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In-situ HRTEM observations of intermediate phase transformation in lattice reorientation in HCP rhenium

材料科学技术（英文版） 2025年第3期206卷 15-25页

作者： Yang He Zhengwu Fang Bin Li Chongmin Wang Scott X.Mao Department of Mechanical Engineering and Materials Science University of PittsburghPittsburghPA 15261USA Department of Industrial and Manufacturing Systems Engineering Iowa State UniversityAmesIA 50011USA Environmental Molecular Sciences Laboratory Pacific Northwest National LaboratoryRichlandWashington 99352USA

In-situ high-resolution transmission electron microscopy(HRTEM)is performed to investigate the de-formation behavior of hexagonal close-packed rhenium(Re)which is compressed along the<1(1)00>*** simulations are also conducted to better understand the deformation *** types of lattice reorientation are observed during *** first type involves the reori-entation of one lattice by～90° around<11(2)0>,which is accomplished by the formation of an interme-diate face-center-cubic(FCC)phase at the *** transformation sequence can be described as{1(1)00}matrix →{111}FCC →(0001)*** the second type,a new grain is formed but does not satisfy any known twin relationship with the matrix,and an intermediate FCC phase is also *** transfor-mation sequence can be described as{1(1)01}matrix →{111｝FCC →(0001)*** responsible for the observed lattice reorientation and sequential phase transitions are analyzed by conducting lattice correspondence analyses on the simulation *** accommodation is also analyzed to explain the mechanisms for lattice reorientation and the intermediate phase *** results provide new insight into the deformation behavior of HCP metals.

关键词： Lattice reorientation Phase transformation Lattice correspondence

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Characterization of the asymmetric evolving yield and flow of 6016-T4 aluminum alloy and DP490 steel

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Journal of materials science & Technology 2023年第2期133卷 209-229页

作者： Kai Du Shaohui Huang Yong Hou Haibo Wang Yinxiao Wang Wentao Zheng Xiaoguang Yuan School of Materials Science and Engineering Shenyang University of TechnologyShenyang 110870China Department of Technical Planning Press Shop BMW Brilliance Automotive Ltd.Shenyang 100044China Department of Materials Science and Engineering&RIAM Seoul National UniversitySeoul 08826Republic of Korea School of Mechanical and Materials Engineering North China University of TechnologyBeijing 100144China

6016-T4 aluminum alloy and DP490 steel were systematically tested under 24 proportional loading paths,including uniaxial tensile tests with a 15°increment,uniaxial compressive and simple shear tests with a 45°increment,and biaxial tensile tests using cruciform *** specimens in the rolling/transverse and 45°/135°sampling directions were tested with seven and four different stress ra-tios,*** normal and diagonal planes plastic work contours and the yield stresses under uniaxial tension and compression were measured to investigate the anisotropic ***,the normal and diagonal planes directions of plastic strain rate and the rα-values under uniaxial tension and compression were characterized to confirm the plastic *** existing asymmetric yield crite-ria under the associated and non-associated flow rules were comprehensively evaluated to describe the asymmetric plastic anisotropy of 6016-T4 aluminum alloy and DP490 *** results suggest that in the investigated yield criteria,the non-associated models can predict the tension and compression asym-metry of materials more accurately than the associated models,and the function of stress triaxiality can more effectively describe the asymmetric yield behavior than the first stress *** addition,the pure shear stress states are helpful in assessing the validity and applicability of advanced asymmetric yield stress functions,and the inspection of diagonal plane plastic work contours containing more pure shear stress states should prioritized over that of normal plane plastic work *** evaluation of plastic potential functions should not only consider the prediction accuracy of the normal plane di-rections of plastic strain rate,but also further check the diagonal plane directions of plastic strain *** mechanical properties as a function of equivalent plastic strain to calibrate parameters of the yield criterion allows the continuous capture of anisot

关键词： Proportional loading paths Diagonal plane Asymmetric yield criterion Non-associated flow rule Anisotropic hardening Sheet metal forming

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A low-cost and high-strength basalt/carbon fiber reinforced polymer improved by imitating tree-root micro/nano aramid short fiber

