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Formability Analysis of Metal–Polymer Sandwich Composites Made of Al and PE Sheets Using Numerical Simulations 1

12th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes, NUMISHEET 2022

作者： Bekele, Tsegaye Janaki Ramulu, Perumalla Beri, Habtamu Siraji, Amrela Praveen Kumar Reddy, P. Program of Mechanical Engineering School of Mechanical Chemical and Materials Engineering Adama Science and Technology University Adama Ethiopia Centre of Excellence for Advanced Manufacturing Engineering School of Mechanical Chemical and Materials Engineering Adama Science and Technology University Adama Ethiopia School of Technology Gitam Deemed to Be University and Mahaveer Institute of Science and Technology Hyderabad India

ISBN: (数字)9783031062124

ISBN: (纸本)9783031062117

Metal/polymer/metal (MPM) sandwiched composites are in the class of capable engineering materials which give outstanding strength-to-weight ratios because of their comparatively low density. These materials are vital constituents within the automobile, aerospace, marine, and civil construction industries as substitutes for sheet metals that considerably reduce weight while not compromising practicality such as load bearing capacity stiffness and flexibility. For these materials to be utilised within the aforesaid industries, they need to bear numerous forming processes. This paper investigates the formability of metal-polymer sandwich composites made of AA-PE-AA (APA) and Galvanised Steel-PE-Galvanised Steel (GPG) considering the adhesion strength via numerical simulation. For evaluating the formability, the actual limit dome height (LDH)—bi-axial strain path—test setup is simulated using FEM. The results analysed are forming limit diagram (FLD), punch force distribution, and dome height at diverse conditions of punch velocity and friction. All the numerical simulations were performed using Altair Hyperworks with various blank sizes. The results are noted as FLD and dome height at varied conditions. A comparison is made to represent the best combinations for formability of the sandwich composites. Maximum formability and dome height are attained at low friction conditions and forming speed. © 2022, The Minerals, Metals & materials Society.

关键词： Adhesion

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Hardness-thermal stability synergy in nanograined Ni and Ni alloys:Superposition of nanotwin and low-energy columnar boundary

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Journal of materials science & Technology 2023年第6期137卷 123-131页

作者： F.H.Duan Y.Lin Q.Li J.H.Luan J.Lu J.Pan Y.Li Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Laboratory of Nanomaterials&Nanomechanics Department of Mechanical EngineeringCity University of Hong KongHong KongChina State Key Laboratory of Material Processing and Die&Mould Technology and School of Materials Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China Department of Materials Science and Engineering City University of Hong KongHong KongChina Centre for Advanced Structural Materials Greater Bay Joint DivisionShenyang National Laboratory for Materials ScienceCity University of Hong Kong Shenzhen Research InstituteShenzhen 518057China City U-Shenzhen Futian Research Institute Shenzhen 518045China

Refining grains into nanoscale can significantly strengthen and harden metallic materials;however,nanograined metals generally exhibit low thermal stability,hindering their practical *** this work,we exploit the superposition of the contribution of nanotwins,low-angle grain boundaries,and microalloying to tailor superior combinations of high hardness and good thermal stability in Ni and Ni *** the nanotwinned Ni having a twin thickness of∼2.9 nm and grain size of 28 nm,it exhibits a hardness over 8.0 GPa and an onset coarsening temperature of 623 K,both of which are well above those of nanograined ***/Mo microalloying can further improve the onset coarsening temperature to 773 K without comprising *** analyses reveal that high hardness is achieved via strengthen-ing offered by extremely fine ***,the superior thermal stability is mainly ascribed to the low driving force for grain growth induced by the low-angle columnar boundary architecture and to the additional pinning effect on the migration of twin/columnar boundaries provided by minor Re/Mo *** present work not only reveals a family of nanotwinned metals possessing the combination of ultra-high hardness and high thermal stability but also provides a strategy for tailoring properties of metallic materials by pairing low-angle grain boundaries and twin boundaries.

