Advances in Laser Materials Processing

Grigoriev, Sergey N.; Волосова, М. А.; Okunkova, Anna A.

doi:10.3390/met12060917

Cited by 8 publications

(3 citation statements)

References 22 publications

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“…Laser material processing technologies are highly important for various industries, due to the rapid expansion of laser applications and the decreasing costs of laser systems (Grigoriev, Volosova, & Okunkova, 2022;Rahman, Haider, & Hashmi, 2014). In industrial contexts, different applications such as drilling, welding and laser cutting (Deepak, R.P, & Saran Sundar, 2023) have developed and achieved common acceptance.…”

Section: Introductionmentioning

confidence: 99%

Renewable Energy Solutions for Commercial Ships

Özbey,

Tıkız

2024

21. Yüzyılda Mühendislikte Çağdaş Araştırma Uygulamaları Üzerine Disiplinler Arası Çalışmalar- VI

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Maritime transportation is a keystone of the global economy, facilitating more than 90% of international trade by a fleet of nearly 90,000 vessels. However, the sector's reliance on fossil fuels brings with it significant environmental challenges, including greenhouse gas emissions, air and water pollution, and impacts on marine ecosystems. To address these issues and increase sustainability, there is a growing trend towards integrating renewable energy sources in the maritime sector. In particular, ocean-going vessels contribute more than 3% of global carbon dioxide emissions, while petroleum-based fuels emit significant amounts of nitrogen oxides and sulphur dioxide. In addition, shipping emissions are a major source of ambient air pollution in coastal areas. Projections indicate a potential 50-250% increase in carbon dioxide emissions from international shipping by 2050 if current trends continue. Renewable energy solutions such as wind, solar and nuclear power offer promising alternatives, with advances in technology increasing their efficiency and affordability. However, the transition to marine renewable energy requires overcoming technological barriers, infrastructure limitations and financial challenges. Despite these barriers, adopting renewable energy sources offers an applicable way to reduce the environmental impacts of shipping and ensure a sustainable future for the industry. This study focuses on renewable energy sources used in commercial ships and discusses alternative solutions such as wind, solar and nuclear energy. Furthermore, by highlighting the potential and advantages of renewable energy sources used on commercial ships, this study can be seen as an important step towards reducing environmental impacts and increasing sustainability in the maritime industry.

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Section: Introductionmentioning

confidence: 99%

Renewable Energy Solutions for Commercial Ships

Özbey,

Tıkız

2024

21. Yüzyılda Mühendislikte Çağdaş Araştırma Uygulamaları Üzerine Disiplinler Arası Çalışmalar- VI

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“…In recent years, laser processing has played an increasingly significant role in improving product quality, labor productivity and production automation, as well as in reducing material consumption and environmental pollution [11,12]. The recent advances in laser technology are reflected in the research [2,13,14].…”

Section: Introductionmentioning

confidence: 99%

Laser Drilling in Alumina Ceramics Using a Combination of Laser Pulses in the Free-Running and Q-Switched Modes

et al. 2023

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The possibility of using a two-pulse laser action consisting of a pulse of the free-running pulse followed by the Q-switched pulse in the processes of laser drilling in alumina ceramics is considered. A diagram of a laser machine for implementing the proposed processing method and the method for determining the energy required to form the through hole and the drilling time are presented. For thermal exposure, pulsed radiation of Nd:YAG of the laser operating in the free-running mode (pulse duration 0.5 ms, energy up to 0.3 J) was used. The Q-switched pulse was generated using a second Nd:YAG laser (pulse duration 25–30 ns, energy up to 0.03 J). The laser radiation was focused on the surface of the material at one point. The time between the start of generation of the first and second lasers varied in the range of 0–1000 μs. The optimal delay time for the start of the generation of the second laser relative to the first was determined experimentally. The obtained results showed that the combination of the free-running pulse and the Q-switched pulse can significantly increase the efficiency of laser machining of ceramics and improve the hole quality. This scheme turned out to be promising for optimizing parameters of the process of laser drilling in thin-sheet alumina ceramics. The obtained results obtained have great potential in the field of precision laser machining of ceramics.

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“…Surface roughness or waviness is a critical parameter as it affects not only the aesthetic appeal but also the functional properties of the final product, such as bonding strength for gluing, coating adherence, and the overall finish quality [1,14]. While its application has been extensively studied in metals and polymers [15], the intricacies of laser cutting wood, as a natural and anisotropic material, presents a unique set of challenges when subjected to laser cutting. Factors such as moisture content, grain direction, and wood species can greatly influence the cutting process, resulting in varying outcomes in terms of cut quality, efficiency, and material behavior.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Surface Irregularities of the Cross-Section of the Wood after CO2 Laser Cutting

Adamčík,

Igaz,

Štefančin

et al. 2023

Materials

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The present paper deals with the analysis of cross-section surface irregularities after CO2 laser cutting. The surface irregularities of beech (Fagus sylvatica L.), oak (Quercus petraea), and spruce (Picea abies L.) wood were quantified by primary profile parameters using a digital microscope. The arithmetic mean height (Pa), used as the basic parameter, was supplemented by amplitude parameters (Pv, Pp, Pz) and the Psm parameter, through which the shape of the irregularity was specified in more detail. A statistically significant change was demonstrated when changing the values of the feed speed and the power of the CO2 laser. The results of this article confirm that the surface irregularities increased with an increasing laser power and decreasing feed rate. The scanned topographic images also provide a more detailed explanation of the measured P-parameters and point out the risks associated with the evaluation of the cross-section with the primary profile.

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Advances in Laser Materials Processing

Abstract: Today, laser processing is becoming more and more relevant due to its fast adaptation to the most critical technological tasks, its ability to provide processing in the most rarefied and aggressive mediums (e [...]

Cited by 8 publications

References 22 publications

Renewable Energy Solutions for Commercial Ships

Renewable Energy Solutions for Commercial Ships

Laser Drilling in Alumina Ceramics Using a Combination of Laser Pulses in the Free-Running and Q-Switched Modes

Evaluation of the Surface Irregularities of the Cross-Section of the Wood after CO2 Laser Cutting

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