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Chinese Journal of Aeronautics 2024年第10期37卷 526-538页

作者： Guangming YANG Yanan LYU Fei CHENG Jiaxin HE Shihao ZUO Wenyi HUANG Yunsen HU Xiaozhi HU Xi CHEN Shock and Vibration of Engineering Materials and Structures Key Lab of Sichuan Province Southwest University of Science and TechnologyMianyang 621010China Engineering Research Center of Biomass Materials Ministry of EducationSouthwest University of Science and TechnologyMianyang 621010China School of Materials and Chemistry Southwest University of Science and TechnologyMianyang 621010China Institute of Automation Chinese Academy of SciencesBeijing 100190China School of Artificial Intelligence University of Chinese Academy of SciencesBeijing 100101China School of Mechanical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China Department of Mechanical Engineering University of Western AustraliaPerth 6009Australia

The high-strength Basalt Carbon Fiber Reinforced Polymer(BCFRP)composites had been manufactured by guiding Imitating Tree-root Micro/Nano Aramid Short Fiber(ITMNASF)into the interlayer of Basalt Fiber(BF)and Carbon Fiber(CF)plies to form thin interleaving,and various mass proportions of IT-MNASF were designed to discuss the reinforcing effect on the BCFRP heterogeneous *** results of three points bending tests showed that flexural strength and energy absorption of 4wt%IT-MNASF reinforced BCFRP heterogeneous composites had been improved by 32.4%and 134.4%respectively compared with that of unreinforced *** 4wt%IT-MNASF reinforced BCFRP specimens showed both a greater strength and a lower cost(reduced by 31%around)than that of plain CFRP composites.X-ray micro-computed tomography scanning results exhibited that the delamination-dominated failure of plain BCFRP composites was changed into multi-layer BF and CF fabrics *** reinforcing mechanism revealed that the introduced IT-MNASF could construct quasi-vertical fiber bridging,and it was used as"mechanical claws"to grasp adjacent fiber layers for creating a stronger mechanical interlocking,and this effectively improved resin-rich region and interfacial transition region at the *** simple and effective IT-MNASF interleaving technique was very successful in low-cost and high-strength development of BCFRP heterogeneous composites.

关键词： Basalt carbon fiber reinforced polymer Micro/nano aramid fiber Fiber bridging Strength improvement Low-cost substitution

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Coupling metal-organic frameworks and wood-based carbon for water remediation

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Nano Research 2024年第6期17卷 5661-5669页

作者： Akhter Zia Manish Neupane Aidan McGlone Rui He Ruikun Xin Yifeng Liu Qiangu Yan Jinwu Wang Ling Li Zhiyong Cai Pei Dong Yingchao Yang Department of Mechanical Engineering University of MaineOronoME 04469USA Department of Mechanical and Aerospace Engineering University of MissouriColumbiaMO 65211USA Department of Mechanical Engineering George Mason UniversityFairfaxVA 22030USA Department of Civil and Environmental Engineering Rice UniversityHoustonTX 77005USA Department of Materials Science and NanoEngineering Rice UniversityHoustonTX 77005USA Forest Products Laboratory USDAMadisonWI 53726USA School of Forestry Resources University of MaineOronoME 04469USA

Fresh and clean water is highly demanded throughout the *** effectively address the need,nanomaterials enabled nanotechnology has been explored as a means of more efficient,reliable,and environmentally friendly approach towards water treatment *** concern in adopting nanomaterials is how to retrieve them from water body to avoid secondary *** this work,the earth abundant and sustainable wood,e.g.,basswood,was selected and carbonized into porous carbon as host skeleton,and metal-organic frameworks(MOFs),e.g.,MOF-199 with extremely high surface area,were grown throughout all channels in the porous basswood *** the traditional organic pollutant,methyl orange(MO),the combination of MOFs and basswood carbon(MOFs@carbon)demonstrates a remarkable adsorption capacity,which is 243%and 454%higher than basswood carbon and MOF-199,*** an outstanding adsorption performance originates from that the positively charged carbon pulls MO molecules close to carbon surface,leading to a high MO molecule concentration,and then the concentration gradient drives the MO molecules to be stored inside MOFs,functioning like *** findings highlight the potential application of coupled MOFs and biomass carbon in addressing water remediation.

