Laser Drilling of Metallic and Nonmetallic Materials and Quality Assessment

Voisey, K.T.

doi:10.1016/b978-0-08-096532-1.00919-5

Cited by 6 publications

(3 citation statements)

References 103 publications

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“…This ablation mechanism occurs when fluence is high enough for the sample to reach its thermodynamic critical temperature, transforming it from a superheated liquid to a mixture of vapour and droplets (Miotello and Kelly 1995). Instead, the melt droplets being released are likely from the recoil pressure of the expanding plasma overcoming the surface tension of the liquid layer (Voisey 2014). Melt ejection is a much more variable process for removing material than vaporisation and produces large particles (Voisey 2014), which may cause spikes in ICP‐MS signals.…”

Section: Discussionmentioning

confidence: 99%

“…Instead, the melt droplets being released are likely from the recoil pressure of the expanding plasma overcoming the surface tension of the liquid layer (Voisey 2014). Melt ejection is a much more variable process for removing material than vaporisation and produces large particles (Voisey 2014), which may cause spikes in ICP-MS signals. Melt ejection occurred more prominently in Vaq-8-Grt than in the other samples (Figure 3c and d).…”

Section: Grandite Garnetmentioning

confidence: 99%

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Investigation of the Ablation Behaviour of Andradite‐Grossular Garnets and Rutile with Implications for U‐Pb Geochronology

Jenkins

Goemann

Belousov

et al. 2023

Geostandard Geoanalytic Res

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U-Pb dating of andradite-grossular garnet (grandite) and rutile by LA-ICP-MS can be used to constrain various metamorphic, metasomatic and igneous geological processes. In this study, we examine and compare the impact of different analytical conditions (fluence, pulse width, laser beam size and ablation frequency) on the ablation crater morphology, ablation rates, down-hole fractionation and U-Pb ages of grandite and rutile samples of different compositions. The shapes of grandite ablation craters suggest the mineral ablates by classical evaporation with significant melting that cannot be eliminated even at fluences just above the ablation threshold. Grandite garnets with higher andradite proportions have faster ablation rates. The overall low U contents of grandite require using large laser beam sizes to obtain acceptable precision of U-Pb ages. At such conditions and crater depths \ 10 lm, fluences of 2.1 and 3.5 J cm -2 , laser pulse width of 5 ns and 20 ns, and ablation frequencies between 3.5 and 6.5 Hz, obtain similar and reproducible ages when the proportion of grossular is \ 35%. Rutile ablation crater morphology shows evidence of melt splashing and thermal stress cracking. They have significant crater bottom features, which increase in relief with lower fluences and a higher number of laser shots, indicating the features are probably energy-related and making higher fluences, such as 5 J cm -2 , necessary for uniform ablation when using 193 nm excimer lasers. The slow ablation rate at low fluences and then steep increase at around 2.0 J cm -2 suggests a transition in the ablation mechanism from exfoliation to classical vaporisation. Crater bottom features and other ablation behaviour vary between samples, which could be related to their difference in colour. Although the down-hole fractionation patterns of the samples are similar at 5 J cm -2 , the U-Pb ages of some samples vary significantly with different analytical conditions and/or measurement sessions, particularly when using laser beam sizes of 30 lm, suggesting differences in mass bias and more variable ablation behaviour. A laser beam size of at least 60 lm is recommended for reproducible U-Pb dating of rutile.

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Section: Discussionmentioning

confidence: 99%

Section: Grandite Garnetmentioning

confidence: 99%

Investigation of the Ablation Behaviour of Andradite‐Grossular Garnets and Rutile with Implications for U‐Pb Geochronology

Jenkins

Goemann

Belousov

et al. 2023

Geostandard Geoanalytic Res

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“…High-strength and brittle materials are challenging to machine conventionally, however, laser drilling of high-strength superalloys and brittle ceramics is routinely done in the aerospace and microelectronic industries. All classes of materials can be laser drilled [13].…”

Section: Laser Drillingmentioning

confidence: 99%

Laser Ablation of Paint from 2024-T3 Alclad Aluminum - Numerical Simulation and Experimental Characterization

Shah¹

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Removal of paint from substrate material through laser ablation is a very promising and environmentally safe process as compared to chemical stripping and other processes.Potential thermomechanical damage of substrate material subjected to laser paint removal process plays a vital role in deciding the efficacy and the accuracy of a particular laser beam profile to be used. In the present research work, numerical simulation of thermomechanical behavior of substrate material (2024-T3 Alclad aluminum) with paint layer is developed subjected to laser heating with Gaussian (TEM00) and Super-Gaussian (Top-Hat) beam profiles. It was observed that the Gaussian beam profile had the fastest stabilization time but produced higher thermal stresses on the surface of substrate material as compared to the Top-Hat beam profile. Moreover, the effects of various paint stripping processes (laser and chemical stripping) on the fatigue life and failure pattern of the substrate material (2024-T3 Alclad aluminum) were investigated through detailed statistical analysis and scanning electron microscope (SEM) analysis. It was observed that the differences in the mean fatigue life between laser and chemical stripped specimens were statistically insignificant. However, there was a distinct difference between the laser stripped and chemically stripped specimens with regard to final fracture zone. For the laser stripped specimen failure was brittle whereas for the chemically stripped specimens' failure was ductile. In addition, surface roughness and surface microhardness measurement on the stripped surfaces were performed.

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A review on short and ultrashort pulsed laser microdrilling: materials, mechanism, methods, and applications

Deepu,

Jagadesh

2024

J Braz. Soc. Mech. Sci. Eng.

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Laser Drilling of Metallic and Nonmetallic Materials and Quality Assessment

Cited by 6 publications

References 103 publications

Investigation of the Ablation Behaviour of Andradite‐Grossular Garnets and Rutile with Implications for U‐Pb Geochronology

Investigation of the Ablation Behaviour of Andradite‐Grossular Garnets and Rutile with Implications for U‐Pb Geochronology

Laser Ablation of Paint from 2024-T3 Alclad Aluminum - Numerical Simulation and Experimental Characterization

A review on short and ultrashort pulsed laser microdrilling: materials, mechanism, methods, and applications

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