关键词： Nanotwin Thermal stability Hardness Low-angle grain boundary Microalloying

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Mitochondria-specific near-infrared photoactivation of peroxynitrite upconversion luminescent nanogenerator for precision cancer gas therapy

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Acta Pharmaceutica Sinica B 2024年第1期14卷 378-391页

作者： Hui Yu Aliya Tiemuer Xufeng Yao Mingyuan Zuo Hai-Yan Wang Yi Liu Xiaoyuan Chen Department of Biomedical Engineering School of EngineeringChina Pharmaceutical UniversityNanjing 211198China School of Mechanical Engineering Southeast UniversityNanjing 211189China Departments of Diagnostic Radiology SurgeryChemical and Biomolecular Engineeringand Biomedical EngineeringYong Loo Lin School of Medicine and College of Design and EngineeringNational University of SingaporeSingapore 119074Singapore Clinical Imaging Research Centre Centre for Translational MedicineYong Loo Lin School of MedicineNational University of SingaporeSingapore 117599Singapore Nanomedicine Translational Research Program Yong Loo Lin School of MedicineNational University of SingaporeSingapore 117597Singapore Institute of Molecular and Cell Biology Agency for ScienceTechnologyand Research(A*STAR)ProteosSingapore 138673Singapore

Gas therapy is emerging as a highly promising therapeutic strategy for cancer ***,there are limitations,including the lack of targeted subcellular organelle accuracy and spatiotemporal release precision,associated with gas *** this study,we developed a series of photoactivatable nitric oxide(NO)donors NRh-R-NO(R=Me,Et,Bn,iPr,and Ph)based on an N-nitrosated upconversion luminescent rhodamine *** the irradiation of 808 nm light,only NRh-Ph-NO could effectively release NO and NRh-Ph with a significant turn-on frequency upconversion luminescence(FUCL)signal at 740 nm,ascribed to lower N-N bond dissociation *** also investigated the involved multistage near-infrared-controlled cascade release of gas therapy,including the NO released from NRh-Ph-NO along with one NRh-Ph molecule generation,the superoxide anion O_(2)^(⋅−)produced by the photodynamic therapy(PDT)effect of NRh-Ph,and highly toxic peroxynitrite anion(ONOO‒)generated from the co-existence of NO and O_(2)^(⋅−).After mild nano-modification,the nanogenerator(NRh-Ph-NO NPs)empowered with superior biocompatibility could target *** an 808 nm laser irradiation,NRh-Ph-NO NPs could induce NO/ROS to generate RNS,causing a decrease in the mitochondrial membrane potential and initiating apoptosis by caspase-3 activation,which further induced tumor immunogenic cell death(ICD).In vivo therapeutic results of NRh-Ph-NO NPs showed augmented RNS-potentiated gas therapy,demonstrating excellent biocompatibility and effective tumor inhibition guided by real-time FUCL ***,this versatile strategy defines the targeted RNS-mediated cancer therapy.

关键词： Near infrared Photo-triggered Mitochondrion Upconversion luminescent bioimaging Peroxynitrite Nanogenerator Gas therapy In vivo

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engineering heterogeneous microstructures for enhanced strength and ductility in air-cooled Al−Mg−Si alloys

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Transactions of Nonferrous Metals Society of China 2025年第4期35卷 1017-1031页

作者： Yi-han GAO Xin-xin ZHANG Jing-zhe ZHOU Peng XU Zhi-jie XIN Jun-hua GAO Yan-hao SHI You LÜ Yu-fang ZHAO Jing-yang LI School of Aerospace Engineering North University of ChinaTaiyuan 030051China Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of EducationHubei Key Laboratory of Material Chemistry and Service FailureSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan 430074China R&D Material Division Press Metal International Ltd.Foshan 528137China School of Mechanical Engineering North University of ChinaTaiyuan 030051China

The heterogeneity ofα-Al(Fe,Mn)Si dispersoids andβ″precipitates was tuned to enhance the strength−ductility synergy of air-cooled Al−Mg−Si *** electron microscopy(SEM)and transmission electron microscopy(TEM)were employed to elucidate the microstructural parameters of these two strengthening *** results show that the microstructural heterogeneity can be triggered by the absence of homogenization,resulting in the presence of dispersoid-free zones(DFZs)and dispersoid zones(DZs),in conjunction with bimodalβ″*** analytical calculations,from the strengthening model,clarify that the strategically dispersedα-Al(Fe,Mn)Si andβ″particles create“soft”and“hard”domains within the alloy,resultantly improving the mechanical properties.