关键词： metal-organic framework(MOF)-199 basswood carbon MOFs@carbon methyl orange

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An interpretable deep learning approach for designing nanoporous silicon nitride membranes with tunable mechanical properties

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npj Computational materials 2023年第1期9卷 1524-1533页

作者： Ali KShargh Niaz Abdolrahim Department of Mechanical Engineering University of RochesterRochesterNY 14627USA Materials Science program University of RochesterRochesterNY 14627USA Laboratory for Laser Energetics University of RochesterRochesterNY 14627USA

The high permeability and strong selectivity of nanoporous silicon nitride(NPN)membranes make them attractive in a broad range of *** their growing use,the strength of NPN membranes needs to be improved for further extending their biomedical *** this work,we implement a deep learning framework to design NPN membranes with improved or prescribed strength *** examine the predictions of our framework using physics-based *** results confirm that the proposed framework is not only able to predict the strength of NPN membranes with a wide range of microstructures,but also can design NPN membranes with prescribed or improved *** simulations further demonstrate that the microstructural heterogeneity that our framework suggests for the optimized design,lowers the stress concentration around the pores and leads to the strength improvement of NPN membranes as compared to conventional membranes with homogenous microstructures.

关键词： tunable prescribed strength

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FE Analysis of Additive Manufacturing of Al Magnetic Shield for EV Wireless Charging

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Journal of The Institution of Engineers (India): Series D 2024年第3期105卷 1763-1770页

作者： Santhosh Kumar, S. Datta, Shubhabrata Center for Composites and Advanced Materials Department of Mechanical Engineering SRM Institute of Science and Technology Kattankulathur Chengalpattu district Tamil Nadu 603204 India

The present study describes the finite element analysis of additive manufacturing of an electric vehicle component, a magnetic shield for wireless charging using aluminum alloy. Metal additive manufacturing involves making substantial and complex components layer by layer using laser powder bed fusion process. The AlSi10Mg alloy is used here as the material for the simulation of the process for the designed component. The drawback of the laser powder bed fusion process is the emergence of thermal residual stress resulting from sudden heating and cooling. This research aims to reduce this residual stress and part distortion with the help of finite element simulation, varying the machine parameters, viz. laser beam diameter, laser power, powder layer thickness, laser scan speed, and hatch distance. The Ansys Additive print software is used for the present simulation. Based on the simulation result, we found an optimized Al magnetic shield machine parameter that reduces the residual stress and part deformation. The optimized machine parameters are found to be scanning speed of 2000 mm/s, layer thickness of 50 μm, laser power of 350 W, laser beam diameter of 100 μm and hatch spacing of 200 μm. © The Institution of Engineers (India) 2023.

关键词： Finite element method

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Unlocking of Schottky Barrier Near the Junction of MoS2 Heterostructure Under Electrochemical Potential

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Energy & Environmental materials 2025年第1期8卷 327-333页

作者： Kubra Aydin Mansu Kim Hyunho Seok Chulwoo Bae Jinhyoung Lee Muyoung Kim Jonghwan Park Joseph T.Hupp Dongmok Whang Hyeong-U Kim Taesung Kim SKKU Advanced Institute of Nanotechnology (SAINT) Sungkyunkwan University Department of Nano Science and Technology Sungkyunkwan University Department of Chemistry Northwestern University School of Advanced Material Science and Engineering Sungkyunkwan University School of Mechanical Engineering Sungkyunkwan University Center for Quantum Nanoscience Institute for Basic Science (IBS) Semiconductor Manufacturing Research Center Korea Institute of Machinery and Materials (KIMM) Nano-Mechatronics University of Science & Technology (UST) Department of Nano Engineering Sungkyunkwan University

The exploration of heterostructures composed of two-dimensional(2D)transition metal dichalcogenide(TMDc) materials has garnered significant research attention due to the distinctive properties of each individual compo... 详细信息

