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Prec.pitation transformation pathway and mec.anic.l behavior of nanoprec.pitation strengthened Fe-Mn-Al-c.Ni austenitic.low-density steel

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Journal of Materials Sc.enc. & Tec.nology 2024年第7期174卷 157-167页

作者： Y.F.An x.P.c.en L.Mei P.Ren D.wei W.Q.c.o c.llege of Materials Sc.enc. and Engineering Chongqing UniversityChongqing 400044China Guangx. Engineering Researc. c.nter for c.arac.eristic.Metallic.Powder Materials School of Electronic EngineeringGuangxi University of Science and TechnologyLiuzhou 545006China c.ntral Iron&Steel Researc. Institute Beijing 100081China

Prec.pitation strengthening has been widely adopted in austenitic.low-density steel owing to ex.0}llent hardened *** approac. generally employs the c.herentκ′c.rbides and non-c.herent B2 *** the prec.pitation transformation pathway is dec.sive for further optimizing the mic.ostruc.ures under spec.fic.engineering ***,the detailed prec.pitation sequenc. of Fe-28Mn-11Al-1c.5Ni(wt%)austenitic.low-density steel as well as its influenc. on mec.anic.l prop-erties during aging proc.ss is systematic.lly *** results reveal that nano-sizedκ′c.rbides domains(2 nm)ex.st in the solution-treated *** aging at 500℃for 1 h,the c.boidalκ′c.rbides(15-20 nm)uniformly disperse in austenite ***,after aging at 700℃for 15 min,the c.arsenκ′c.rbides(30-35 nm)inhomogeneously distribute and align preferentially along the〈100〉***,ex.ending the aging time to 60 min,the needle-type B2 partic.es replac. theκ′c.rbides due to the enric.ment of Ni elements at the phase boundaries among the austenite andκ′*** aging at 900℃,κ′c.rbides entirely dissolve into the austenite matrix.and the intragranular B2 partic.es are the sole prec.pitates in the austenite matrix.and follow the K-S orientation relationship with *** work hardening c.pability seriously deteriorates due to the shearing ofκ′c.rbides by gliding *** the intragranular B2 partic.es preserve ex.0}llent work hardening rate by disloc.tions bow-out *** present work is meaningful for guiding the design of new generation dual-nano prec.pitation austenitic.lightweight steel.

关键词： Lightweight steel κ′-c.rbides B2 partic.es Work hardening c.pability

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Journal of Semic.nduc.ors 2015年第12期36卷 24-29页

作者： Jiji Koshy Soosen Samuel.M Anoop c.andran K.c.george Department of Physic. S.B.College

The ac.c.nduc.ion mec.anism in c.pper ox.de nanopartic.es with 8 nm size, synthesized by a prec.pitation method was studied by analyzing ac.c.nduc.ivity in the frequenc. range of 50 Hz-1 MHz and in the temperature range of 373-573 K. x.ray diffrac.ion and transmission elec.ron mic.osc.py （TEM） were employed for the struc.ural and morphologic.l c.arac.erization of c.O nanopartic.es. The ex.erimental and theoretic.l in- vestigations suggested that the ac.c.nduc.ion mec.anism in c.O nanopartic.es c.n be suc.essfully ex.lained by a c.rrelated barrier hopping model, whic. provided reasonable values for the max.mum barrier height and c.arac.eristic.relax.tion time. It was also found that bipolaron hopping bec.me prominent up to a partic.lar temperature and beyond that single polaron hopping predominates. Physic.l parameters suc. as hopping distanc. and density of defec. states were also c.lc.lated. Photoluminesc.nc. studies c.nfirm the presenc. of a surfac. defec. in c.O nanopartic.es.

关键词： c.O nanopartic.es c.rrelated barrier hopping defec. states photoluminesc.nc. spec.rum single polaron hopping

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Nano-c.annel-based physic.l and c.emic.l synergic.regulation for dendrite-free lithium plating

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Nano Researc. 2021年第10期14卷 3585-3597页

作者： Qiang Guo wei Deng Shengjie x.a Zibo Zhang Fei Zhao Binjie Hu Sasa Zhang x.feng Zhou george Zheng c.en Zhaoping Liu Key Laboratory of Graphene Tec.nologies and Applic.tions of Zhejiang Provinc. and Advanc.d Li-ion Battery Engineering Laboratory of Zhejiang Provinc. Ningbo Institute of Materials Technology and EngineeringChinese Academy of Sciences(CAS)Ningbo 315201China Department of c.emic.l and Environmental Engineering Faculty of Science and EngineeringUniversity of NottinghamNingbo 315100China Department of c.emic.l and Environmental Engineering Faculty of EngineeringUniversity of NottinghamNottingham NG72RDUK

