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Journal of Materials Science & Technology 2019年第1期35卷 192-200页

作者： q.wen w.y.Li w.b.wang f.f.wang y.J.Gao V.Patel State Key Laboratory of Solidification Processing Shaanxi Key Laboratory of Friction Welding Technologies Northwestern Polytechnical University china fSw center china Academy of Launch Vehicle Technology Beijing Institute of Astronautical Systems Engineering capital Aerospace Machinery company Pandit Deendayal Petroleum University

Stationary shoulder friction stir lap welding(SSfSLw) was employed to weld 2024 aluminum alloy. A coupled Eulerian-Lagrangian(cEL) model was developed to investigate the lap interface behavior during SSfSLw. Numerical results of material movement and equivalent plastic strain were in good agreement with the experimental work. with increasing welding speed, the distances from the hook tip to the top surface of the upper workpiece on the retreating side(RS) and the advancing side(AS) increase, while the distance between two wave-shaped alclads decreases. A symmetric interface bending is observed on the AS and the RS during plunging, while the interface bending on the AS is bigger than that on the RS during welding. The peak temperature of the interface on the AS is higher than that on the RS. The equivalent plastic strain gradually increases as the distance to the weld center decreases, and its peak value is obtained near the bottom of the weld.

关键词： Stationary shoulder friction stir lap welding coupled Eulerian-Lagrangian Temperature field Material distribution Equivalent plastic strain

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中国142座历史文化名城空间分布数据集

全球变化数据学报（中英文） 2024年第1期8卷 76-81,V0076-V0081页

作者：彭建章汤擘张扬官倩娇熊宇宸张庆铭陈纬成都理工大学地理与规划学院成都610059 东南大学建筑学院南京210000

国家历史文化名城是指保存文物特别丰富、具有重大历史文化价值和革命意义的城市,因其深厚的历史文化底蕴,而具有极高的文化、科学和保护价值。基于国务院1982年、1986年、1994年先后公布的三批国家历史文化名城名单和后续增补的历史文... 详细信息

国家历史文化名城是指保存文物特别丰富、具有重大历史文化价值和革命意义的城市,因其深厚的历史文化底蕴,而具有极高的文化、科学和保护价值。基于国务院1982年、1986年、1994年先后公布的三批国家历史文化名城名单和后续增补的历史文化名城名单,截至2023年,全国共有142座国家历史文化名城。通过Google地图对142座城市的空间点位进行采集、编辑和验证,补充历史文化名城市级行政区名称、类别和省级行政区名称、类别等属性信息,使用ArcGIS软件进行数据入库,形成中国142座历史文化名城空间分布数据集。该数据集内容包括:中国142座国家历史文化名城的名称、批次、市级行政区名称、市级行政区类别、省级行政区名称、省级行政区类别等信息。数据集以.shp和.xlsx格式存储,由9个数据文件组成,数据量为178 Kb(压缩为1个文件,26.7 Kb)

关键词：历史文化名城空间分布数据集中国

Precipitation on stacking faults in Mg–9.8wt%Sn alloy

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Journal of Materials Science & Technology 2020年第10期42卷 230-240页

作者： c.q.Liu c.He H.w.chen J.f.Nie International Joint Laboratory for Light Alloys(Ministry of Education) College of Materials Science and EngineeringChongqing UniversityChongqing400044China Department of Materials Science and Engineering Monash UniversityVictoria3800Australia Electron Microscopy center Chongqing UniversityChongqing400044PR China

