Vibration-assisted dry polishing of fused silica using a fixed-abrasive polisher

Li, Yaguo; Wu, Yongbo; Zhou, Libo; Fujimoto, Masakazu

doi:10.1016/j.ijmachtools.2013.10.005

Cited by 71 publications

(25 citation statements)

References 21 publications

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“…Conventional abrasive blasting and mechanical polishing do not offer an acceptable solution for precision components, which require selective processing [7,8]. Electro chemical polishing and electropolishing have been reviewed by some researchers to improve the surface finish of SLM parts, but were found to have environmental issues [9].…”

Section: Introductionmentioning

confidence: 99%

Laser polishing of selective laser melted components

Marimuthu

Triantaphyllou

Antar

et al. 2015

International Journal of Machine Tools and Manufacture

238

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Citation: MARIMUTHU, S. et al., 2015 AbstractThe shape complexities of aerospace components are continuously increasing, which encourages industries to refine their manufacturing processes. Among such processes, the selective laser melting (SLM) process is becoming an economical and energy efficient alternative to conventional manufacturing processes. However, dependent on the component shape, the high surface roughness observed with SLM parts can affect the surface integrity and geometric tolerances of the manufactured components. To account for this, laser polishing of SLM components is emerging as a viable process to achieve high-quality surfaces. This report details an investigation carried out to understand the basic fundamentals of continuous wave laser polishing of SLM samples. A numerical model, based on a computational fluid dynamic formulation, was used to assist the understanding of melt pool dynamics, which significantly controls the final surface roughness. The investigation identified the input thermal energy as the key parameter that significantly affect the melt pool convection, and essentially controls the surface quality. Minimum meltpool velocity is essential to achieve wider laser polished track width with good surface finish. Experimental results showed a reduction of surface roughness from 10.2μm to 2.4μm after laser polishing with optimised parameters. Strategies to control the surface topology during laser polishing of SLM components are discussed.

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Section: Introductionmentioning

confidence: 99%

Laser polishing of selective laser melted components

Marimuthu

Triantaphyllou

Antar

et al. 2015

International Journal of Machine Tools and Manufacture

238

View full text Add to dashboard Cite

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“…Fused silica optical components are usually finished by various polishing techniques where polishing compound is used to polish out the surface of fused silica with loose abrasive polishing [6][7][8] and/or bound-abrasive polishing [9][10][11]. Although the techniques employed to polish an optics may differ, the mechanism is similar that a polishing layer (Beilby layer) is almost inevitably left on the finished optics [4,5,12].…”

Section: The Influence Of Metallic Contaminationmentioning

confidence: 99%

Producing fused silica optics with high UV-damage resistance to nanosecond pulsed lasers

Wang¹,

Li²,

Yuan³

et al. 2015

Pacific Rim Laser Damage 2015: Optical Materials for High-Power Lasers

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The laser induced damage to optics has been an issue of paramount importance in laser research community. The low damage threshold of fused silica surfaces predominantly restricts the development of high power and high energy systems. This paper is aimed at improving the surface damage threshold of fused silica substrates by researching the effect of mechanical and chemical defects on laser damage: cracks/scratches and metallic impurities. The cracks were found to close, at least in part, after thermal processing and the damage threshold of the indented region was little affected by the thermal processing. In contrast, the cracks were enlarged after chemical etching and the damage threshold was improved slightly. Concerning scratches, the damage threshold can be recovered significantly after different HF-based etching. The metallic contamination can be removed by HF-based etching and acid leaching. The etched surface shows that the damage threshold increased first to ~30J/cm 2 and then decreased with etching time while the damage threshold stabilized at ~30J/cm 2 for leaching >45min. The surface roughness may degrade after etching, from <1nm to 3~5nm RMS, but that is ~1nm after leaching. The leaching may be a potential method for dissolving metallic contaminants on the glass surface in order to get a smooth surface with high damage resistance.

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“…The polishing of AM parts using a conventional method such as abrasive, mechanical, or electro-polishing does not provide an ideal solution because of the lack of dimensional accuracy, especially when selective places require different treatment. Also, electro-polishing has been shown in a number of cases to have a negative impact on the environment [15,16,17,18,19]. There is a similar consideration of the negative effect on the environment during the application of the chemical mechanical polishing technique (CMP), in which chemical and abrasive materials are used [20,21].…”

Section: Introductionmentioning

confidence: 99%

Laser Polishing of Additive Manufactured 316L Stainless Steel Synthesized by Selective Laser Melting

et al. 2019

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One of the established limitations of metal additive manufacturing (AM) methods, such as selective laser melting (SLM), is the resulting rough surface finish. Laser polishing is one method that can be used to achieve an improved surface finish on AM printed parts. This study is focused on the laser surface polishing of AM parts using CO2 laser beam irradiation. Despite the fact that several researchers have investigated the traditional abrasive polishing method, there is still a lack of information reporting on the laser surface polishing of metal parts. In this study, AM 316L stainless steel cylindrical samples were polished using CO2 laser beam irradiation in continuous wave (CW) working mode. Two design of experiment models were developed for the optimization of the input processing parameters by statistical analysis of their effect on the resulting roughness. The processing parameters investigated were the laser beam power, the rotational speed of the sample, the number of laser scan passes, the laser beam focal position, and the percentage overlap of the laser tracks between consecutive passes. The characterization of the measured roughness and the modified layer microstructure was carried out using 3D optical and scanning electron microscopy (SEM). A maximum reduction of the roughness from 10.4 to 2.7 µm was achieved and no significant change in the microstructure phase type and micro-hardness was observed.

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Vibration-assisted dry polishing of fused silica using a fixed-abrasive polisher

Cited by 71 publications

References 21 publications

Laser polishing of selective laser melted components

Laser polishing of selective laser melted components

Producing fused silica optics with high UV-damage resistance to nanosecond pulsed lasers

Laser Polishing of Additive Manufactured 316L Stainless Steel Synthesized by Selective Laser Melting

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