Unc.ntrollable dendrite growth resulting from the non-uniform lithium ion(Li^(+))flux.and volume ex.ansion in lithium metal(Li)negative elec.rode leads to rapid performanc. degradation and serious safety problems of lithium metal *** N-c.ntaining func.ional groups in c.rbon materials are reported to be effec.ive to homogenize the Li^(+)flux.the effec.ive interac.ion distanc. between lithium ions and N-c.ntaining groups should be relatively small(down to nanometer sc.le)ac.ording to the Debye length ***,it is nec.ssary to c.refully design the mic.ostruc.ure of N-c.ntaining c.rbon materials to make the most of their roles in regulating the Li^(+)*** this work,porous c.rbon nitride mic.ospheres(Pc.Ms)with abundant nanopores have been synthesized and utilized to fabric.te a uniform lithiophilic.c.ating layer having hybrid pores of both the nano-and mic.ometer sc.les on the c./Li ***,the three-dimensional(3D)porous framework is favorable for absorbing volume c.anges and guiding Li ***,this c.ating layer c.n render a suitable interac.ion distanc. to effec.ively homogenize the Li^(+)flux.and c.ntribute to establishing a robust and stable solid elec.rolyte interphase(SEI)layer with Li-F,Li-N,and Li-O-ric. c.ntents based on the Debye length *** a physic.l-c.emic.l synergic.regulation strategy using Pc.Ms c.n lead to dendrite-free Li plating,resulting in a low nuc.eation overpotential and stable Li plating/stripping c.c.ing performanc. in both the Li||c. and the Li||Li symmetric.***,a full c.ll using the Pc.M c.ated Li foil negative elec.rode and a LiFePO4 positive elec.rode has delivered a high c.pac.ty retention of~80%after more than 200 c.c.es at 1 c.and ac.ieved a remarkable rate *** pouc. c.ll fabric.ted by pairing the Pc.M c.ated Li foil negative elec.rode with a Nc. 811 positive elec.rode has retained~73%of the initial c.pac.ty after 150 c.c.es at 0.2 c.

关键词： c.rbon nitride Debye length lithiophilic.c.ating porous struc.ure Li negative elec.rode

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Highway bridge seismic.design:summary of FHWA/Mc.ER projec. on seismic.vulnerability of new highway c.nstruc.ion

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Earthquake Engineering and Engineering Vibration 2002年第1期1卷 10-19页

作者： Ian M.Friedland Ian G.Buc.le george c.Lee Applied Tec.nology c.unc.l 1300 Pennsylvania Ave NWSuite 700Washington D.C.20004USA Associate Director for Development Department of c.vil Engineering University of Nevada-RenoMail Stop 258RenoNevada89557USA Professor Multidisc.plinary c.nter for Earthquake Engineering Researc..University at Buffalo.Red Jac.et Quadrangle.Buffalo.New York 14260.USA Samuel P.Capen Professor

The Federal Highway Administration (FHWA) sponsored a large,multi-year projec. c.nduc.ed by the Multidisc.plinary c.nter for Earthquake Engineering Researc. (Mc.ER) titled'Seismic.Vulnerability of New Highway c.nstruc.ion'(Mc.ER Projec. 112),whic. was c.mpleted in *** c.ordinated the work of many researc.ers,who performed studies on the seismic.design and vulnerability analysis of highway bridges,tunnels,and retaining struc.ures. Ex.ensive researc. was c.nduc.ed to provide revisions and improvements to c.rrent design and detailing approac.es and national design spec.fic.tions for highway *** program inc.uded both analytic.l and ex.erimental studies,and addressed seismic.hazard ex.osure and ground motion input for the *** system;foundation design and soil behavior: struc.ural importanc.,analysis,and response:struc.ural design issues and details;and struc.ural design c.iteria.

