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Serrated chip formation in machining of difficult to cut metallic materials: a comprehensive review

Critical Reviews in Solid State and Materials sciences 2025年

作者： Zhao, Zejia Liu, Chujun Xu, Bo Wang, Jingwei Yao, Yingxue Yin, Tengfei To, Suet Yang, Yang Institute of Semiconductor Manufacturing Research College of Mechatronics and Control Engineering Shenzhen University Shenzhen China State Key Laboratory of Ultra-precision Machining Technology Department of Industrial and Systems Engineering The Hong Kong Polytechnic University Kowloon Hong Kong Department of Materials Science Shenzhen MSU-BIT University Shenzhen China Shenzhen China

Serrated cutting chips are usually observed in the machining of difficult to cut metallic materials such as titanium alloys, steels, and nickel-based alloys. Understanding the formation mechanism and influencing factors to generate serrated chips is meaningful for improving the machinability of the difficult to cut materials since the formation of serrated chips poses high risks on the vibration of cutting tools and further affects the surface quality of the workpiece. To date, extensive studies have been conducted on the investigation of serrated chip formation in the machining of difficult to cut materials, but there is still a lack of a comprehensive review to clarify the formation mechanism and summarize the factors affecting the serrated chip characteristics. In this review, two commonly used mechanisms, i.e., adiabatic shear band (ASB) theory and periodical crack formation (PCF) theory, are summarized and discussed with respect to theoretical analyses and experimental verifications. Serrated chip formation in different difficult to cut alloys was also systematically reviewed, considering materials inherent properties such as high hardness, poor thermal conductivity, or low fracture toughness. Besides, some critical factors, including cutting speeds, feed rates, cutting tools, external energy sources, humidity, and temperature are highlighted to illustrate their effects on the serrated chip formation. In addition, challenges and perspectives about the serrated chip formation in machining of difficult to cut metallic materials are proposed to give instruction to future research. © 2025 Taylor & Francis Group, LLC.

关键词： Titanium alloys

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CVD diamond processing tools: A review

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Journal of Advanced Research 2024年

作者： Guo, Zhenfei Guo, Bing Zhang, Jufan Wu, Guicheng Zhao, Huan Jia, Jianfei Meng, Qingyu Zhao, Qingliang Centre for Precision Engineering School of Mechatronics Engineering Harbin Institute of Technology Harbin 150001 China Centre of Micro/Nano Manufacturing Technology (MINMT-Dublin) School of Mechanical & Materials Engineering University College Dublin Dublin 4 Ireland Sichuan Aerospace Fenghuo Servo Control Technology Co. Ltd Chengdu 611130 China State Key Laboratory of Intelligent Manufacturing Equipment and Technology School of Mechanical Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China

Background: Since its development in the 1980 s, chemical vapor deposition (CVD) diamond has found wide application in addressing various engineering challenges, owing to its outstanding characteristics, including exceptionally high hardness, excellent thermal conductivity, and remarkable stability. Notably, processing tools utilizing CVD diamond as the working material exhibit substantial potential for application in the field of mechanical manufacturing. Serving as a viable substitute for natural diamond, CVD diamond processing tools not only offer advantages in production costs but also ensure processing performance on par with natural diamonds. This presents a valuable and effective approach for achieving advanced manufacturing with high precision and low production costs. Aim of Review: The research progress of CVD diamond processing tools is comprehensively reviewed from four perspectives, encompassing the CVD process of diamonds, preparation methods, processing applications, and future development directions of CVD diamond processing tools. key Scientific Concepts of Review: The classification and exposition of CVD diamond deposition processes were presented. The fabrication of CVD diamond processing tools was elaborated. The machining applications of CVD diamond processing tools were then reviewed, mainly focusing on cutting and grinding processes, along with the tool wear characteristics. Finally, research challenges pertaining to CVD diamond processing tools were summarized, with insights proposed for future development opportunities and the anticipation of enhanced performance for prospective engineering applications. © 2024

关键词： Coating Cutting tools CVD diamond Grinding and abrasive machining Machinability assessment Thick film

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Investigation of cleaning effect for airport runway lamps by using baking soda powder

Investigation of cleaning effect for airport runway lamps by...

