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Recent developments in MQL machining of aeronautical materials:A comparative review

Chinese Journal of Aeronautics 2025年第1期38卷 43-69页

作者： Syed Hammad ALI Yu YAO Bangfu WU Biao ZHAO Wenfeng DING Muhammad JAMIL Ahmar KHAN Asra BAIG Qi LIU Dongdong XU national Key Laboratory of Science and Technology on Helicopter Transmission Nanjing University of Aeronautics and AstronauticsNanjing 210016China Department of mechanical Engineering NED University of Engineering and TechnologyKarachi 75270Pakistan Centre for precision Manufacturing University of StrathclydeGlasgow G11XQUK School of mechanical Engineering Tongji UniversityShanghai 200092China

Minimum quantity lubrication(MQL),as a new sustainable and eco-friendly alternative cooling/lubrication technology that addresses the limitations of dry and wet machining,utilizes a small amount of lubricant or coolant to reduce friction,tool wear,and heat during cutting *** technique has witnessed significant developments in recent years,such as combining MQL with other sustainable techniques to achieve optimum results,using biodegradable lubricants,and innovations in nozzle designs and delivery *** review presents an in-depth analysis of machining characteristics(e.g.,cutting forces,temperature,tool wear,chip morphology and surface integrity,etc.)and sustainability characteristics(e.g.,energy consumption,carbon emissions,processing time,machining cost,etc.)of conventional MQL and hybrid MQL techniques like cryogenic MQL,Ranque-Hilsch vortex tube MQL,nanofluids MQL,hybrid nanofluid MQL and ultrasonic vibration assisted MQL in machining of aeronautical ***,the latest research and developments are analyzed and summarized in the field of MQL,and provide a detailed comparison between each technique,considering advantages,challenges,and limitations in practical *** addition,this review serves as a valuable source for researchers and engineers to optimize machining processes while minimizing environmental impact and operational ***,the potential future aspects of MQL for research and industrial execution are discussed.

关键词： Aerospace materials Minimum Quantity Lubrication(MQL) Cryogenic Nanofluid Grinding Milling Sustainability

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A metallic anti-biofouling surface with a hierarchical topography containing nanostructures on curved micro-riblets

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Microsystems & Nanoengineering 2022年第1期8卷 83-96页

作者： Taekyung Kim Sunmok Kwon Jeehyeon Lee Joon Sang Lee Shinill Kang national center for optically-assisted high precision mechanical systems Yonsei UniversitySeoul 03722Korea School of mechanical Engineering Yonsei University50 Yonsei-roSeodaemun-guSeoul 03722Korea

Metallic surface finishes have been used in the anti-biofouling,but it is very difficult to produce surfaces with hierarchically ordered *** the present study,anti-biofouling metallic surfaces with nanostructures superimposed on curved micro-riblets were produced via top-down *** to the attachment theory,these surfaces feature few attachment points for organisms,the nanostructures prevent the attachment of bacteria and algal zoospores,while the micro-riblets prohibit the settlement of *** oxidation was performed to induce *** forms a hydration layer on the surface,which physically blocks foulant adsorption along with the anti-biofouling *** characterized the surfaces via scanning electron and atomic force microscopy,contact-angle measurement,and wear-resistance *** contact angle of the hierarchical structures was less than 1°.Laboratory settlement assays verified that bacterial attachment was dramatically reduced by the nanostructures and/or the hydration layer,attributable to *** micro-riblets prohibited the settlement of *** 77 days of static immersion in the sea during summer,the metallic surface showed significantly less biofouling compared to a surface painted with an anticorrosive coating.

