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Analysis of tool wear in micromilling Ti6Al4V and its impact on generated surface integrity

Wear 2025年 570卷

作者： Gonçalves, Maria Clara Coimbra Alsters, rob Curtis, david Bushlya, Volodymyr M'Saoubi, rachid Ghadbeigi, Hassan University of Sheffield Mechanical Engineering Department Mappin Street Sheffield United Kingdom R&D Materials and Technology Development Seco Tools AB Zandterweg 14 Lottum5973 RC Netherlands Advanced Manufacturing Research Centre University of Sheffield RotherhamS60 5TZ United Kingdom Lund University Ole Römers väg 1 Lund221 00 Sweden R&D Materials and Technology Development Seco Tools AB Fagersta737 82 Sweden

Tool wear is one of the dominant factors that impacts the surface integrity of machined materials. Understanding the impact of tool wear on surface integrity is crucial in micromilling, due to the size of the features being machined and the cutting tools. Therefore, this work aims to analyse the impact of tool wear on surface integrity during the micromilling of Ti6Al4V. In this context, microslots were manufactured on a Ti6Al4V workpiece using both coated and uncoated 1 mm flat end mills at constant cutting parameters with varying cutting lengths in order to analyse the progression of tool wear with machined length and its impact on surface integrity. The microtools were investigated using both Scanning Electron Microscope (SEM) and infinite focus optical imaging (Alicona) to determine the tool wear evolution. Surface integrity was assessed by analysing surface roughness areal parameters, surface microscope images, and subsurface microstructure and microhardness perpendicular to the cutting direction. The results show that surface quality was not affected by the evolution of tool wear, with surface topography, including surface roughness parameters, remaining within a similar range until the catastrophic failure of the tool. Analysis of the machined surface revealed small chips adhered to it, which affected the surface texture height measurements, leading to a predominance of atypical peaks on the surface. Subsurface analysis of the machined material showed that the microstructure and microhardness remained consistent with the bulk material characteristics, indicating no evidence of severe plastic deformation in the machined subsurface. However, once the tool failed and began rubbing against the workpiece surface, swept grains due to material dragging and heat-affected zones were observed in the subsurface microstructure. Swept grains, caused by material extrusion, were also observed in the microstructure of the top burr formation regions throughout the experiments

关键词： Titanium alloys

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TC-LTIO: Tightly-coupled LidAr Thermal Inertial Odometry for LidAr and Visual Odometry degraded Environments

TC-LTIO: Tightly-coupled LiDAR Thermal Inertial Odometry for...

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International Conference on Control, Automation and Systems ( ICCAS)

作者： Junwoon Lee Taisei Ando Mitsuru Shinozaki Toshihiro Kitajima Qi An Atsushi Yamashita Department of Human and Engineered Environmental Studies The University of Tokyo Japan Technology Innovation R&D Dept.II Research & Development Headquarters KUBOTA Corporation Japan

ISBN: (数字)9788993215380

ISBN: (纸本)9798331517939

We propose tightly-coupled LidAr thermal inertial odometry for LidAr and visual odometry degraded environments to deal with LidAr and rGB-based visual odometry degenerate environments. Our approach exhibits high robustness and accuracy by tightly-coupled sensor fusion between LidAr edge/planar features and thermal camera point features. Furthermore, to mitigate challenges inherent in thermal vision such as low contrast, we employ a learning-based optical flow trained on both synthetic thermal images generated from rGB images and real-world thermal images. Experimental results demonstrate that our method effectively handles not only the degradation of LidAr and visual odometry but also challenges inherent in thermal vision.

关键词： degradation Laser radar Thermal factors Thermal sensors Feature extraction robustness Odometry Optical flow Visual odometry Thermal degradation

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Efficient Cloud resource Scheduling with an Optimized Throttled Load Balancing Approach

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Computers, Materials & Continua 2023年第11期77卷 2179-2188页

作者： V.dhilip Kumar J.Praveenchandar Muhammad Arif Adrian Brezulianu Oana Geman Atif Ikram Department of Computer Science and Engineering Vel Tech Rangarajan Dr.Sagunthala R&D Institute of Science and TechnologyChennai600062India Department of Computer Science and Engineering Karunya Institute of Technology and SciencesCoimbatoreTamil Nadu641114India Department of Computer Science Superior UniversityLahorePakistan Faculty of Electronics Telecommunications and Information Technology Gheorghe Asachi Technical University of IasiIa¸si700050Romania Department of Health and Human Development Stefan cel Mare University of SuceavaSuceava720229Romania Faculty of Ocean Engineering Technology and Informatics University Malaysia TerengganuKuala NerusMalaysia

Cloud technology is a new platform that offers on-demand computing Peripheral such as storage,processing power,and other computer system *** is also referred to as a system that will let the consumers utilize computational resources like databases,servers,storage,and intelligence over the *** a cloud network,load balancing is the process of dividing network traffic among a cluster of available servers to increase *** is also known as a server pool or server *** a single node is overwhelmed,balancing the workload is needed to manage unpredictable *** load balancer sends the load to another free node in this *** focus on the Balancing of workflows with the proposed approach,and we present a novel method to balance the load that manages the dynamic scheduling *** of the preexisting load balancing techniques is considered,however it is somewhat modified to fit the scenario at *** on the experimentation’s findings,it is concluded that this suggested approach improves load balancing consistency,response time,and throughput by 6%.

