CO2 laser cut quality of Inconel 718 nickel – based superalloy

Hasçalik, Ahmet; Ay, Mustafa

doi:10.1016/j.optlastec.2012.11.003

Cited by 54 publications

(23 citation statements)

References 19 publications

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“…Wet conditions mean that the substrate is fully submerged under water of known water-film thickness above the substrate surface. To keep the underwater setup as simple as possible, the water containing chamber of polymethyl methacrylate (PMMA) was [78] Decrease working time [78] Reductions in vertical and horizontal forces [79] Less stresses in the tools [39] large vibration amplitudes lowers drill life [78] Greater wheel wear (30-60 %) Increase roughness (up to 24 %) [79] Overlapping grit marks [79] [39, [77][78][79][80] Laser / Plasma assisted (Cutting, drilling 30 % reduction in cutting force [37] Compressive residual stresses [38] [ 31,33,37,38,[40][41][42][81][82][83][84] merely placed and clamped on the worktable beneath the incoming laser beam. The associated design in schematic form is shown in Fig.…”

Section: Methodsmentioning

confidence: 99%

“…Therefore, the water-film thickness of 1 mm was chosen for the whole set of experimentation of wet conditions. The total volume law Improved surface roughness 40 % [38,40] Increase in tool life [33,40] No micro-crack during laser surface melting [41] Increase in hardness by laser surface treatment [42] Thicker compressive zone (40 μm to 70 μm) [81] Hardness reduction [33] Heat affected zone [82] Striation formation Micro-cracking Oxide layers [83] Kerf taper Recast layer [84] Residual stresses [42] [8,46,[87][88][89][90] endorsed to decide and calculate the water-film thickness above substrate surface using Eqs. (1), (2), and (3).…”

Section: Methodsmentioning

confidence: 99%

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A comparison of laser beam machining of micro-channels under dry and wet mediums

Darwish

Ahmed

Alahmari

et al. 2015

Int J Adv Manuf Technol

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Micro-channels have been fabricated in nickelbased superalloy (Inconel 718) through laser beam machining (LBM). Two machining mediums are employed: dry and wet medium. Under the dry medium, laser beam passes through air prior to strike with target surface while under wet medium, the laser beam first travels through a layer of distilled water and reaches the substrate after. For both the machining environments, effects of laser power, pulse repetition rate, and laser scan speed on machined channels' width, depth, and taperness are investigated. A comparison of parametric effects on machined channels' profiles has been carried out for the said machining conditions. The results reveal that LBM under distilled water is more productive than LBM under air environment. In one step, wet machining conditions allow to generate a set of two microchannels, and dry conditions generate one micro-channel. Further, to achieve the optimum dimensions of micro-channels, the appropriate level of each of the investigated laser parameter is proposed.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

A comparison of laser beam machining of micro-channels under dry and wet mediums

Darwish

Ahmed

Alahmari

et al. 2015

Int J Adv Manuf Technol

View full text Add to dashboard Cite

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“…However, shaping of hard to machine materials alongside the complex geometries impose some limitations. Difficult to machine materials such as titanium and nickel alloys, superalloys, ceramics and metal matrix composites are not easy to deal with CM processes [1]. Similarly, complex machining characteristics (3-D milling, high aspect drilling, taper free holes, crack free edges etc.)…”

Section: Introductionmentioning

confidence: 99%

Laser Ablation and Laser-Hybrid Ablation Processes: A Review

Ahmed¹,

Darwish²,

Alahmari³

2015

Materials and Manufacturing Processes

101

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Laser beam machining (LBM) has proven its applications and advantages over almost all the range of engineering materials. It offers its competences from macro machining to micro and nano-machining of simple-to-complex shapes. The hybrid approaches in laser ablation have demonstrated much improved results in terms of material removal rate, surface integrity, geometrical tolerances, thermal damage, metallurgical alterations and many more. The flipside of LBM is the existence of universal problems associated with its thermal ablation mechanism. In order to alleviate or reduce the inherent problems of LBM, a massive research has been done during the past decade in order to build a relatively new route of laser-hybrid processes. This paper reviews the research work carried out so far in the area of LBM and its hybrid processes for different materials and shapes. The article also highlights the research gaps and future research directions in the context of laser and laser-hybrid ablation.

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“…The striation frequency is almost independent of power but can be controlled by cutting speed adjustments. The heights of the first region decreases while the second region heights increase by increase in cutting speed irrespective to laser power [43].…”

Section: Laser Beam Milling Of Nickel Alloysmentioning

confidence: 91%

Laser Beam Machining, Laser Beam Hybrid Machining, and Micro-channels Applications and Fabrication Techniques

Darwish

Ahmed

Al‐Ahmari

2016

Advanced Structured Materials

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Laser beam machining (LBM) has proven its applications and advantages over almost all the range of engineering materials. It offers its competences from macro machining to micro and nano-machining of simple-to-complex shapes. The flipside of LBM is the existence of universal problems associated with its thermal ablation mechanism. In order to alleviate or reduce the inherent problems of LBM, a massive research has been done during the past decade and in turn build a relatively new route of laser-hybrid processes. The hybrid approaches in laser ablation have demonstrated much improved results in terms of material removal rate, surface integrity, geometrical tolerances, thermal damage, metallurgical alterations and many more. This chapter reviews the research work carried out so far in the area of LBM and its hybrid processes for different materials and shapes.

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CO2 laser cut quality of Inconel 718 nickel – based superalloy

Cited by 54 publications

References 19 publications

A comparison of laser beam machining of micro-channels under dry and wet mediums

A comparison of laser beam machining of micro-channels under dry and wet mediums

Laser Ablation and Laser-Hybrid Ablation Processes: A Review

Laser Beam Machining, Laser Beam Hybrid Machining, and Micro-channels Applications and Fabrication Techniques

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