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作者： Yang Zhao Xiaohong Ge Xing Wang Ke'an Yue Yi Chen Jinhuo Wang Key Laboratory of Functional Materials and Application of Fujian Province Xiamen University of Technology Xiamen Engineering and Technology Research Center of High Efficiency and Precision Intelligent Manufacturing School of Materials Science and EngineeringXiamen University of Technology

In order to ensure the bright effect of airport navigation lights,dry powder cleaning technology was adopted in this paper to improve the efficiency of removing sticky dirt on the lamp *** atomization scheme by mixing dry powder with water was designed through deliberately selecting the appropriate injection nozzle structure to reduce impact of powder pollution on the *** simulation analysis and experimental testing showed that the overall cleaning effect and the atomization scheme were feasible,which reduce the dust pollution by more than 90%.

关键词： Investigation of cleaning effect for airport runway lamps by using baking soda powder

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Simultaneous Generation of Quantum Frequency Combs across Distinct Modal Families in a Single Silicon Nitride Whispering Gallery Mode Resonator

arXiv

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arXiv 2024年

作者： Ji, Bo Yang, Yongjun Wu, Tengfei Li, Nianqin He, Guangqiang State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University Shanghai200240 China Science and Technology on Metrology and Calibration Laboratory Changcheng Institute of Metrology Measurement Aviation Industry Corporation of China Beijing100095 China State Key Laboratory of Precision Spectroscopy East China Normal University Shanghai200062 China

Quantum frequency combs (QFCs) are versatile resources for multi-mode entanglement, such as cluster states, crucial for quantum communication and computation. On-chip whispering gallery mode resonators (WGMRs) can generate these states at ultra-low threshold power. This work demonstrates the simultaneous generation of multiple QFCs using a single on-chip silicon nitride WGMR across distinct modal families. It presents a micro-ring resonator with a radius of 240 µm, capable of supporting four modal families within the 130 to 260 THz frequency range for consistency regulation. The results indicate that, by carefully designing the structure of silicon nitride WGMRs, it is possible to generate quantum entangled frequency combs across distinct modal families simultaneously using monochromatic pump light. It is achieved by modulating the pump mode profiles with a spatial light modulator (SLM) or an on-chip inverse-designed mode converter. This approach offers a simple and low-cost method to achieve higher-density entanglement integration on-chip. Copyright © 2024, The Authors. All rights reserved.

关键词： Silicon nitride

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Unconventional Topological Edge States In One-Dimensional Non-Hermitian Gapless Systems Stemming from Nonisolated Hypersurface Singularities

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Physical Review Letters 2025年第20期134卷 206603-206603页

作者： Hongwei Jia Jing Hu Ruo-Yang Zhang Yixin Xiao Dongyang Wang Mudi Wang Shaojie Ma Xiaoping Ouyang Yifei Zhu C. T. Chan Institute of Precision Optical Engineering School of Physics Science and Engineering Tongji University Shanghai 200092 China Department of Physics Hong Kong University of Science and Technology Hong Kong China State Key Laboratory of Materials for Advanced Nuclear Energy School of Materials Science and Engineering Shanghai University Shanghai 200444 China Optoelectronics Research Centre University of Southampton Southampton SO17 1BJ United Kingdom Shanghai Engineering Research Centre of Ultra Precision Optical Manufacturing Department of Optical Science and Engineering School of Information Science and Technology Fudan University Shanghai 200433 China School of Materials Science and Engineering Xiangtan University Xiangtan China Department of Mathematics Southern University of Science and Technology Shenzhen China

Topologically protected edge states have been extensively studied in systems characterized by the topological invariants in band gaps (also called line gaps). In this study, we unveil a whole new form of edge states supported by non-Hermitian systems that transcends the established paradigms of band-gap topology. In contrast to the traditional stable edge states in topological insulators with specific band gaps, the one-dimensional systems we investigate are inherently gapless with the Brillouin zones being mapped to the loops encircling hypersurface singularities in a higher-dimensional space with parity-time symmetry. These hypersurface singularities are nonisolated degeneracies embedded entirely on exceptional surfaces, rendering the energy gaps in our systems inevitably closed at the intersections of the Brillouin zone loop and the exceptional surfaces. Unexpectedly, such gapless systems still afford topologically protected edge states at system boundaries, challenging the conventional understanding based on band gaps. To elucidate the existence of these edge states in the absence of a band-gap-based invariant, we propose a theoretical framework based on eigenframe rotation and deformation that incorporates non-Bloch band theory. Finally, we experimentally demonstrate this new form of topological edge states with nonreciprocal circuits for the first time. Our work extends topological edge states from gapped phases to gapless phases, offering new insights into topological phenomena.

