account the surface preparation, a 60 % surface absorbance factor was used.…”

Section: Methodsmentioning

confidence: 99%

Thermal Simulation of Laser Surface Modification of H13 Die Steel

Aqida

Naher

Brabazon

2012

KEM

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Abstract. In this study, the effects of laser parameters on the properties of glazed die steel were investigated. A Rofin DC-015 diffusion-cooled CO 2 slab laser with 10.6 µm wavelength was used. Die steel sample surfaces were prepared with a 3 µm roughness and chemically treated to improve CO 2 laser wavelength absorbance. One set of processing parameters were processed through the thermal simulation program and correlated with physical results determined from actual test samples. Set processing parameters were 1138 W peak power, 2900 Hz PRF, 24% duty cycle and 261 mm/s traverse speed. Scanning Electron Microscopy (SEM) micrographs and micro-hardness properties of the affected surface were measured. An analytical mathematical model of the heat field generated in the laser glazing process was used to predict the nominal temperature distribution in the surface and dimensions of melt pool. A thermal model using point source surface energy inputs was used to predict the thermal profiles in the die steel. This allowed estimation of the depths of microstructurally altered regions. For higher energy absorbance, the depth of the glazed surface increased from 20 µm to 40 µm. At high nominal heating to cooling rate ratios, high micro-hardness values were recorded.

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3D transient thermal modelling of laser microchannel fabrication in lime-soda glass

Cited by 24 publications

References 7 publications

Designing Pulse Laser Surface Modification of H13 Steel Using Response Surface Method

Designing Pulse Laser Surface Modification of H13 Steel Using Response Surface Method

Lasers Based Manufacturing

Thermal Simulation of Laser Surface Modification of H13 Die Steel

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