Article
Chemistry, Physical
Debajyoti Bhaduri, Tina Ghara, Pavel Penchev, Soumitra Paul, Catalin Pruncu, Stefan Dimov, David Morgan
Summary: A novel LP strategy was proposed to improve the re-melting of aluminium alloys by introducing a thermally insulating ceramic baseplate, resulting in significant reductions in surface roughness and residual stresses. The study highlights the importance of controlling heat dissipation in laser polishing of thermally conductive materials to achieve desired surface integrity properties.
APPLIED SURFACE SCIENCE
(2021)
Review
Optics
Anas Ahmad Siddiqui, Avanish Kumar Dubey
Summary: Laser cladding and surface alloying techniques are employed to improve surface properties of materials, with proper selection of input parameters significantly enhancing their performance. Research in this area has attracted extensive interest due to the development of high power lasers and improved control mechanisms.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Jae-Il Jeong, Jong-Hyoung Kim, Si-Geun Choi, Young Tae Cho, Chan-Kyu Kim, Ho Lee
Summary: This study investigated the bonding of powdered white metal to SCM440 alloy steel using laser cladding method as an alternative to traditional centrifugal casting process. The results showed that the white metal produced by laser cladding had higher hardness, but no significant difference in surface friction characteristics compared to centrifugal casting method.
APPLIED SCIENCES-BASEL
(2021)
Article
Nanoscience & Nanotechnology
Yueyue Wang, Taoyuan Ouyang, Li Meng, Liexin Wu, Wuxia Bai, Shuhuan Zhang, Xiaoyan Zeng
Summary: In this study, laser micro-cladding technology was used to prepare high-temperature Pt thick film sensors. The research systematically investigated the formability, microstructure, sintering mechanism, and electrical properties of the Pt thick films. It was found that the sintering degree and properties of the Pt films were influenced by the laser power density. The study successfully developed Pt thick film temperature sensors with superior performance.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Optics
Qiang Gao, Hao Liu, Peijian Chen, Xinhua Liu, Haifeng Yang, Jingbin Hao
Summary: A novel MoNbTiZr refractory high-entropy alloy coating was synthesized on Ti6Al4V surfaces using laser cladding technique. Mathematical models between laser processing parameters (laser power, powder feeding rate, scanning speed) and dilution, porosity, and microhardness were developed and validated. The results showed that dilution and porosity were negatively correlated due to the difference in melting point between the substrate and the coating. Multi-objective optimization identified the optimal processing parameters for dilution, porosity, and microhardness.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Mengzhao Li, Chao Li, Bingyuan Li, Yicheng Zhou, Long Huang, Ang Cai, Chang Cui, Senao Gao, Guodong Zhang, Bing Yang
Summary: Three kinds of Fe30Co20Cr20Ni20Mo3.5 high entropy alloy coatings were successfully prepared on the surface of a Q235 steel plate using plasma cladding and laser cladding. These coatings exhibited different microstructures, crystal structures, and properties. Among them, the deep laser cladding coating showed the highest microhardness and wear resistance, while the high-speed laser cladding coating exhibited the best corrosion resistance.
Article
Metallurgy & Metallurgical Engineering
Tao Li, Zhong-jun Leng, Xi-tao Wang, Shi-fang Wang, Su-qing Zhang, Yuan-sheng Yang, Ji-xue Zhou
Summary: Electroless copper plating was performed to impart electrical conductivity to the magnesium alloy micro-arc oxidation (MAO) coating. The optimized plating temperature and complexing agent concentration were found to be 60 degrees C and 30 g/L, respectively. The plated specimen achieved a square resistance of 0.03 Omega/ after the third stage, indicating excellent electrical conductivity without significantly reducing its corrosion resistance.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
Article
Materials Science, Coatings & Films
Yuanzhuo Liu, Linjiang Chai, Tao Yang, Chaodan Hu, Chuanmei Wang, Guoqiang Xi
Summary: By employing a pulsed laser, laser cladding was performed on IN718 alloy pre-coated with CrCoNi-TiC/SiC powders and three defect-free coatings were successfully prepared. The addition of TiC and SiC powders generated fine carbides dispersed in the coatings and led to changes in grain and substructure morphologies, resulting in increased hardness and wear resistance.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Optics
Qiaodan Chen, Jun Duan, Wei Xiong, Leimin Deng
Summary: Surfaces with strong anti-reflection properties have great application potential in many fields. A new design for anti-reflection surface structures, inspired by the rainforest, was proposed by constructing micro-forests using laser induced competitive vapor deposition. The micro-forests exhibited excellent anti-reflection performance and could be applied to film and large-scale surfaces, thus broadening their application in various fields.