关键词：

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Study on the Influence of Deformation and Temperature on the Properties of High Strength Tungsten Alloy Wire

SSRN

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SSRN 2024年

作者： Cao, Jun Sun, Yongzhen Shen, Xiaoyu Song, Kexing Zhou, Yanjun Cui, Chengqiang School of Mechanical and Power Engineering Henan Polytechnic University Jiaozuo454000 China Zhejiang Tony Electronic Co. Ltd Huzhou313000 China Henan Academy of Sciences Zhengzhou450046 China School of Materials Science and Engineering Henan University of Science and Technology Luoyang471000 China State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment Guangdong University of Technology Guangzhou510006 China

Traditional solid-liquid doping has some defects, such as uneven distribution of rare earth oxides, complicated working procedures and low production efficiency. In this paper, high strength W-1%La2O3 alloy wire was obtained by solid (tungsten powder)-solid (lanthanum oxide) doping, large deformation rotary forging and wire drawing, which solved the disadvantages of traditional tungsten alloy wire processing. The effects of rotary forging and annealing on the microstructure and properties of tungsten alloy were studied, which provided some basis for preparing high strength tungsten alloy wire. The research shows that during the process of rotary forging, the crystal reverts at high temperature (1480~1380°C), and subgrain appears in the material after large deformation, and the structure is uneven, so it needs to be annealed twice (8.9 mm and 5.2mm) before processing. With the increase of annealing temperature, the degree of recrystallization gradually increases and the hardness of tungsten alloy gradually decreases. Wire mainly shows strong filamentary fiber texture, which is brittle fracture at room temperature. When the deformation is increased to 88.4% (wire diameter is 0.8mm), the fracture of the wire is plastically deformed, which shows plasticity at room temperature. © 2024, The Authors. All rights reserved.

关键词： Binary alloys

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Mechanism and manufacturing of 4D printing:derived and beyond the combination of 3D printing and shape memory material

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International Journal of Extreme manufacturing 2024年第6期6卷 332-377页

作者： Pei Feng Feng Yang Jiye Jia Jing Zhang Wei Tan Cijun Shuai State Key Laboratory of Precision Manufacturing for Extreme Service Performance College of Mechanical and Electrical EngineeringCentral South UniversityChangsha 410083People's Republic of China LaTIM INSERM-UMR1101University of BrestBrest 29200France Department of Spine Surgery The Third Xiangya Hospital of Central South UniversityChangsha 410013People's Republic of China Institute of Additive Manufacturing Jiangxi University of Science and TechnologyNanchang 330013People's Republic of China College of Mechanical Engineering Xinjiang UniversityUrumqi 830017People's Republic of China

Four-dimensional(4D)printing is regarded as a methodology that links 3D printing to time,which is characterized by the evolution of predetermined structures or functions for the printed object after applying *** dynamic feature endows 4D printing the potential to be intelligent,attracting wide attention from academia and *** transformation of shape and function is both obtained from the programming of the object endowed by the intrinsic characteristics of the material or by the manufacturing ***,it is necessary to understand 4D printing from the perspective of both mechanism and ***,the state-of-the-art 4D printing polymer was summarized,beginning with the classifications,and leading to the mechanisms,stimulations,and *** links and differences between4D printing polymer and shape memory polymer,between 4D printing and 3D printing were ***,the biomedical applications were outlined and the perspectives were discussed.

关键词： 4D printing mechanism manufacturing biomedical application

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The Influence of Process Parameters on Residual Stress in Mg-Gd-Y-Zn-Z Alloy Fabricated Through Cmt Wire-Arc Additive manufacturing

SSRN

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SSRN 2023年

作者： Zhao, Mingkun Zhao, Zhanyong Du, Wenbo Bai, Peikang Huang, Zhiquan School of Materials Science and Engineering North University of China Taiyuan030051 China Shanxi Key Laboratory of Controlled Metal Solidification and Precision Manufacturing China National Key Laboratory for Remanufacturing Academy of Army Armored Forces China School of Mechanical Engineering Taiyuan University of Science and Technology Taiyuan030602 China

A new heat source combination, consisting of a uniform body heat source and a tilted double ellipsoidal heat source, has been developed for CMT wire-arc additive manufacturing of Mg-Gd-Y-Zn-Zr alloy. Simulations were conducted to analyze the temperature field and residual stress distribution during the process. The optimal combination of feeding speed and welding speed was found to be 8m/min and 8mm/s, respectively, resulting in the lowest thermal accumulation and residual stress. Z-axis residual stress was identified as the main component of residual stress. EBSD testing showed weak texture strength, and KAM analysis revealed that the first layer had the highest residual stress, while the eleventh layer had higher residual stress than the sixth layer. Microhardness in the first, eleventh, and sixth layers varies due to residual stress impacts on dislocation density. Higher residual stress increases dislocation density, raising microhardness in *** experimental results were highly consistent with the simulated results. © 2023, The Authors. All rights reserved.