关键词： hydrogen evolution reaction (HER) molybdenum disulfide (MoS2) plasma-enhanced chemical vapor deposition (PECVD) Schottky barrier van der Waals (vdW) heterostructure

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Highly Flexible and Self-Healable Electronic Skin 23

Highly Flexible and Self-Healable Electronic Skin

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23rd International Conference on Composite materials, ICCM 2023

作者： Hong, Sung Hwa Shi, Harvey HaoTian Wang, Guorui Filleter, Tobin Naguib, Hani E. Department of Mechanical and Industrial Engineering Department of Materials Science and Engineering University of Toronto ON Canada

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Examining whether normal stress affects deformation twinning

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材料科学技术（英文版） 2025年第5期208卷 307-312页

作者： R.H.Li Z.J.Zhang J.X.Yan J.B.Yang Z.Qu R.Liu X.T.Li X.G.Wang Y.N.Zhang A.G.Sheinerman Z.F.Zhang T.G.Langdon Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Mechanical Engineering Liaoning Petrochemical UniversityFushun 113001China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Institute of Problems of Mechanical Engineering Russian Academy of SciencesSt.Petersburg 199178Russia Department of Mechanical Engineering University of SouthamptonSouthampton SO17 1BJUnited Kingdom

***Twinning is a fundamental mechanism for plastic deforma-tion in many face-centered cubic(FCC)metals having low stack-ing fault energies(SFEs)[1,2].

*** Twinning is a fundamental mechanism for plastic deforma-tion in many face-centered cubic(FCC)metals having low stack-ing fault energies(SFEs)[1,2].

关键词： whether stress normal affects deformation examining twinning

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Fabrication of PMMA nanocomposite biomaterials reinforced by cellulose nanocrystals extracted from rice husk for dental applications

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Friction 2024年第12期12卷 2808-2825页

作者： Ahmed FOULY Walid M.DAOUSH Hesham I.ELQADY Hany S.ABDO Mechanical Engineering Department College of EngineeringKing Saud UniversityRiyadh 11421Saudi Arabia The King Salman Center for Disability Research Riyadh 11421Saudi Arabia Department of Production Engineering and Mechanical Design Faculty of EngineeringMinia UniversityMinia 61519Egypt Department of Chemistry College of ScienceImam Mohammad Ibn Saud Islamic University(IMSIU)Riyadh 11623Saudi Arabia Faculty of Technology and Education Helwan UniversityCairo 11281Egypt Faculty of Engineering Aswan UniversityAswan 81528Egypt Center of Excellence for Research in Engineering Materials(CEREM) King Saud UniversityRiyadh 11421Saudi Arabia Mechanical Design and Materials Department Faculty of Energy EngineeringAswan UniversityAswan 81521Egypt

The primary objective of global studies is to develop the properties and durability of polymers for various *** it comes to dental disability,denture base materials must have sufficient mechanical and tribological performance in order to withstand the forces experienced in the *** work aims to investigate the effects of the addition of low content of cellulose nanocrystals(CNC)on the mechanical and tribological performance of the polymethyl methacrylate(PMMA)*** weight percent of CNC(0,0.2,0.4,0.6,and 0.8 wt%)were added to the PMMA matrix followed by ball milling to evenly distribute the nanoparticles reinforced phase in the matrix *** findings emphasize the significant impact of CNC integration on the performance of PMMA *** increasing the content of the CNC nanoparticles,the mechanical properties of PMMA were *** addition,the tribological outcomes demonstrated a significant reduction in the friction coefficient besides an enhancement in the wear resistance as the weight percentage of nanoparticles *** surface of the worn samples was investigated by utilizing SEM to identify the wear mechanisms corresponding to the different *** addition,a finite elment model(FEM)was developed to ascertain the thickness of the worn layer and the generated stressed on the surfaces of the nanocomposite throughout the friction process.

关键词： polymethyl methacrylate nanocomposite cellulose nanocrystals denture materials rice husk polymethyl methacrylate(PMMA) wear resistance

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