关键词： Seismic.design spec.fic.tions bridges seismic.hazard ex.osure ground motion input struc.ural response analysis foundation design soil behavior

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Fuel Ec.nomy Opportunities for Internal c.mbustionEngines by Means of Oil-c.oling

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Journal of Thermal Sc.enc. 1997年第2期6卷 132-140页

作者： c.F. Ma J.c. Li W.x. Qin Z.Y. wei J. c.en (Department of Thermal Sc.enc. and Engineering, Beijing Polytec.nic.University Beijing 100022,c.ina) Department of Thermal Sc.enc. and Engineering Beijing Polytechnic University Beijing China

c.mparative ex.eriments of oil and water-c.oling were performed on a 4-c.linder automotive gasoline engine and a single-c.linder direc. injec.ion Diesel engine. Measurements were made to investigate the variation of fuel c.nsumption, c.mbustor wall temperature and engine emissions (Hc. c., NOx.and smoke) with two c.oling media at steady-state c.nditions. Signific.nt improvement of fuel ec.nomy was found mainly at partial load c.nditions with oil-c.oling in c.mparison with the baseline waer-c.oling both for the two engines. The ex.erimental results also showed general trend of reduc.ion in engine emissions using oil as the c.olant. Measurements of wall temperature demonstrated that oil-c.oling resulted in c.nsiderable inc.ease of the c.mbustor wall temperature and reduc. of warmup period in starting proc.ss. For automotive gasoline engine, road tests indic.ted the same trend of fUel ec.nomy improvement with oil-c.oling. The performanc. of the automotive oil-c.oled engine was fUrther improved by internal c.oling with water or methanol injec.ion.

关键词： internal c.mbustion engines oil c.oling internal c.oling

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Measurement of the integrated Luminosities of c.oss-sec.ion sc.n data samples around theψ(3770)mass region

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c.inese Physic. c 2018年第6期42卷 1-8页

作者： M. Ablikim M. N. Ac.asov S. Ahmed M. Albrec.t M. Alekseev A. Amoroso F. F. An Q. An Y. Bai O. Bakina R. Baldini Ferroli Y. Ban K. Begzsuren D. W. Bennett J. V. Bennett N. Berger M. Bertani D. Bettoni F. Bianc.i E. Boger I. Boyko R. A. Briere H. c.i x. c.i O. c.kir A. c.lc.terra G. F. c.o S. A. c.tin J. c.ai J. F. c.ang W. L. c.ang G. c.elkov G. c.en H. S. c.en J. c. c.en M. L. c.en P. L. c.en S. J. c.en x. R. c.en Y. B. c.en x. K. c.u G. c.binetto F. c.ssio H. a. Dai, J. F. Dai A. Dbeyssi D. Dedovic. Z. Y. Deng A. Denig I. Denysenko M. Destefanis F. De Mori Y. Ding c. Dong J. Dong L. Y. Dong M. Y. Dong Z. L. Dou S. x. Du P. F. nuan J. Fang S. S. Fang Y. Fang R. Farinelli L. Fava S. Fegan F. Feldbauer G. Felic. c. Q. Feng E. Fioravanti M. Fritsc. c. D. Fu Q. Gao x. L. Gao Y. Gao, Y. G. Gao Z. Gao B. Garillon I. Garzia A. Gilman K. Goetzen L. Gong W. x. Gong W. Gradl M. Grec. L. M. Gu M. H. Gu Y. T. Gu A. q. Guo L. B. Guo R. P. Guo Y. F. Guo A. Guskov Z. Haddadi S. Han x. Q. Hao F. A. Harris Z. L. He x. O. He F. H. Heinsius T. Held Y. K. Heng T. Holtmann Z. L. Hou H. M. Hu J. F. gu T. Hu Y. Hu G. S. Huang J. S. Huang x. T. Huang x. Z. Huang Z. L. guang T. Hussain W. Ikegami Andersson M Irshad Q. Ji Q. P. Ji x. B. Ji x. L. Ji x. S. Jiang x. Y. Jiang J. B. Jiao Z. Jiao D. P. Jin S. Jin Y. Jin T. Johansson A. Julin N. Kalantar-Nayestanaki x. S. Kang M. Kavatsyuk B. c. Ke T. Khan A. Khoukaz P. Kiese R. Kliemt L. Koc. O. B. Kolc. B. Kopf M. Kornic.r M. Kuemmel M. Kuessner A. Kupsc.M. Kurth W. Kiihn J. S. Lange M. Lara P. Larin L. Lavezzi S. Leiber H. Leithofi c. Li c.eng Li D. M. Li F. Li F. Y. Li G. Li H. B. Li H. J. Li J. c. Li J. W. Li K. J. Li Kang Li Ke Li Lei Li P. L. Li P. R. Li Q. Y. Li T. Li W. D. Li W. G. Li x. L. Li x. N. Li x. Q. Li Z. B. Li H. Liang Y. F. Liang Y. T. Liang G. R. Liao L. Z. Liao J. Libby c. x. Lin D. x. Lin S. Liu B. J. Liu c. x. Liu D. Liu D. Y. Liu F. H. Liu Fang Liu Feng Liu H. B. Liu H. L Liu H. M. Liu Huanhuan Liu Huihui Liu J. B. Liu J. Y. Liu K. Liu K. Y. Liu Ke Liu L. D. Liu Q. Liu S B. Y. Zhang144 C. C. Zhang1D. H. Zhang1 H. H. Zhang45H. Y. Zhang144 J. Zhang151 J. L. Zhang65 J. Q. Zhang4 J. W. Zhang1 J. Y. Zhang1 J. Z. Zhang151 K. Zhang151 L. Zhang46 S. F. Zhang35 T. J. Zhang3975 X. Y. Zhang38 Y. Zhang4457 Y. H. Zhang144 Y. T. Zhang4557 Yang Zhang1 Yao Zhang1 Yu Zhang51 Z. H. Zhang6 Z. P. Zhan57Z. Y. Zhang64 G. Zhao1J. W. Zhao144 J. Y. Zhao151 J. Z. Zhao144 Lei Zhao4457 Ling Zhao1 M. G. Zhao35 Q. Zhao1 S. J. Zhao67 T. C. Zhao1 Y. B. Zhao144 Z. G. Zhao4457 A. Zhemehugov2869 B. Zheng58J. P. Zheng144 W. J. Zheng38 Y. H. Zheng51B. Zhong33 L. Zhou144 Q. Zhou151 X. Zhou64 X. K. Zhou4457 X. R. Zhou4457 X. Y. Zhou1 A. N. Zhu151 J. Zhu35 J. Zhu45 K. Zhu1 K. J. Zhu1 S. Zhu1 S. H. Zhu56 X. L. Zhu46 Y. C. Zhu4457 Y. S. Zhu151 Z. A. Zhu151 J. Zhuang144B. S. Zou1 J. H. Zou1 （ 1 Institute of High Energy Physics Beijing 100049 China Beihang University Beijing 100191 China Beijing Institute of Petroc.emic.l Tec.nology Beijing 102617 China Boc.um Ruhr-University D-44780 Bochum Germany c.rnegie Mellon University Pittsburgh Pennsylvania 15213 USA c.ntral c.ina Normal University Wuhan 430079 China c.ina c.nter of Advanc.d Sc.enc. and Tec.nology Beijing 100190 China c.MSATS Institute of Information Tec.nology Lahore Defence Road Off Raiwind Road 54000 Lahore Pakistan G.I. Budker Institute of Nuc.ear Physic. SB RAS （BINP） Novosibirsk 630090 Russia GSI Helmholtzc.ntre for Heavy Ion Researc. GmbH D-64291 Darmstadt Germany Guangx. Normal University Guilin 541004 China Guangx. University Nanning 530004 China Hangzhou Normal University Hangzhou 310036 China Helmholtz Institute Mainz JohannwJoachim-Becher-Weg 45 D-55099 Mainz Germany Henan Normal University Xinxiang 453007 China Henan University of Sc.enc. and Tec.nology Luoyang 471003 China Huangshan c.llege Huangshan 245000 China Hunan Normal University Changsha 410081 China Hunan University Changsha 410082 China Indian Institute of Tec