关键词： Anti-biofouling Superhydrophilic Hierarchical topography Metallic engineered surface Nanoimprinting,static immersion test,field trials

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Massively parallel direct writing of nanoapertures using multi-optical probes and super-resolution near-fields

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Microsystems & Nanoengineering 2022年第5期8卷 257-267页

作者： Changsu Park Soobin Hwang Donghyun Kim Nahyun Won Runjia Han Seonghyeon Jeon Wooyoung Shim Jiseok Lim Chulmin Joo Shinill Kang School of mechanical Engineering Yonsei University50 Yonsei-roSeodaemun-guSeoul 03722Korea national center for optically-assisted high precision mechanical systems Yonsei UniversitySeoul 03722Korea Department of Materials Science and Engineering Yonsei University50 Yonsei-roSeodaemun-guSeoul 03722Korea School of mechanical Engineering Yeungnam University280 Daehak-roGyeongsanGyungbuk 38541South Korea

Laser direct-writing enables micro and nanoscale patterning,and is thus widely used for cutting-edge research and industrial *** nanolithography methods,such as near-field,plasmonic,and scanning-probe lithography,are gaining increasing attention because they enable fabrication of high-resolution nanopatterns that are much smaller than the wavelength of ***,conventional methods are limited by low throughput and scalability,and tend to use electron beams or focused-ion beams to create *** this study,we developed a procedure for massively parallel direct writing of nanoapertures using a multi-optical probe system and superresolution near-fields.A glass micro-Fresnel zone plate array,which is an ultra-precision far-field optical system,was designed and fabricated as the multi-optical probe *** a chalcogenide phase-change material(PCM),multiple layers of Sb_(65)Se_(35) were used to generate the super-resolution near-field effect.A nanoaperture was fabricated through direct laser writing on a large-area(200×200mm^(2))multi-layered PCM.A photoresist nanopattern was fabricated on an 8-inch wafer via near-field nanolithography using the developed nanoaperture and an i-line commercial exposure *** other methods,this technique allows high-throughput large-area nanolithography and overcomes the gap-control issue between the probe array and the patterning surface.

关键词： lithography optical resolution

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HfC–HfO2 modified high/superhigh temperature thermal protection coating for superior hot corrosion resistance and antioxidation performance

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Journal of Advanced Ceramics 2025年第1期14卷 177-191页

作者： Zhiyun Ye Shuqi Wang Shuang Yu Xinrui Zhao Yongchun Zou Guoliang Chen Lei Wen Lina Zhao Guangxi Zhang Yaming Wang Jiahu Ouyang Dechang Jia Yu Zhou State Key Laboratory of precision Welding&Joining of Materials and Structures Harbin Institute of TechnologyHarbin 150001China Institute for Advanced Ceramics Harbin Institute of TechnologyHarbin 150001China Key Laboratory of Advanced Structure-Function Integrated Materials and Green Manufacturing Technology Harbin Institute of TechnologyHarbin 150001China national center for Materials Service Safety University of Science and Technology BeijingBeijing 100083China Xi’an Aerospace Composites Research Institute Academy of Aerospace Propulsion TechnologyXi’an 710025China

With advances in the thrust-weight ratio,the service temperature of gas turbine engines even exceeds 1500℃,which is urgent for the development of high/superhigh-temperature thermal protection systems(TPSs)for long-term *** alloys are increasingly viewed as promising structural materials for high-temperature applications because of their superior high-temperature mechanical strength,but the“pest”catastrophic oxidation greatly restricts their further *** this study,a HfC–HfO2-modified silicide coating was prepared via an innovative method of halide-activated pack cementation(HAPC)combined with liquid-plasma-assisted particle deposition and sintering of niobium alloys,resulting in a composite coating with excellent hot corrosion resistance and high-temperature oxidation *** modified multilayer coating is characterized by the synergistic combination of a dense NbSi2 inner layer and a HfC–HfO2 porous outer layer,resulting in a significant improvement in high-temperature performance compared with that of the single NbSi2 *** corrosion gain of the composite coating is only 13.94 mg·cm−2 after a corrosion time of 200 h at 900℃,and an intact oxide scale surface is observed after oxidation at 1500℃for 500 *** improvement is attributed to the formation of a robust Hf-rich skeleton provided by the deposited HfC–HfO2 layer,which can accelerate the formation of a highly stable corroded layer/oxide *** addition,multiple stress release mechanisms of the composite coating at high temperatures also provide substantial contributions to long-term *** these merits make HfC–HfO2-modified composite coatings on niobium alloys competitive for the development of high/superhigh-temperature thermal protection systems for long-term service.