In this work,we have systematically investigated precipitation ofβ’-Mg3Sn phase on intrinsic stacking faults I1 and I2 in a Mg-9.8 wt%Sn alloy using aberration-corrected scanning transmission electron *** observed I1 faults are generated by the dissociation of c+a perfect dislocations and bounded by frank partial dislocations having a Shockley *** ofβ’on I1 involves a shear of 1/3α,similar to its formation directly from theα-Mg ***β’phase often nucleates at one end of an I1 fault due to the interaction between shear strain fields ofβ’and the Shockley component of the frank partial at that end,and subsequently grows towards the other end of the *** theβ’reaches to the other end,the Shockley partial bounding the lengthening end of theβ’reacts with the frank partial bounding the fault,generating an a perfect dislocation that can glide away from the precipitate and the *** observed I2 faults are generated by the dissociation of a perfect dislocations and bounded by Shockley *** ofβ’on I2 does not need a shear of 1/3α,since the pre-existing I2 fault already provides an AbcA four-layer structure ofβ’.Thickening of theβ’that has already formed on the I2 involves the successive occurrence of three crystallographically equivalent shears of 1/3αon every second(0002)αplane of theα-Mg *** this thickening mechanism is similar to that of theβ’formed directly from theα-Mg matrix,an a perfect dislocation will be produced when theβ’is thickened to eight layers,and it can again glide away from the precipitate and the fault.

关键词： Heterogeneous precipitation HAADf-STEM Shockley partial dislocation frank partial dislocation Dislocation reaction

Ground-based and additional science support for SMILE

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Earth and Planetary Physics 2024年第1期8卷 275-298页

作者： J.A.carter M.Dunlop c.forsyth K.Oksavik E.Donovon A.Kavanagh S.E.Milan T.Sergienko R.c.fear D.G.Sibeck M.connors T.yeoman X.Tan M.G.G.T.Taylor K.Mcwilliams J.Gjerloev R.barnes D.D.billet G.chisham A.Dimmock M.P.freeman D.-S.Han M.D.Hartinger S.-y.w.Hsieh Z.-J.Hu M.K.James L.Juusola K.Kauristie E.A.Kronberg M.Lester J.Manuel J.Matzka I.Mccrea y.Miyoshi J.Rae L.Ren f.Sigernes E.Spanswick K.Sterne A.Steuwer T.Sun M.-T.walach b.walsh c.wang J.weygand J.wild J.yan J.Zhang q.-H.Zhang Planetary Sciences Group School of Physics and AstronomyUniversity of LeicesterUniversity RoadLeicesterLE17RHUK Rutherford Appleton Laboratory Space Science Technology Facilities CouncilOxfordshireUK School of Space and Environment Beihang UniversityBeijing 100191China Key Laboratory of Space Environment Monitoring and Information Processing Ministry of Industry and Information TechnologyBeijing 100017China Department of Space and climate Physics UCLMullard Space Science LaboratoryHolmbury St.MaryDorkingSurreyRH56NTUK birkeland centre for Space Science Department of Physics and Technology.University of BergenBergenNorway Department of Physics and Astronomy University of Calgary2500 University DriveCalgaryAlbertaCanada T2N 1N4 british Antarctic Survey CambridgeUK Swedish Institute of Space Physics KirunaSweden west Highfield campus University of SouthamptonUniversity RoadSO171BJUK Goddard Space flight center NASAGreenbeltMarylandUSA Athabasca University AthabascaCanada ESTEc European Space AgencyNetherlands University of Saskatchewan SaskatoonCanada The Johns Hopkins University Applied Physics Laboratory LaurelMarylandUSA Swedish Institude of Space Physics UppsalaSE 75121Sweden Tongji University Shanghai 200092China center for Space Plasma Physics Space Science Institute4765 Walnut Street Suite BBoulderColorado80301USA Polar Research Institute of china Shanghai 200136China finnish Meteorological Institute(fMI) Finland Department of Earth and Environmental Sciences(Geophysics) Ludwig Maximilian University of Munich(LMU)MunichTheresienstr.41MunichD-80333Germany canadian Space Agency MontrealCanada GfZ German Research centre for Geosciences PotsdamGermany Nagoya University Institute for Space Earth Environment ResearchCenter for Integrated Data ScienceNagoyaAichiJP 464-8601 Northumbria University Newcastle upon TyneTyne and WearUK NE18ST National Space Science center Chinese Academy SciencesBeijing 100190China Arctic Geophysics University Centre in Svalbard

