Effect of laser incidence angle on cut quality of 4mm thick stainless steel sheet using fiber laser

Mullick, Suvradip; Agrawal, Ashutosh; Nath, Ashish Kumar

doi:10.1016/j.optlastec.2016.02.006

Cited by 28 publications

(4 citation statements)

References 17 publications

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“…Whereas the shearing forces exerted by assist uid becomes the dominant mechanism of material removal with increase of cut depth. In general, at this depth the ow becomes uncontrolled, and the removed materials starts deposition on the wall of cut surface this deteriorate the cut surface quality [29]. From Fig.…”

Section: Surface Morphologymentioning

confidence: 96%

An Experimental Study on Oxygen Assisted Plasma Air Cutting of Low Carbon Steel

Petare,

Khan,

Madhukar

2024

Preprint

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Air plasma cutting technology is widely used for cutting complex profiles, geometrics, shapes, and sections in electrically conducting materials at high speed. In this experimental research, oxygen was introduced along with compressed air during plasma air cutting of 10 mm thick C-20 carbon steel plates and their effect on cut surface quality was studied. A total of twenty experiments with compressed air were performed using a full-factorial design of experiments to identify the optimum ranges of process parameters. Further, based on the obtained results from preliminary experiments, twenty experiments were designed using a central composite design (CCD) approach of response surface method (RSM) using compressed air and a mixture of compressed air and oxygen. The cut surface quality was analysed for both conditions in terms of kerf width, dross height, bevel angle, surface roughness, maximum cutting temperature and heat-affected zone (HAZ). A comparative study between compressed air plasma cutting and oxygen assisted compressed air plasma cutting reveals that the addition of oxygen with compressed air improves the arc quality of plasma, which consequently reduced cutting time, kerf width, dross height, and surface roughness of the work materials. The microstructure study of both the cut surfaces reveals that the addition of oxygen with compressed air reduced the length of HAZ significantly compared to compressed air plasma cutting. The outcome of this study would be beneficial for the researcher and engineers working in the area of plasma-assisted cutting of metals.

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Section: Surface Morphologymentioning

confidence: 96%

An Experimental Study on Oxygen Assisted Plasma Air Cutting of Low Carbon Steel

Petare,

Khan,

Madhukar

2024

Preprint

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“…Moreover, the effect of IR radiation absorption on polymer morphology has been observed. In general, the absorption of a material depends on the wavelength of light and laser incidence angle [47]. At normal position (zero inclination angle), the ytterbium laser beam provides a local heating, leading to homogeneous and dense surface in the radiation incidence zone (Figure 2(d)).…”

Section: Infrared Radiation-induced Synthesis and Characterization Ofmentioning

confidence: 99%

PHEMA Hydrogels Obtained by Infrared Radiation for Cartilage Tissue Engineering

Passos

Carvalho

Rodrigues³

et al. 2019

International Journal of Chemical Engineering

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Although the exposure of polymeric materials to radiation is a well-established process, little is known about the relationship between structure and property and the biological behavior of biomaterials obtained by thermal phenomena at 1070 nm wavelength. This study includes results concerning the use of a novel infrared radiation source (ytterbium laser fiber) for the synthesis of poly(2-hydroxyethyl methacrylate) (PHEMA) hydrogel in order to produce medical devices. The materials were obtained by means of free radical polymerization mechanism and evaluated regarding its cross-linking degree, polymer chain mobility, thermal, and mechanical properties. Their potential use as a biomaterial toward cartilage tissue was investigated through incubation with chondrocytes cells culture by dimethylmethylene blue (DMMB) dye and DNA quantification. Differential scanning calorimetry (DSC) results showed that glass transition temperature (Tg) was in the range 103°C–119°C, the maximum degree of swelling was 70.8%, and indentation fluency test presented a strain of 56%–85%. A significant increase of glycosaminoglycans (GAGs) concentration and DNA content in cells cultured with 40 wt% 2-hydroxyethyl methacrylate was observed. Our results showed the suitability of infrared laser fiber in the free radicals formation and in the rapid polymer chain growth, and further cross-linking. The porous material obtained showed improvements concerning cartilage tissue regeneration.

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“…Laser cut high strength steel grades can be used to generate flexible cuts of any geometry and form a clean cut with minimum damage [1]. It is through the use of the correct laser cutting parameters that can result in high-quality cutedges produced across a range of cutting speeds [2].…”

Section: Introductionmentioning

confidence: 99%

“…The dominant process for different laser material processing techniques is as a function of laser energy and workpiece interaction. Here the cutting processes are divided into three classes, involving; (1) heating, (2) melting or (3) vaporizing the workpiece [9]. A significant proportion of heat is concentrated in the molten material and removed from the kerf via the pressurized assist gas [13].…”

Section: Introductionmentioning

confidence: 99%

Finite Element Analysis of Laser Cut Edge Beam Section for High Stress Intensity Structural Assessment

Thomas

2016

J Fail. Anal. and Preven.

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This research has analyzed the stability of laser cut-edges in the location of high stress intensity of a structural beam. The cut-edge characteristic properties formed during laser-cutting processing have been over prolonged periods determined to have beneficial effects on fatigue life. During this study two high strength steel grades S355MC and DP600 have been examined. Optimal fatigue lives were attained by minimizing the laser cutedge surface damage, maintaining the formation of shallow striations and by controlling the near edge microstructural deformations during the cutting process. This was validated using a bespoke component in which was tested under four-point loading in which there is a area of stress concentration forming a localized plastic zone. The importance of this region is critical due to the fact that it is the area that influences the fatigue life of the structure. Predicting the lives to crack initiation was determined through FE analysis which is based on the use of E-N cut-edge fatigue data.

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Effect of laser incidence angle on cut quality of 4mm thick stainless steel sheet using fiber laser

Cited by 28 publications

References 17 publications

An Experimental Study on Oxygen Assisted Plasma Air Cutting of Low Carbon Steel

An Experimental Study on Oxygen Assisted Plasma Air Cutting of Low Carbon Steel

PHEMA Hydrogels Obtained by Infrared Radiation for Cartilage Tissue Engineering

Finite Element Analysis of Laser Cut Edge Beam Section for High Stress Intensity Structural Assessment

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