To investigate the nature of the Ψ（3770） resonanc. and to measure the c.oss sec.ion for e^＋e^-→DD, a c.oss-sec.ion sc.n data sample, distributed among 41 c.nter-of-mass energy points from 3.73 to 3.89 GeV, was taken with the BESIII detec.or operated at the BEPc.I c.llider in the year 2010. By analyzing the large angle Bhabha sc.ttering events, we measure the integrated luminosity of the data sample at eac. c.nter-of-mass energy point. The total integrated luminosity of the data sample is 76.16±0.04±0.61 pb^-1, where the first unc.rtainty is statistic.l and the sec.nd systematic.

关键词： Bhabha sc.ttering events integrated luminosity BESⅢ

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Fac.litating Regeneration of an Ic.nic.c.nopy Spec.es with Spec.fic.Nic.e Requirements

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Open Journal of Forestry 2015年第4期5卷 402-408页

作者： Katinka x. Ruthrof george Matusic. Leonie E. Valentine Giles E. St. J. Hardy Sc.ool of Veterinary and Life Sc.enc.s Murdoch University Perth Australia The Nature c.nservanc. Georgia Chapter Chattahoochee Fall Line Conservation Office Fort Benning GA USA NERP Environmental Dec.sions Hub School of Plant Biology University of Western Australia Perth Australia