关键词： Load balancing throttled algorithm efficient resource allocation

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Integrated Well Network design Mode for CO2 EOr and Storage and its Application in L reservoir

Integrated Well Network Design Mode for CO2 EOR and Storage ...

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2025 International Petroleum technology Conference, IPTC 2025

作者： Wu, Zangyuan Tang, Yongliang Lian, Liming Zhou, daiyu Zhao, Haitao Shao, Guangqiang Feng, Qihong Zhou, Wei Li, Hong Bian, Wanjiang Zhang, Liang du, Hongbao Luo, Min Huang, Xingning Tarim Oilfield Company PetroChina Xinjiang Korla China R&D Center for Ultra-Deep Complex Reservoir Exploration and Development CNPC Xinjiang Korla China School of Petroleum Engineering China University of Petroleum East China Qingdao China Research Institute of Petroleum E&D Petrochina CNPC Beijing China Chengdu CK Energy Technology Co. Ltd. Sichuan Chengdu China

ISBN: (纸本)9781959025436

This paper addresses the challenge of difficulty in adjusting late-stage production in water-flooded reservoirs and proposes an integrated well network design mode for CO2 enhanced oil recovery (EOr) and storage. The well network is designed according to the full life cycle of carbon capture, utilization, and storage (CCUS), meeting the requirements of both CO2 EOr and storage phases. It extends the implementation time of CO2 EOr schemes to enhance oil recovery while ensuring effective CO2 storage, aligning with the overall strategy of global green and low-carbon development. The overall approach involves the use of a three-dimensional CO2 flooding injection and recovery well network, with progressive development in the vertical stratigraphic layers to maximize the utilization of existing old wells. The stratigraphic reconstruction involves the CO2 flooding injection and recovery well network, ensuring that new gas injection wells meet the requirements for CO2 injection processes and production rates, while also serving as replacements for gas injection in other stratigraphic layers. Production wells make use of the original old wells, and well completion methods are adjusted to achieve the development of replacement layers. The "top injection, middle production, bottom support" three-stage development method is designed to fully utilize the high points of reservoir microstructures and bottom water energy. Finally, well network optimization is achieved through streamline tracking simulation methods. The proposed technology has been applied in the CO2 enhanced oil recovery plan for the L reservoir. Initially focusing on CO2 flooding for oil recovery and shifting to CO2 storage later, it is projected to achieve a cumulative CO2 injection of tens of millions of tons over 46 years (including 40% recycled injection), with a displacement factor reaching 1.57PV. After deducting the recycled carbon amount, the cumulative carbon storage exceeds 6 million tons, affecting a vo

关键词： Crude oil

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Enhanced bifunctional catalytic activities of N-doped graphene by Ni in a 3d trimodal nanoporous nanotubular network and its ultralong cycling performance in Zn-air batteries

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Journal of Energy Chemistry 2022年第3期31卷 466-473,I0013页

作者： Yanyi Zhang Xiang-Peng Kong Xiaorong Lin Kailong Hu Weiwei Zhao Guoqiang Xie Xi Lin Xingjun Liu Yoshikazu Ito Hua-Jun Qiu School of Materials Science and Engineering Harbin Institute of TechnologyShenzhen 518055GuangdongChina Shenzhen R&D Center for Al-based Hydrogen Hydrolysis Materials Shenzhen 518055GuangdongChina State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin 150001HeilongjiangChina Blockchain Development and Research Institute Harbin Institute of TechnologyShenzhen 518055GuangdongChina Institute of Applied Physics Graduate School of Pure and Applied SciencesUniversity of TsukubaTsukuba 305-8573Japan

Free-standing and fexible air electrodes with long-lasting bifunctional activities for both the oxygen reduction reaction(Orr)and the oxygen evolution reaction(OEr)are crucial to the development of wearable Zn-air rechargeable *** this work,we synthesize a fexible air electrode consisting of 3d nanoporous N-doped graphene with trimodal shells and Ni particles through repeated chemical vapor deposition(CVd)and acidic etching *** results indicate that such trimodal graphene morphology significantly enhances the active N-dopant sites and graphene-coated Ni surface,which consequentially boosts both the Orr and OEr activities,as well as catalytic ***-principles density functional theory(dFT)calculations reveal the synergetic effects between the Ni and the N-doped graphene;namely,the Ni nanoparticles boost the bifunctional activities of the coated N-doped graphene,and in turn the graphene-covering layers enhance the stability of *** to the better protection from the triple graphene shells,our trimodal N-doped graphene/Ni-based Zn-air battery can be stably discharged/recharged beyond 2500 h with low *** is reasonable to expect that such freestanding trimodal graphene/Ni would be promising in many fexible energy conversion/storage devices.