关键词： thermal protection coating niobium alloys hot corrosion resistance high-temperature oxidation resistance stress releasemechanism

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Recent developments in MQL machining of aeronautical materials: A comparative review

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Chinese Journal of Aeronautics 2025年第1期 48-74页

作者： Syed Hammad ALI Yu YAO Bangfu WU Biao ZHAO Wenfeng DING Muhammad JAMIL Ahmar KHAN Asra BAIG Qi LIU Dongdong XU national Key Laboratory of Science and Technology on Helicopter Transmission Nanjing University of Aeronautics and Astronautics Department of mechanical Engineering NED University of Engineering and Technology Centre for precision Manufacturing University of Strathclyde School of mechanical Engineering Tongji University

Minimum quantity lubrication (MQL), as a new sustainable and eco-friendly alternative cooling/lubrication technology that addresses the limitations of dry and wet machining, utilizes a small amount of lubricant or coolant to reduce friction, tool wear, and heat during cutting *** technique has witnessed significant developments in recent years, such as combining MQL with other sustainable techniques to achieve optimum results, using biodegradable lubricants, and innovations in nozzle designs and delivery methods. This review presents an in-depth analysis of machining characteristics (e.g., cutting forces, temperature, tool wear, chip morphology and surface integrity, etc.) and sustainability characteristics (e.g., energy consumption, carbon emissions, processing time, machining cost, etc.) of conventional MQL and hybrid MQL techniques like cryogenic MQL, Ranque-Hilsch vortex tube MQL, nanofluids MQL, hybrid nanofluid MQL and ultrasonic vibration assisted MQL in machining of aeronautical materials. Subsequently, the latest research and developments are analyzed and summarized in the field of MQL, and provide a detailed comparison between each technique, considering advantages, challenges, and limitations in practical implementation. In addition, this review serves as a valuable source for researchers and engineers to optimize machining processes while minimizing environmental impact and operational costs. Ultimately, the potential future aspects of MQL for research and industrial execution are discussed.

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Effect of ladle outlet geometry on internal porosity in gravity casting automotive brackets: An experimental investigation

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China Foundry 2020年第1期17卷 56-60页

作者： Jaehoon Choi Hoyoung Hwang Shinill Kang School of mechanical Engineering Yonsei University50 Yonsei-roSeodaemun-guSeoul03722Korea Digital Manufacturing Process Group Korea Institute of Industrial Technology113-58Seohaean-roSiheung-siGyeonggi-do15014Korea Industrial Technology Korea University of Science and Technology217Gajeong-roYuseong-guDaejeon34113Korea national center for optically-assisted mechanical systems Yonsei UniversitySeoul03722Korea

This study investigated whether the pouring ladle's outlet shape could reduce the porosity of aluminum alloy casting products and whether it could be applied to mass production of automotive brackets based on computer simulations and *** filling behaviors of the melt were simulated to compare the flow characteristics of the molten metal poured from the conventional ladle and the proposed *** show that for the conventional ladle,the pouring metal is V-shaped,while it is relatively circular and poured at a more constant rate in the proposed *** scans reveal that the proposed ladle reduces the porosity of the cast *** proposed ladle resulted in an average of 30 fewer pores,a 299.56 mm3 smaller average total pore volume,and a 0.041% lower difference in average *** is concludes that the proposed ladle can be used in the gravity casting *** changing the ladle outlet shape can reduce the casting failure rate of massproduced automobile bracket.