The joint European Space Agency and chinese Academy of Sciences Solar wind Magnetosphere Ionosphere Link Explorer(SMILE)mission will explore global dynamics of the magnetosphere under varying solar wind and interplanetary magnetic field conditions,and simultaneously monitor the auroral response of the Northern Hemisphere *** these large-scale responses with medium and fine-scale measurements at a variety of cadences by additional ground-based and space-based instruments will enable a much greater scientific impact beyond the original goals of the SMILE ***,we describe current community efforts to prepare for SMILE,and the benefits and context various experiments that have explicitly expressed support for SMILE can offer.A dedicated group of international scientists representing many different experiment types and geographical locations,the Ground-based and Additional Science working Group,is facilitating these *** include constructing an online SMILE Data fusion facility,the discussion of particular or special modes for experiments such as coherent and incoherent scatter radar,and the consideration of particular observing strategies and spacecraft *** anticipate growing interest and community engagement with the SMILE mission,and we welcome novel ideas and insights from the solar-terrestrial community.

关键词： magnetosphere ionosphere magnetosphere-ionosphere coupling ground-based experimentation SMILE conjunctions missions

further investigation on the fusion of ^(6)Li with ^(209)bi target at near-barrier energies

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chinese Physics c 2024年第7期48卷 106-117页

作者：张高龙焦振威张广鑫 M.R.cortes 胡世鹏钱建强 D.Mengoni 屈卫卫李聪博郑云张焕乔孙慧斌王楠张春雷 J.J.Valiente-Dobón D.Testov M.Mazzocco A.Gozzelino c.Parascandolo D.Pierroutsakou M.La commara A.Goasduff D.bazzacco D.R.Napoli f.Galtarossa f.Recchia A.Illana S.bakes I.Zanon S.Aydin G.de Angelis M.Siciliano R.Menegazzo S.M.Lenzi J.L.ferreira J.Rangel Serkan Akkoyun L.f.canto J.Lubian School of Physics Beihang UniversityBeijing 100191China Sino-french Institute of Nuclear Engineering and Technology Sun Yat-Sen UniversityZhuhai 519082China Instituto de física Universidade Federal Fluminense24210-340NiteróiRio de JaneiroBrazil Institute for Advanced Study in Nuclear Energy&Safety Shenzhen UniversityShenzhen 518060China Shenzhen Key Laboratory of Research and Manufacture of High Purity Germanium Materials and fetectors Shenzhen UniversityShenzhen 518060China INfN Sezione di PadovaPadovaItaly Dipartimento di fisica Astronomia dell'Universita di padova PadovaItaly State Key Laboratory of Radiation Medicine and Protection School of Radiation Medicine and ProtectionSoochow UniversitySuzhou 215123China china Institute of Atomic Energy Beijing 102413China The Key Laboratory of beam Technology and Material Modification of Ministry of Education College of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875China INfN Laboratori Nazionali di LegnaroI-35020 LegnaroItaly INfN Sezione di NapoliI-80126 NapoliItaly Dipartimento di farmacia Universitàdi Napoli"Federico II"I-80131 NapoliItaly Department of Natural and Mathematical Sciences Faculty of EngineeringTarsus University33480 MersinTurkiye Physics Division Argonne National LaboratoryLemont-ILUSA Departamento de Matemaética Física e Computaç˜ao Universidade do Estado do Rio de JaneiroFaculdade de Tecnologia27537-000ResendeRio de JaneiroBrazil Department of Physics Sivas Cumhuriyet UniversitySivasTurkey Instituto de física Universidade Federal do Rio de JaneiroCP 6852821941-972Rio de JaneiroBrazil