Article
Materials Science, Multidisciplinary
Shuwen Wang, Yang Chen, Chunxing Gu, Qingyi Sai, Tianyu Lei, John Williams
Summary: Novel antifouling surfaces are fabricated by laser cladding of TC4 and Ni60 mixed materials, and the effects of mixed powder mass ratios and laser cladding parameters on the antifouling performance of the laser clad coatings (LCCs) are investigated. The LCCs with Ni60/TC4 mass ratio of 3/7 exhibit better antifouling performance, and surface energy and surface topography significantly affect the antifouling performance of LCCs. Optimization of the Ni60/TC4 mass ratio and laser cladding parameters is necessary for achieving optimal antifouling performance of LCCs.
Article
Materials Science, Multidisciplinary
Tiankai Li, Haiyang Long, Changming Qiu, Mingming Wang, Dongdong Li, Zhen Dong, Yongliang Gui
Summary: This study establishes the statistical relationship between process parameters and quality of Ni60PTA coating using the response surface method and variance analysis. The experimental results show that the laser power has a dominant influence on the dilution ratio, while the scanning speed has the greatest influence on the ratio of layer width to height and contact angle.
Article
Optics
Zeng Tian, Sihai Luo, Liucheng Zhou, Shuyi ZhangLiang, Xiaofeng Dang, Weifeng He
Summary: The study investigates the effects of micro laser shock peening (micro-LSP) on the microstructure, microhardness, surface topography, and fatigue strength of 2A02 aluminum alloy. The results demonstrate that micro-LSP can greatly enhance fatigue strength, regardless of the increased surface roughness caused by the micro-LSP treatment. This improvement is mainly attributed to the combined contribution of high-density dislocations in the slightly remelted surface layer, precipitate transformation, work hardening layer, and grain refinement induced by micro-LSP treatment.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Engineering, Manufacturing
Mithlesh Kumar Mahto, Adarsh Kumar, Avinash Ravi Raja, Meghanshu Vashista, Mohd Zaheer Khan Yusufzai
Summary: This study successfully coated a 3 mm thick layer of copper on an aluminum substrate using friction stir welding (FSW), and the quality of the clad layer was confirmed through detailed microscopic examination, XRD, and microhardness evaluation. Interestingly, even after three FSW passes, the substrate material did not reach near the top of the clad layer.
CIRP JOURNAL OF MANUFACTURING SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Coatings & Films
Wuyan Yuan, Ruifeng Li, Zhaohui Chen, Jiayang Gu, Yingtao Tian
Summary: The study showed that high-speed laser cladding technology can improve coating preparation efficiency and performance compared to traditional laser cladding. The high-speed laser cladding coatings had thinner thickness, finer microstructure, higher hardness, and better wear and corrosion resistance.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
Melek Genc, Pierre Eloi, Jean-Jacques Blandin, Celine Pascal, Patricia Donnadieu, Frederic De Geuser, Pierre Lhuissier, Christophe Desrayaud, Guilhem Martin
Summary: Adding 2.3 wt% of Zr allows the 6061 Al alloy to be processed by PBF-LB, suppressing hot cracks. This is attributed to grain refinement. However, the addition of Zr significantly affects the microstructure, mechanical properties, and electrical/thermal properties of the modified 6061 alloy. As a result, heat treatments need to be designed to achieve a trade-off between yield strength and thermal conductivity.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Alexander Metel, Yury Melnik, Enver Mustafaev, Ilya Minin, Petr Pivkin
Summary: The method uses a concentrated beam of fast argon atoms to sharpen the cutting edges before coating deposition, reducing the initial radius; then a focused beam of fast argon atoms is generated in gas discharge plasma using a concave grid with negative high voltage for coating deposition.