关键词： Triple shells Bifunctional Hierarchical Cycling durability Orr/OEr

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Pilot Tests of Enhanced Oil recovery by Integrating Conformance Control Treatment and Surfactant Flooding for Low Permeability reservoirs

Pilot Tests of Enhanced Oil Recovery by Integrating Conforma...

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Abu dhabi International Petroleum Exhibition and Conference 2022, AdIPEC 2022

作者： Zhou, Nancy Chun Lu, Meng Liu, Yajun Li, Jianshen Liu, Fuchen Li, Wenhong Wu, Xinwei rao, Tianli Zhao, Kun Yang, Lu Wang, Yajun Gu, renchao CNPC USA United States CNPC Engineering Technology R&D Company Limited PetroChina Changqing Oilfield Company National Engineering Laboratory for Exploration Development of Low-Permeability Oil & Gas Fields China

ISBN: (纸本)9781613998724

For fractured low permeability reservoirs, there are challenges to enhance oil recovery after water flooding with high water cut contents. Because of unsatisfied surfactant polymer flooding, we explored the integrated EOr techniques of conformance control treatment and surfactant flooding. This paper analyzes the results of pilot tests with four injectors and 16 producers and concludes the effectiveness of integrated EOr techniques. Based on lab results of conformance control core flooding tests and surfactant based chemical EOr reservoir core flooding experiments, we did pilot simulation studies to develop pilot design parameters. Then through history match and detailed compositional simulation, we made EOr integrated technology design and compared several injection scenarios by predicting the potential performance. Finally, an integrated EOr technique with two conformance control treatments and surfactant flooding was selected and executed for three injectors in the interested pilot block. For the fourth injector, only surfactant flooding was used to compare. Lab results of conformance control core flooding tests showed the efficiency of plugging and a good fluid diversion performance of conformance polymer agents. Surfactant based chemical EOr reservoir core flooding experiments resulted from 70% to 98% residual crude oil recovery. The experimental data obtained was implemented in a numerical simulator model to find the potential incremental recovery associated with conformance control treatments and chemical flooding. A refined sector model used to further evaluate the effect of them. Positive simulation results boost pilot tests. Five fluid injection slugs including the cleaning slug, pre-flooding slug, near wellbore plugging slug, in deep conformance control slug, and surfactant flooding slug were run for three injectors in the range of eight to ten months of treatment. In the interested pilot block, the monthly decreasing rate of oil production dropped from 3

关键词： Low permeability reservoirs

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Fortifying Cloud data Security with the Maritime Search and rescue Algorithm 2

Fortifying Cloud Data Security with the Maritime Search and ...

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2nd International Conference on data Science and Information System, ICdSIS 2024

作者： Monica, K.M. Parameswaran, T. Swapna, J. Prabu, S. Kaliappan, S. Vit University School Of Computer Science And Engineering Chennai India Cmr University Lakeside Campus School Of Engineering And Technology Department Of Computer Science And Engineering Bangalore India Veltech Rangarajan Dr.Sagunthala R&d Institute Of Science And Technology Department Of Computer Science And Engineering Tamilnadu Chennai India Mahendra Institute Of Technology Department Of Ece Namakkal India Lovely Professional University Division Of Research And Development Punjab Phagwara India

ISBN: (纸本)9798350381665

Cloud computing has fundamentally transformed the accessibility and payment models of services within distributed system environments. In response to heightened security concerns, cloud service providers offer diverse resources spanning Infrastructure, Software, Platform, and database services, supported by security measures such as Service Level Agreements (SLAs), access control rules, and cryptographic methods. This paper introduces a novel data encryption technique, termed data Security in Cloud Computing using Maritime Search and rescue Algorithm (dSCC-MSrA). By integrating an enhanced cypher block chaining algorithm with logical substitution and the Maritime Search and rescue Algorithm (MSrA) for key generation, this method provides a unique approach to encryption. Through rigorous optimization and analysis, it has undergone significant refinement, with comparisons against industry-standard algorithms showcasing its efficacy. The primary objective is to elevate encryption procedures and introduce complexity to cryptanalysis, ultimately enhancing data security in cloud computing. © 2024 IEEE.