关键词： Al−Mg−Si alloy microstructure heterogeneity dispersoid nanoprecipitate mechanical property

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Lateral epitaxial growth of two-dimensional heterostructure linked by gold adatoms

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Nano Research 2021年第3期14卷 887-892页

作者： Nan Si Tao Shen Xinyi Liu Dechun Zhou Qingmin Ji Wei Liu Shuang Li Tianchao Niu Herbert Gleiter Institute of Nanoscience School of Material Science and EngineeringNanjing University of Science and TechnologyNanjing210094China Nano and Heterogeneous Materials Center School of Materials Science and EngineeringNanjing University of Science and TechnologyNanjing210094China School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai200240China

Lateral two-dimensional(2D)heterostructures have great potential for device engineering at the atomistic *** production is hindered by difficulties in obtaining atomically sharp interface free from *** we report the continuous construction of a lateral heterostructure using blue phosphorene and tetrafluoro-tetracyanoquinodimethane(F_(4)TCNQ)as the building *** lateral heterostructure is achieved by linking the semiconducting F_(4)TCNQ-Au metal organic framework and the metallic blue phosphorene-Au network via Au *** structural and electronic properties of the heterostructure have been investigated by means of scanning tunneling microscopy and spectroscopy(STM/S),complemented by density functional theory(DFT)calculations,demonstrating a structurally and electrically abrupt *** approach offers the possibility of high flexibility and control that can be extended to other metal-organic species and 2D materials,establishing a foundation for the development of atomically thin in-plane superlattice and devices.

关键词： phosphorene self-assembly scanning tunneling microscopy two-dimensional materials density functional theory

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Laser Ultrasonic Inspection of Carbon Fiber-Titanium Alloy Composite Gun Barrel 4

Laser Ultrasonic Inspection of Carbon Fiber-Titanium Alloy C...

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4th International Conference on Defence Technology, ICDT 2024

作者： Tang, Zhenhe Duan, Jian Sun, Yan Sun, Liangwen Bao, Zhaofu Zhu, Xiaolin Chen, Long Liu, Xiaoyu Liu, Zenghua Shandong Non-metallic Material Institute Jinan250031 China College of Mechanical and Energy Engineering Beijing University of Technology Beijing100124 China School of Information Science and Technology Beijing University of Technology Beijing100024 China

Thanks to the development and application of composite material reinforced metal based components, the high strength and lightweight requirements of weapons and equipment have been further met. Non-destructive testing for detecting interface delaminations between dissimilar materials, as well as identifying internal defects within each material layer, is an important means to ensure equipment quality and reliability. This paper proposes a laser ultrasonic guided wave field detection and imaging method for identifying defects in carbon fiber-titanium alloy composite gun barrels. The method involves using a pulsed laser to excite ultrasonic guided waves, scanning the gun barrel, receiving wave field signals through a piezoelectric wafer, and imaging defects in the gun barrel based on frequency domain instantaneous wavenumbers. The results indicate that the proposed method can effectively detect and locate delamination and internal defects in carbon fiber-titanium alloy composite materials. © 2024 Published under licence by IOP Publishing Ltd.

关键词： Titanium alloys

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Evaluation of temperature dependent vortex pinning properties in strongly pinned YBa_(2)Cu_(3)O_(7-δ)thin films with Y_(2)BaCuO_(5)nanoinclusions

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Superconductivity 2024年第1期9卷 95-105页

作者： Alok K.Jha Kaname Matsumoto Tomoya Horide Shrikant Saini Ataru Ichinose Paolo Mele Yutaka Yoshida Satoshi Awaji Department of Materials Science and Engineering Kyushu Institute of TechnologyTobata-kuKitakyushu 804-8550Japan Department of Mechanical and Control Engineering Kyushu Institute of TechnologyTobata-kuKitakyushu 804-8550Japan Central Research Institute of Electrical Power Industry YokosukaKanagawa 240-0196Japan College of Engineering-Innovative Global Program Shibaura Institute of TechnologyMinuma-kuSaitama 337-8570Japan Department of Energy Engineering and Science Nagoya UniversityChikusa-kuNagoya 464-8603Japan Institute for Materials Research Tohoku UniversityAoba-kuSendai 980-8577Japan

The pinning of quantized magnetic vortices in superconducting YBa_(2)Cu_(3)O_(7-δ)(YBCO or Y123)thin films with Y_(2)BaCuO_(5)(Y211)nanoinclusions have been investigated over wide temperature range(4.2-77 K).The concentration of Y211 nanoinclusions has been systematically varied inside YBCO thin films prepared by laser ablation technique using surface modified target *** pinning force density values(Fp∼0.5 TNm^(−3)at 4.2 K,9 T)have been observed for the YBCO film with moderate concentration of Y211 nanoinclusions(3.6 area%on ablation target).In addition,uniform enhancement in critical current density(J_(c))was observed in the angular dependent J_(c)measurement of YBCO+Y211 nanocomposite films.Y211 nanoinclusions have been found to be very efficient in pinning the quantized vortices thereby enhancing the in‐field J_(c)values over a wide range of *** the concentration of Y211 secondary phase into Y123 film matrix results into agglomeration of Y211 phase and observed as increased Y211 nanoparticle *** larger secondary phase nanoparticles are not as efficient pinning centers at lower temperatures as they are at higher temperatures due to substantial reduction of the coherence length at lower *** of the temperature dependence of J_(c)for YBCO+Y211 nanocomposite films has been conducted and possible vortex pinning mechanism in these nanocomposite films has been discussed.