Article
Materials Science, Multidisciplinary
Sergey N. Grigoriev, Andrey Gusarov, Alexander S. Metel, Tatiana Tarasova, Marina A. Volosova, Anna A. Okunkova, Andrey S. Gusev
Summary: A uniform distribution of power density in a laser beam can reduce overheating and material losses during laser powder bed fusion. Compared to Gaussian and inverse Gaussian distributions, the uniform cylindrical distribution performs better in a narrow temperature range.
Article
Materials Science, Multidisciplinary
Alexander Metel, Marina Volosova, Enver Mustafaev, Yury Melnik, Anton Seleznev, Sergey Grigoriev
Summary: This research aimed to enhance the wear resistance of round cutting plates made with SiAlON dielectric ceramics by depositing wear-resistant coatings. The adhesion of the coatings was improved by removing defective surface layers from the cutting plates. Wear-resistant TiAlN coatings deposited after etching significantly improved the processing stability and increased the wear resistance of the cutting plates by at least 1.7 times.
Article
Materials Science, Multidisciplinary
Alexander S. Metel, Tatiana Tarasova, Andrey Skorobogatov, Pavel Podrabinnik, Yury Melnik, Sergey N. Grigoriev
Summary: The article explores the potential of using laser-directed energy deposition (LDED) additive technology to manufacture bimetallic products as an alternative to the traditional brazing process. Parametric analysis is used to determine the optimal process regimes for different alloy pairs. Comparative studies of the deposited layers and transition layers are conducted, showing that LDED provides improved transition layers and operational properties without the need for a low-melting copper layer. A combined technological process of casting and LDED deposition is developed.
Article
Chemistry, Analytical
Sergey N. Grigoriev, Mikhail P. Kozochkin, Artur N. Porvatov, Sergey V. Fedorov, Alexander P. Malakhinsky, Yury A. Melnik
Summary: Creating monitoring systems for technology processes based on concentrated energy flows is an urgent and challenging task in automated production. These processes involve intensive thermal energy transfer, heating, melting and evaporation or sublimation, ionization, and expansion of substances. They also cause structural and phase rearrangements, local volume changes, chemical reactions, and the propagation of longitudinal and transverse waves. Vibrational energy propagates through the machine's elastic system, allowing for remote vibration detection. Vibration parameters can be used in monitoring systems to prevent negative phenomena during processing and provide insights into process kinetics. In some cases, they are the only source of information about the progress in the processing zone.
Article
Materials Science, Multidisciplinary
Alexander S. Metel, Tatiana Tarasova, Andrey Skorobogatov, Pavel Podrabinnik, Marina Volosova, Sergey N. Grigoriev
Summary: This research focuses on using laser-directed energy deposition (LDED) additive technology combined with conventional casting to obtain bimetallic parts. Molybdenum powder is deposited on a cast steel substrate, aiming to replace the traditional technique of brazing molybdenum with a copper interlayer on low-carbon steel. The study investigates the influence of powder particle morphology on the quality of deposited layers and finds that spherical molybdenum powder PMS-M99.9 enables stable deposition and is suitable for LDED. The LDED parameters for molybdenum are determined, and the microstructure, hardness, and wear resistance properties are analyzed.
Article
Materials Science, Multidisciplinary
Marina A. Volosova, Mikhail M. Stebulyanin, Vladimir D. Gurin, Yury A. Melnik
Summary: The structural heterogeneity and defects formed during diamond grinding have a significant impact on the destruction and reliability of ceramic cutting tools. The condition of the surface layer of the tool, processed by various types of abrasive treatments, affects the quality of coatings and the reliability of the tool. Improving coating development can enhance the performance of ceramic cutting tools.