关键词： Residual stresses

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Study on the Effect of Deformation and Temperature on the Properties of Tungsten Alloy Wires

SSRN

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SSRN 2024年

作者： Cao, Jun Xia, Jie Shen, Xiaoyu Sun, Yongzhen Song, Kexing Zhou, Yanjun Cui, Chengqiang School of Mechanical and Power Engineering Henan Polytechnic University Jiaozuo454000 China Zhejiang Tony Electronic Co. Ltd Huzhou313000 China Henan Academy of Sciences Zhengzhou450046 China School of Materials Science and Engineering Henan University of Science and Technology Luoyang471000 China State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment Guangdong University of Technology Guangzhou510006 China

The effects of deformation and temperature on the organizational properties of W-1% La2O3(W-La) alloy wire were systematically explored using SEM, EDS, EBSD and digital microhardness tester. The results show that during rotary forged processing at 1380°C~1480°C, the W-La alloy crystals underwent a restitution phenomenon, which led to a decrease in energy absorption by the dislocation slip mechanism, which in turn increased the thermal brittleness of the alloys and triggered crystal cracks. After large deformation processing, sub-crystals appeared inside the material, and the organization structure showed inhomogeneity. To improve the organizational structure and properties, annealing treatment was performed at 8.9mm and 5.4mm in diameter. With the increase of annealing temperature, the degree of recrystallization of the alloy increases significantly, and the hardness decreases gradually, reaching 395.3HV and 384.9HV, respectively. In addition, with the increase of deformation, the aspect ratio of the grains of the longitudinal cross-section of 0.8 mm tungsten-lanthanum alloy wires increases, and gradually shows a fibrous organizational structure with a uniformly aligned distribution, and the degree of distortion of the transverse cross-section grains gradually increases, showing a convoluted structure. The texture of the wire mainly shows a strong {110} filamentary fiber structure. Further analysis showed that when the deformation was increased to 81.2%, the wire material exhibited brittle fracture at room temperature, with no obvious plastic deformation;when the deformation was increased to 88.4%, the wire material exhibited plasticity at room temperature, with plastic deformation occurring at the fracture. In conclusion, this study not only reveals the complex effect of deformation amount and temperature on the organization evolution of W-La alloy wire but also provides an essential experimental basis and theoretical guidance for the preparation of high-strength t

关键词： Tungsten alloys

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A Droplet-Driven Micro-Surfboard with Dual Gradients for Programmable Motion

SSRN

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SSRN 2022年

作者： Dai, Ruyuan Li, Guoqiang Xiao, Lin Li, Yaoxia Cui, Zehang Jia, Long Zhou, Maolin Song, Yuegan Yang, Yi Chen, Changfeng Yin, Kai School of Manufacture Science and Engineering Key Laboratory of Testing Technology for Manufacturing Process Ministry of Education Southwest University of Science and Technology Mianyang621010 China Hefei National Laboratory for Physical Sciences at the Microscale CAS Key Laboratory of Mechanical Behavior and Design of Materials Key Laboratory of Precision Scientific Instrumentation of Anhui Higher Education Institutes Department of Precision Machinery and Precision Instrumentation University of Science and Technology of China Hefei230027 China Hunan Key Laboratory of Nanophotonics and Devices School of Physics and Electronics Central South University Changsha410083 China

Self-propelled autonomous devices have great significance in energy, environment, and biomedical engineering, and thus vast achievements have been made in recent years. However, conventional propulsion often requires special chemicals or external energy, which restricts their practical applications due to environmental pollution and energy waste. In this work, inspired by the fast movement of a water strider on the water surface, a novel type of droplet-driven micro-surfboard (DDMS) was developed via femtosecond laser micro/nano fabrication, which can be driven flexibly in a green-propulsion method. The DDMS was composed of a superhydrophobic sheet with superhydrophilic wedgy grooves. The droplet was put on superhydrophilic wedgy grooves to enter the water and form a jet, further propelling the DDMS to move directionally. Also, a type of actuator with three superhydrophilic wedgy grooves was designed successively to achieve turn direction, which completes the programable motion by adding droplets to the three channels. Finally, an actuator with circular water storage area and a symmetrical vane-like rotating device with two superhydrophilic channels were developed, realizing long-distance and rotational motions. This work provides new insights into pollution-free autonomous devices, and reveals the great potential in the field of micromachines and intelligent systems. © 2022, The Authors. All rights reserved.

关键词： Drops

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