Experimental investigation on laser milling of aluminium oxide using a 30W Q-switched Yb:YAG fiber laser

Leone, Claudio; Genna, Silvio; Tagliaferri, Flaviana; Palumbo, Biagio; Dix, Martin

doi:10.1016/j.optlastec.2015.08.005

Cited by 63 publications

(37 citation statements)

References 34 publications

(104 reference statements)

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“…d). Obviously, when, during the process, an excess of energy is released on the materials, that is at too low Ss and Hd, irrespective to the adopted strategy, this kind of laser is able to machine the CFRP, as shown in .…”

Section: Resultsmentioning

confidence: 99%

“…Table 2 shows the detailed characteristics of the laser system. Although this laser source was specifically developed for marking [12,33,34], trimming [35,36], and milling [16][17][18][35][36][37][38][39] different materials, nevertheless, here it was adopted because of the good absorption of carbon fiber at the fundamental wavelength of k 5 1,064 nm, the higher pulse power (up to 20 kW), the possibility to have the maximum power (30 W) at all the frequencies and for the lower power consumption compared to the traditional Nd:YAG laser source (120 W considering only the laser source and the cooling system). The latter characteristic is very important when environment as well as process sustainability are considered [16,40].…”

Section: Equipmentmentioning

confidence: 99%

See 1 more Smart Citation

Increasing adhesive bonding of carbon fiber reinforced thermoplastic matrix by laser surface treatment

Genna

Leone

Ucciardello

et al. 2017

Polymer Engineering & Sci

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In this study, laser surface treatment of CFRP made of PPS thermoplastic matrix by means of Q-switched Yb:YAG fiber laser is investigated with the aim to improve CFRP adhesive bonding. Two set of experimental tests were developed. In the first, laser treatments were executed fixing the average power (Pa) and changing: the pulse power, the scanning speed, the hatch distance, and the scanning strategy. These tests were performed to individuate the laser-material interaction mechanisms and the process window. The treated surfaces were investigated using optical microscopy. It was found that the treatment is able to remove the outer layer of the matrix up to the exposure of underlying reinforcement. However, depending to the released energy, incomplete cleaning or excessive damage may occur. Then, the operating window was experimentally determined. In the second experimental tests, single lap shear tests were performed on samples treated under the most promising process conditions, to verify the laser treatment effectiveness. It was found that the laser treatment, compared to the untreated samples, is able to increase the apparent shear strength up to three times

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Section: Resultsmentioning

confidence: 99%

Section: Equipmentmentioning

confidence: 99%

Increasing adhesive bonding of carbon fiber reinforced thermoplastic matrix by laser surface treatment

Genna

Leone

Ucciardello

et al. 2017

Polymer Engineering & Sci

View full text Add to dashboard Cite

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“…Results showed that the optimal values of Ra and MRR of the produced pockets were 4.1 µm and 0.7 mm 3 /min respectively. Laser milling was also applied by Loen et al [7] for fabricating square pockets (5 × 5 mm 2 ) in Al 2 O 3 . The effects of fiber laser process parameters and scanning strategy on surface roughness (Ra) and MRR were analyzed.…”

Section: Introductionmentioning

confidence: 99%

Rotary Ultrasonic Machining of Alumina Ceramic: An Experimental Investigation of Tool Path and Tool Overlapping

2020

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Pocket milling has been regarded as one of the most widely used operations in machining. The surface quality of the machined pockets is an essential aspect of any engineering and medical applications. In the current study, rotary ultrasonic machining (RUM) was applied for milling micro-pockets on alumina (Al2O3) ceramic. The objective of this research was to analyze the effect of the tool overlapping parameters on the surface roughness, surface morphology and the profiles of the machined pockets. Subsequently, the effect of different tool path strategies was analyzed on the surface quality and the material removal rate (MRR) of the machined pockets. A scanning electron microscope is used for analyzing the tool wear mechanisms. The experimental results provide evidence that the surface roughness, surface morphology and the MRR have been significantly affected by the considered tool overlapping and the tool path strategies. Furthermore, among the selected tool overlapping parameters (5–25%) and the tool path strategies, the best surface roughness (Ra = 0.155 μm and Rt = 1.432 µm) of the machined pockets can be found at 20% of the tool overlapping with a mix of uni-directional and zigzag tool path strategy.

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“…Leone et al [5] carried out an experimental research project to find the process parameters that play a decisive role in laser milling of aluminum oxide Al 2 O 3 using a 30 W Q-switched Yb:YAG fiber laser machine, to explain the way that process parameters affect the interaction between laser beam and material, and to find the result of changing the process parameters on material removal rate and the surface quality. Kochergin et al [6] carried out an experimental study whose main purpose was to examine the correlation between the process parameters of the laser machine and the produced surface micro geometry.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Stainless Steel SAE304 Laser Engraving Cutting Conditions

2018

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Laser machining processes are a new entrant and a rapidly evolving type of non-conventional machining process which allows the machining of complex geometries with high precision, surface quality and productivity in a wide range of materials. Thus, the need for creating a method has emerged that will help the laser machine operator to select the optimal process parameters. In this study an experimental investigation of the effect of the process parameters on the effectiveness of the laser engraving process was held. The examined process parameters were namely the average output power, the repetition rate, and the scanning speed. For this purpose 126 experimental samples, with various combinations of process parameters using a nanosecond Nd:YAG DMG MORI Lasertec 40 laser machine on a SAE 304 stainless steel plate were made. The measured criteria which evaluated the effectiveness of the process were the removed material layer thickness and the material removal rate.

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Experimental investigation on laser milling of aluminium oxide using a 30W Q-switched Yb:YAG fiber laser

Cited by 63 publications

References 34 publications

Increasing adhesive bonding of carbon fiber reinforced thermoplastic matrix by laser surface treatment

Increasing adhesive bonding of carbon fiber reinforced thermoplastic matrix by laser surface treatment

Rotary Ultrasonic Machining of Alumina Ceramic: An Experimental Investigation of Tool Path and Tool Overlapping

Experimental Investigation of Stainless Steel SAE304 Laser Engraving Cutting Conditions

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