Article
Materials Science, Multidisciplinary
Sergey N. Grigoriev, Mikhail P. Kozochkin, Artur N. Porvatov, Alexander P. Malakhinsky, Yury A. Melnik
Summary: The purpose of this research is to identify the relationships between acoustic emission signal parameters and important process indicators in electroerosive processing. The article presents the results of studying acoustic emission signals during the processing of hard alloys with a cutting machine, focusing on the period before wire electrode breakage. It was found that changes in acoustic emission parameters can be used to prevent wire breakage and improve the efficiency of electroerosive equipment.
Article
Materials Science, Multidisciplinary
Alexander S. Metel, Marina A. Volosova, Yury A. Melnik, Enver S. Mustafaev, Sergey N. Grigoriev
Summary: Wear-resistant coatings enhance cutting tools' machining abilities and durability. However, it is necessary to remove existing coatings in an environmentally friendly manner for resharpening and recoating purposes. This paper introduces a new method using a beam of fast argon atoms for coating stripping, which successfully removed a 3 & mu;m thick AlTiN coating from a rotating solid carbide end mill within 25 minutes. Furthermore, the cleaned tool's cutting edges were effectively reduced from 10.5 to 3.5 & mu;m through an additional one-hour irradiation, allowing for the redeposition of a 3.5 & mu;m thick AlTiN coating and obtaining a coated end mill with a 7 & mu;m cutting-edge radius.
Article
Chemistry, Analytical
Sergey N. Grigoriev, Mikhail P. Kozochkin, Vladimir D. Gurin, Alexander P. Malakhinsky, Artur N. Porvatov, Yury A. Melnik
Summary: The relationship between the parameters of acoustic emission signals, process quality indicators, and characteristics of discharge pulses in wire electrical discharge machining of heat-resistant alloys were studied. The experimental results were presented as mathematical expressions and graphs, and the issues of crack formation in the modified layer and base materials were discussed.
Article
Materials Science, Multidisciplinary
Marina A. Volosova, Maxim A. Lyakhovetsky, Artem P. Mitrofanov, Yury A. Melnik, Anna A. Okunkova, Sergey V. Fedorov
Summary: The influence of different coatings on wear resistance under abrasion and fretting conditions was investigated on titanium alloy samples. The Cr-Al-Si-N/DLC-Si coating exhibited the best combination of hardness, elastic modulus, and friction coefficient, ensuring maximum wear resistance under a wide range of loads.
Article
Engineering, Multidisciplinary
Sergey Grigoriev, Alexander Metel, Marina Volosova, Yury Melnik, Enver Mustafaev
Summary: In this study, a combined processing method using gas discharge plasma was investigated to improve the quality of parts manufactured by the additive manufacturing method. The combined processing method was able to eliminate porosity and reduce surface roughness of the parts.
Proceedings Paper
Nanoscience & Nanotechnology
Sergey N. Grigoriev, Alexander S. Metel, Yury A. Melnik, Enver S. Mustafaev, Marina A. Volosova
Summary: The research introduces a combined treatment technology which can improve the surface roughness and protection of precision parts through polishing with a beam and depositing protective films in dense plasma in a single technological cycle. The innovative technology has a wide range of technological applications, with a particularly promising area in the processing of optical parts and elements.
NANOENGINEERING: FABRICATION, PROPERTIES, OPTICS, THIN FILMS, AND DEVICES XVIII
(2021)
Review
Engineering, Multidisciplinary
Alexander S. Metel, Sergey N. Grigoriev, Tatiana V. Tarasova, Yury A. Melnik, Marina A. Volosova, Anna A. Okunkova, Pavel A. Podrabinnik, Enver S. Mustafaev
Summary: Additive manufacturing has advanced in providing design freedom and reducing operational time and material volumes, but challenges remain in surface roughness and coatings deposition. Research and technological development are needed to address these issues, and new approaches like gas-discharge plasma processing are being explored for finishing parts obtained by laser additive manufacturing.