关键词： YBCO thin film Critical current Vortex pinning Nanoscale APCs

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Two-Dimensional Metal-Halide Perovskite-based Optoelectronics: Synthesis, Structure, Properties and Applications

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Energy & Environmental materials 2021年第1期4卷 46-64页

作者： Hongda Li Tianyuan Luo Shoufeng Zhang Zijun Sun Xiong He Wenfeng Zhang Haixin Chang Center for Materials Science and Engineering School of Mechanical and Transportation EngineeringGuangxi University of Science and TechnologyLiuzhou 545006China Quantum-Nano Matter and Device Lab State Key Laboratory of Material Processing and Die&Mould TechnologySchool of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China

In the past decade, metal-halide perovskites have attracted increasing attention in optoelectronics, due to their superior optoelectronic ***, inherent instabilities of conventional three-dimensional(3D)perovskites over moisture, heat, and light remain a severe challenge before the realization of commercial application of metal-halide ***, when the dimensions of metal-halide perovskites are reduced to two dimensions(2D), many of the novel properties will arise, such as enlarged bandgap, high photoluminescence quantum yield, and large exciton binding energy. As a result, 2D metal-halide perovskite-based optoelectronic devices display excellent performance, particularly as ambient stable solar cells with excellent power conversion efficiency(PCE), high-performance light-emitting diodes(LEDs) with sharp emission peak, and high-sensitive photodetectors. In this review, we first introduce the synthesis, structure,and physical properties of 2D perovskites. Then, the 2D perovskite-based solar cells, LEDs, and photodetectors are discussed. Finally, a brief overview of the opportunities and challenges for 2D perovskite optoelectronics is presented.

关键词： applications metal-halide perovskites optoelectronics two-dimensional

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Research Progress of Soybean Protein Adhesive:A Review

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Journal of Renewable materials 2022年第10期10卷 2519-2541页

作者： Yantao Xu Yufei Han Jianzhang Li Jing Luo Sheldon QShi Jingchao Li Qiang Gao An Mao MOE Key Laboratory of Wooden Material Science and Application&Beijing Key Laboratory of Wood Science and Engineering Beijing Forestry UniversityBeijing100083China College of Materials Science and Engineering Nanjing Forestry UniversityNanjing210037China College of Engineering Department of Mechanical and Energy Engineering University of North TexasDenton76203USA State Forestry and Grassland Administration Key Laboratory of Silviculture in Downstream Areas of the Yellow River College of ForestryShandong Agricultural UniversityTai’an271000China

Traditional formaldehyde-based adhesives rely excessively on petrochemical resources,release toxic gases,and pollute the ***-derived soybean protein adhesives are eco-friendly materials that have the potential to replace the formaldehyde-based adhesives used to fabricate wood-based ***,the poor water resistance,high brittleness,and poor mildew resistance of soybean protein adhesives limit their industrial *** article reviews recent research progress in the modification of soybean protein adhesives for improving the bonding performance of adhesives used for wood-based panel *** methods were summarized in terms of water resistance,solid content,and mildew *** modification mechanisms and remaining problems were also ***,the current industrial applications and the future research direction of soybean protein adhesives are discussed.

关键词： Soybean protein adhesive bonding performance water resistance solid content mildew resistance

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Electrochemically Modulated Metasurfaces

Electrochemically Modulated Metasurfaces

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2023 Conference on Lasers and Electro-Optics, CLEO 2023

作者： Eaves-Rathert, Janna Kovalik, Elena Ugwu, Chibuzor Fabian Pint, Cary L. Valentine, Jason G. Department of Mechanical Engineering Vanderbilt University NashvilleTN37212 United States Interdisciplinary Materials Science Program Vanderbilt University NashvilleTN37212 United States Department of Mechanical Engineering Iowa State University AmesIA50011 United States

Electrochemical intercalation of lithium in titanium dioxide and silicon-based metasurfaces is used to initiate phase changes in a continuously tunable, reversible, and bistable manner for dynamic control over structu... 详细信息

ISBN: (纸本)9781957171258

关键词： Titanium dioxide

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