关键词： aluminum alloy pouring ladle gravity casting porosity

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EBSD analysis of grain boundary evolution and dynamic recrystallization of Inconel 625 superalloy at various hot spinning feed rates

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Progress in Natural Science:Materials International 2024年第1期34卷 56-65页

作者： Zhanjie Jing Jiangkun Fan Xudong Liu Yuelin Song Zixiao Wang Kai Cao Yuetan Chen Heng Fu Jianing Zhang Jinshan Li State Key Laboratory of Solidification Processing Northwestern Polytechnical University Chongqing Innovation center Northwestern Polytechnical University national&Local Joint Engineering Research center for precision Thermoforming Technology of Advanced Metal Materials

Hot spinning can make the material withstand shear stress, so that the shape of the material has a great change,which is one of the main processing methods of nickel-based alloy plate members. Inconel 625 alloy, which has excellent high temperature mechanical properties and can be used as the main candidate material for aerospace applications, needs further study on its hot spinning deformation behavior and deformation mechanism. In this paper, the effect of feed rate on the microstructure evolution of Inconel 625 superalloy was studied by the electron backscattered diffraction technology. The microstructure with necklace-like structures composed of dynamic recrystallization(DRX) grains was observed after hot spinning. It was found that at the low feed rate, the promotion of DRX degree and grain refinement happened, where the grain size reached the trough of 10.99 μm under a feed rate of 300 mm/min. However, with the further feed rate rising, the degree of DRX was suppressed to a certain extent and grain size increased to 14.26 μm. On balance, the feed rate of 300 mm/min was the most efficient condition for grain refinement. Besides, it was revealed that both discontinuous dynamic recrystallization(DDRX) and continuous dynamic recrystallization(CDRX) occurred during hot spinning. DDRX includes the initial grain boundary nucleation by bulging and the annealing twin boundary assisted nucleation, while the CDRX mechanism is related to the continuous subgrain rotation within the deformed grain. DDRX is the main DRX mechanism.

关键词： Inconel 625 superalloy Hot spinning Grain boundary evolution DRX mechanism

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Material removal mechanisms in ultrasonic vibration-assisted high-efficiency deep grindingγ-TiAl alloy

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Chinese Journal of Aeronautics 2024年第11期37卷 462-476页

作者： Tao CHEN Xiaowei WANG Biao ZHAO Wenfeng DING Mingyue XIONG Jiuhua XU Qi LIU Dongdong XU Yanjun ZHAO Jianhui ZHU national Key Laboratory of Science and Technology on Helicopter Transmission Nanjing University of Aeronautics and AstronauticsNanjing 210016China Centre for precision Manufacturing University of StrathclydeGlasgow G11XJUK School of mechanical Engineering Tongji UniversityShanghai 201804China State Key Laboratory for high Performance Tools Zhengzhou Research Institute for Abrasives and Grinding Co.LTDZhengzhou 450001China

Gamma titanium-aluminum intermetallic compounds(γ-TiAl)have gained considerable attentions in the aerospace industry due to their exceptional thermal resilience and comprehensive attributes,making them a prime example of lightweight and advanced *** address the frequent occurrence of burns and severe tool deterioration during the process of high-efficiency deep grinding(HEDG)onγ-TiAl alloys,ultrasonic vibration-assisted high-efficiency deep grinding(UVHEDG)has been *** indicate that in UVHEDG,the grinding temperature is on average 15.4%lower than HEDG due to the employment of ultrasonic vibrations,enhancing coolant penetration into the grinding area and thus reducing heat ***,UVHEDG possesses superior performance in terms of grinding forces compared to *** the material removal volume(MRV)increases,the tangential grinding force(F_(t))and normal grinding force(F_(n))of UVHEDG increase but to a lesser extent than in HEDG,with an average reduction of16.25%and 14.7%,*** primarily experiences microfracture of grains,whereas HEDG undergoes large-scale wear later in the process due to increased grinding *** surface roughness(R_(a))characteristics of UVHEDG are superior,with the average value of R_(a)decreasing by 46.5%compared to HEDG as MRV *** surface morphology in UVHEDG exhibits enhanced smoothness and a shallower layer of plastic *** chips generated by UVHEDG show a more shear-like shape,with the applied influence of ultrasonic vibration on chip morphology,thereby impacting material removal *** aforementioned findings contribute to enhanced machining efficiency and product quality ofγ-TiAl alloys after employing ultrasonic vibrations into HEDG.