关键词： Cryptography

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Influence of the design of Ti (C, N)-based cermets with alternative binders on their performance and wear in milling

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Wear 2025年 570卷

作者： Premkumar, Vikas B.K. Chalkiadakis, Evangelos M'Saoubi, rachid Bushlya, Volodymyr Production and Materials Engineering Lund University Ole Römers Väg 1F Box 118 Lund221 00 Sweden R&D Materials and Technology Development Seco Tools AB FagerstaSE-73782 Sweden

Ti (C, N) based cermet materials are predominantly used in continuous finishing applications of metal cutting due to their high hardness, excellent resistance to oxidation and high chemical stability. However, their application in interrupted cutting like milling are limited due to their brittle-like failure due to low fracture toughness. In this work, alternative binder systems such as Co-Ni and Ni are investigated to study their influence on the material properties followed by evaluating their performance in face milling of quench and tempered 42CrMo4 steels having a hardness of 35 HrC. The results show that as the concentration of Ni in the binder increases, the hardness (HV) decreases and the Palmqvist fracture toughness (K1C) increases. This trend is more pronounced in the binder containing pure Ni. Thus, Ni helps in transforming the nature of a brittle-like cermet with Co binder to a tougher cermet with Co-Ni and pure Ni binder. Up-milling tests with coolant revealed that as-sintered cermet with pure Co and Co-Ni binder performed similarly while pure Ni binder showed premature failure. CVd coated cermet in as-deposited state shows a substantial improvement in performance of the Co-Ni binder compared to pure Co binder while Ni binder show rapid flaking of coating causing premature failure. Formation of comb cracks and parallel cracks networks followed by adhesion and impaction of steel in the cracks is observed as the main wear mechanism that causes rapid block isolation of the geometry leading to tool catastrophic failure. However, CVd coated Co-Ni binder system showed less adhesion in the crack networks which is speculated to be the reason for its improved performance. © 2025 The Authors

关键词： Cracks

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Optimal design of WET Etching Bath for 3d Flash Memories Using Multi-Objective Bayesian Optimization

Optimal Design of WET Etching Bath for 3D Flash Memories Usi...

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Joint e-Manufacturing and design Collaboration Symposium (eMdC) & International Symposium on Semiconductor Manufacturing (ISSM)

作者： Miyuki Kouda Yumi Mori Tomohiko Sugita Youyang Ng AI & System Research Center Frontier Technology R&D Institute KIOXIA Corporation Yokkaichi-shi Japan AI & System Research Center Frontier Technology R&D Institute KIOXIA Corporation Yokohama-shi Japan Advanced Memory Process Development Center Memory Division KIOXIA Corporation Yokkaichi-shi Japan

ISBN: (数字)9798331510589

ISBN: (纸本)9798331510596

In recent years, the complexity of semiconductor manufacturing processes has increased, leading to a growing need for the high-precision optimization of device structures. For example, in batch-type wet etching devices, the flow of chemical liquids within the process bath can vary depending on the device structure, causing variations in the etching state of the wafer. This issue is addressed using a feedback mechanism that iteratively adjusts the device structure based on the results of an etching experiment, thereby achieving more uniform etching conditions. However, this approach requires a large number of trial experiments. In the fabrication process of 3d flash memories, word-line formation in the silicon substrate requires precise control of the silicon concentration in the etching solution. However, this concentration can fluctuate due to the dissolution of the SiN film during the etching process. This fluctuation may cause various problems. This study introduces an innovative method utilizing multi-objective Bayesian optimization to derive optimal wet etching bath design parameters; this method is informed by image and physical-quantity data from fluid dynamics simulations [1]. This approach is validated through simulation experiments, whose results are used to identify the best possible wet etching bath designs effectively.

关键词： Wet etching Three-dimensional displays Fluid dynamics Semiconductor device manufacture Silicon Bayes methods Flash memories Optimization Silicon dioxide Substrates

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Physiological and molecular mechanisms of insect appendage regeneration

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Cell regeneration 2023年第1期12卷 351-362页

作者： Jiru Zhong Andi Jing Shaojuan Zheng Sheng Li Xiaoshuai Zhang Chonghua ren Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied Technology Guangzhou Key Laboratory of Insect Development Regulation and Application ResearchInstitute of Insect Science and TechnologySchool of Life SciencesSouth China Normal UniversityGuangzhou 510631China Guangmeiyuan R&D Center Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied TechnologySouth China Normal UniversityMeizhou 514779China

regeneration,as a fascinating scientific field,refers to the ability of animals replacing lost tissue or body *** metazoan organisms have been reported with the regeneration phenomena,but showing evolutionarily variable *** the most diverse metazoan taxon,hundreds of insects show strong appendage regeneration *** regeneration process and ability are dependent on many factors,including macroscopic physiological conditions and microscopic molecular *** article reviews research progress on the physiological conditions and internal underlying mechanisms controlling appendage regeneration in insects.

关键词： Appendage regeneration Physiological condition Molecular mechanism Signaling pathways Epigenetics Insects

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