The complete and incomplete fusion cross sections for ^(6)Li+^(209)bi were measured using the in-beamγ-ray method around the coulomb *** cross sections of(deuteron captured)incomplete fusion(Icf)products were re-quantified experimentally for this reaction *** results reveal that the Icf cross section is equivalent to that of complete fusion(cf)above the coulomb barrier and dominant near or below the coulomb barrier.A theoretical calculation based on the continuum discretized coupled channel(cDcc)method was performed for the aforementioned cf and Icf cross sections;the result is consistent with the *** universal fusion function(Uff)was also compared with the measured cf cross section for different barrier parameters,demonstrating that the cf suppression factor is significantly influenced by the choice of potential,which can reflect both dynamic and static effects of breakup on the fusion process.

关键词： cross section incomplete fusion suppression factor weakly bound nuclei

ELEcTROcHEMIcAL NOISE ANALySIS Of THE INfLUENcE Of THE Zn^(2+)IONS cONcENTRATION ON ZINc ELEcTROPLATING

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Acta Metallurgica Sinica(English Letters) 2005年第2期18卷 137-144页

作者： Z.Zhang c.S.wu q.y.cai f.H.cao J.q.Zhang Departmentofchemistry ZhejiangUniversityHangzhou310027China Departmentofchemistry ZhejiangUniversityHangzhou310027China／／StateKeyLaboratoryforCorrosionandProtectionInstituteofMetalResearchTheChineseAcademyofSciencesShenyang110016China

The influence of the concentration of Zn2+ ions on zinc electroplating process was investigated by means of electrochemical noise (EN) and cyclic voltammetry methods in conjunction with the scanning electron microscopy (SEM) technique. It was found that the EN generated during the electroplating of dentritic or large polymeric zinc deposit has large potential oscillation amplitude and positive potential drift while the compact zinc deposit possesses small noise amplitude and little potential drift. with the change of rate determining step from diffusion-control through mixed-control to activation-control, the maximum relative energy obtained from wavelet analysis defined from the region with larger scales to those with smaller scales, and the EDP (relative energy distribution plot) can be us, as 'fingerprints' of EN to characterize the electroplating process and the deposit structure. The results also showed that electrochemical noise technique can give more information about the electrodeposit structure than other normal electrochemical measurements, such as linear potential sweep method and cyclic voltammetry technique.

关键词： zinc electroplating zinc ions concentration electrochemical noise electrodeposit structure

Enhanced oxidation resistance of ce by addition of Ga and nanocrystallization

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Journal of Materials Science & Technology 2023年第16期147卷 26-36页

作者： T.S.Liang y.f.Jiang H.y.Li w.wang q.Zhang b.Zhang Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China The 404 company Limited China National Nuclear CorporationLanzhou 732850China State Key Laboratory of Material Processing and Die&Mould Technology School of Material Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China

ce is prone to catastrophic oxidation at room temperature and its oxidation resistance is difficult to be improved by ***,we found that the oxidation resistance of active metal ce can be significantly improved by the addition of 20 at.%*** ion beam lift-out technique and scanning transmission electron microscopy analysis disclosed that a discontinuous Ga-rich layer was generated beneath the oxide layer in the coarse-grained ce-Ga *** Ga-rich layer formed by selective oxidation of ce acts as a diffusion barrier for ce outward diffusion and ceases the O/M interfacial reaction when a critical concentration of Ga(75 at.%)is *** nanocrystallization,uniform distribution of Ga was *** oxidation,a relatively continuous Ga-rich layer was formed which further enhanced the oxidation *** introduction of noble elements combining with nanocrystallization may provide a novel strategy for the protection of metals with high activity and poor oxidation resistance.

关键词： ce-Ga alloy Oxidation resistance Diffusion barrier Nanocrystallization

Nonlinear corrections for the nuclear gluon distribution in eA processes

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chinese Physics c 2024年第3期48卷 52-64页

作者： G.R.boroun b.Rezaei f.Abdi Department of Physics Razi UniversityKermanshah 67149Iran.