关键词： Ultrasonic vibration-assisted high-efficiency deep grinding Grinding temperature Grinding forces Surface roughness Chip formation

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Research advances of the drift reducing technologies in application of agricultural aviation spraying

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International Journal of Agricultural and Biological Engineering 2021年第5期14卷 1-10页

作者： Shengde Chen Yubin Lan Zhiyan Zhou Xiaoling Deng Juan Wang College of Electronic Engineering South China Agricultural UniversityGuangzhou 510642China national center for International Collaboration Research on precision Agricultural Aviation Pesticides Spraying Technology Guangzhou 510642China College of Engineering South China Agricultural UniversityGuangzhou 510642China mechanical and Electrical Engineering College Hainan UniversityHaikou 570228China

With the gradual deterioration of the ecological environment and the increase in requirements for the quality of modern life,the use of pesticides is bound to develop towards higher pesticide utilization and less environmental pollution,and the low-volume spraying for agricultural aviation operation combined with the Drift Reducing Technologies(DRTs)may be a useful way to achieve this *** on an analysis of the spray drift mechanism and the primary factors influencing aerial spraying,previous research on DRTs in aerial spraying were reviewed and summarized,and it was found that DRTs in aerial spraying can effectively reduce the environmental pollution caused by pesticide drift by reducing the spraying amount of pesticides and improving the control effect of pesticides,included aerial electrostatic spray technology,aerial spray adjuvant,aerial air-assisted spray technology,drift reducing nozzles and aerial variable-rate spray *** according to the analysis of the current research status,some suggestions and countermeasures to reduce droplet drift of agricultural aviation spraying were put forward from the aspects of strengthening the research on DRTs for plant protection Unmanned Aerial Vehicle(UAV)and adopting reasonable DRTs *** is hoped that provide reference and guidance for the enterprises’product improvement and users’practical operation,and play the advantages of precision agricultural aviation spraying fully.

关键词： agricultural aviation spraying pesticide drift DRTs precision agriculture

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Diamond machining of sinusoidal grid surface using fast tool servo system for fabrication of hydrophobic surface

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中国有色金属学会会刊：英文版 2012年第S3期22卷 787-792页

作者： Hong LU Deug-Woo LEE Sang-Min LEE Jeong-Woo PARK Department of Nano Fusion Technology Pusan National University Department of Nano Mechatronics Engineering Pusan National University Department of mechanical Design Engineering Chosun University

Ultra-precision diamond machining with piezoelectric-assisted fast tool servo (FTS) was used to produce various free-form surfaces.A low cost,rapid and large area fabrication of uniform hydrophobic surface at room temperature which transfers the FTS fabricated sinusoidal grid surface to the flat film with UV-moulding process was described.A piezoelectric-assisted FTS with high band width of 2 kHz,travel range up to 16 μm and the compact mechanism structure was designed for the sinusoidal grid surface machining and the dynamic performance testing of FTS was described in *** results indicate that the dimensions of sinusoidal grid change with the variation of the FTS machining *** properties of UV-moulded surface were evaluated,the best contact angle was measured to be 120.5° on the sinusoidal grid surface with profile wavelength of 350 μm and peak-to-valley amplitude of about 16 μm.

关键词： fast tool servo system diamond turning sinusoidal grid surface UV-moulding contact angle

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