An analytical study with respect to the nonlinear corrections for the nuclear gluon distribution function in the next-to-leading order approximation at small x is *** consider the nonlinear corrections to the nuclear gluon distribution functions at low values of x and q^(2) using the parametrization f_(2)(x,q^(2))and the nuclear modification factors obtained from the Khanpour-Soleymaninia-Atashbar-Spiesberger-Guzey *** cT18 gluon distribution is used for the baseline proton gluon density at q^(2)_(0)=*** discuss the behavior of the gluon densities in the next-to-leading order and the next-to-next-to-leading order approximations at the initial scale q^(2)_(0),as well as the modifications due to the nonlinear *** find that the qcD nonlinear corrections are more significant for the next-to-leading order accuracy than the next-to-next-to-leading order for light and heavy *** results of the nonlinear GLR-Mq evolution equation are similar to those obtained with the Rausch-Guzey-Klasen gluon upward and downward evolutions within the *** magnitude of the gluon distribution with the nonlinear corrections increases with a decrease in x and an increase in atomic number A.

关键词： gluon distribution nonlinear corrections light and heavy nuclei low x physics

characterization of face-centered cubic structure and deformation mechanisms in high energy shot peening process of Tc17

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Journal of Materials Science & Technology 2022年第15期110卷 136-151页

作者： c.yang M.q.Li y.G.Liu School of Materials Science and Engineering Northwestern Polytechnical UniversityXi’an 710072China

The face-centered cubic structure(fcc)and its deformation behaviors,as well as the distinctive role of fcc-Ti in nanocrystallization in Tc17 subjected to high energy shot peening(HESP),were investigated by using comprehensive high-resolution transmission electron microscopy(HRTEM).The results showed that there was a stress-induced fcc-Ti in Tc17 with a lattice constant of 0.420–0.433 nm and the b-type orientation relationship between the hcp-Ti and the fcc-Ti as[2-1-10]_(hcp)//[-110]_(fcc)and(0001)_(hcp)//(111)_(fcc),which was accomplished by the gliding of Shockley partial dislocations with burgers vector of 1/3[01-10]on the basal *** deformation twinning dominated the subsequent deformation of fcc-Ti,producing two types ofctwins with different *** them,the I-type twin with complete structure was generated by successive gliding of Shockley partial dislocations with the same burgers vector of 1/6[11-2].In contrast,the cooperative slip of three Shockley partials,whose sum of burgers vectors was equal to zero,produced the II-type twin with zero net macroscopic *** then,the emission of Shockley partial with the burgers vector of 1/6[11-2]on every three(111)fccplanes resulted in the formation of a 9R *** to the dissociation effect of lamellar fcc-Ti and the superior deformation ability of fcc structure,the occurrence of fcc-Ti effectively promoted surface nanocrystallization of Tc17.

关键词： Tc17 Severe plastic deformation Stress-induced phase transformation Deformation twinning Nanocrystallization

Linking discrete particle simulation to continuum process modelling for granular matter: Theory and application

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Particuology 2011年第4期9卷 342-357页

作者： H.P. Zhu Z.y. Zhou q.f. Hou A.b. yu School of Engineering University of Western Sydney Locked Bag 1797 Penrith NSW 2751 Australia Laboratory for Simulation and Mo-delling of Particulate Systems School of Materials Science and Engineering The University of New South Wales Sydney NSW 2052 Australia

Two approaches are widely used to describe particle systems： the continuum approach at macroscopic scale and the discrete approach at particle scale. Each has its own advantages and disadvantages in the modelling of particle systems. It is of paramount significance to develop a theory to overcome the disadvantages of the two approaches. Averaging method to link the discrete to continuum approach is a potential technique to develop such a theory. This paper introduces an averaging method, including the theory and its application to the particle flow in a hopper and the particle-fluid flow in an ironmaking blast furnace.

关键词： Particle flow Gas-solid flow Discrete approach Averaging method Hopper flow blast furnace