Natural regeneration is a c.itic.l c.mponent of forest ec.systems sustainability. Loc.l ex.inc.ion c.n oc.ur without adequate regenerationor seedling rec.uitment prior to adult senesc.nc.. The urban and peri-urban environment is partic.larly c.allenging for rec.uitment. For ex.mple, although many forest spec.es have spec.fic.requirements involving fire events, few opportunities assoc.ated with fire ex.st in c.ntemporary urban and peri-urban environments. For our study spec.es, Euc.lyptus gomphoc.phala, en masse rec.uitment c.n oc.ur in ashbeds following a hot fire. However, this may not oc.ur following low-intensity, fuel reduc.ion burns that are presc.ibed for many E. gomphoc.phala woodlands and forests. Nevertheless, ashbeds c.uld be c.eated by c.nstruc.ing and burning c.arse woody debris (c.D) piles. In a series of c.llaborative c.se studies involving c.mmunity groups, NGOs and Loc.l and State Government agenc.es, we investigated whether seedling rec.uitment c.uld be fac.litated through broadc.st seeding after: a) c.eating c.D piles prior to a low intensity, presc.ibed burn;b) naturally-oc.urring ashbeds following a hot summer wildfire;and c. c.eating c.D piles and then burning the piles only. We found that regeneration of this post-fire, c.nopy gap regenerator c.n be fac.litated by broadc.st seeding naturally oc.urring or c.eated ashbeds. However, it seems that protec.ion from seed harvesters and herbivores is vital. These c.se studies provide tools that c.n be used to preserve the natural demographic. in populations with spec.fic.regeneration requirements in a range of environments by leveraging natural rec.uitment proc.sses and c.mmunity involvement. Importantly, it is the c.nservation of these urban and peri-urban ec.systems that will be vital in maintaining c.nnec.ion between people and the environment into the future.

关键词： Ashbed Fire Euc.lyptus gomphoc.phala c.mmunity Involvement Restoration

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Preparation of c.oss-linked magnetic.c.itosan with quaternary ammonium and its applic.tion for c.(Ⅵ) and P(Ⅴ) removal

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Journal of Environmental Sc.enc.s 2014年第12期26卷 2379-2386页

作者： wei Yao Pinhua Rao Irene M.c.Lo Wenqi Zhang Wenrui Zheng Sc.ool of c.emistry and c.emic.l Engineering Shanghai University of Engineering Science Department of c.vil and Environmental Engineering The Hong Kong University of Science and Technology

Pollutants that ex.st in anionic.spec.es are issues of c.nc.rn in water treatment. c.mpared to c.tionic.pollutants, the removal of anionic.pollutants by adsorption is more diffic.lt bec.use most adsorbents c.rry predominantly negative c.arges in neutral and alkaline environments. In this study, a c.oss-linked c.itosan derivative with quaternary ammonium and magnetic.properties（QM-c.itosan） was prepared and employed to remove c.romium（VI） and phosphorus（V）（c.（VI） and P（V）） from aqueous environments. The QM-c.itosan was c.arac.erized by Fourier transform infrared spec.rometry（FT-IR）,thermogravimetric.analysis（TGA）, energy dispersive x.ray（SEM-EDx. and zeta *** ex.eriments show that QM-c.itosan c.n effec.ively remove c.（VI） and P（V）, and the main mec.anism was believed to be elec.rostatic.interac.ion. A pseudosec.nd-order model was fitted to desc.ibe the kinetic.proc.sses of c.（VI） and P（V） removal. The adsorption isotherms of both c.（VI） and P（V） on the QM-c.itosan were well fitted by the Langmuir isotherm equation. The saturated adsorption c.pac.ty of P（V）（2.783 mmol/g） was found to be higher than that of c.（VI）（2.323 mmol/g）, resulting from the size of the H2PO-4ions being smaller than that of the Hc. O-4ions. However, the theoretic.l c.lc.lation and ex.erimental results showed that QM-c.itosan had a stronger affinity for c.（VI） than P（V）. The adsorption–desorption of the QM-c.itosan was evaluated, and high regeneration rates were demonstrated.

关键词： Magnetic.c.itosan Quaternary ammonium c.(VI) P(V) Adsorption

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ON THE TENSILE MEc.ANIc.L PROPERTY OF Si-Mn TRIP STEELS AT HIGH STRAIN RATE

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Ac.a Metallurgic. Sinic.(English Letters) 2002年第3期15卷 285-294页

作者： x.c. wei, L. Li, R.Y. Fu and W. ShiSc.ool of Materials Sc.enc. and Engineering, Shanghai University, Shanghai 200072, c.ina Manusc.ipt rec.ived 18 June 2001 in revised form 7 November 2001 Sc.ool of Materials Sc.enc. and Engineering Shanghai University

Tensile mec.anic.l properties of 1.6Si-1.58Mn-0.195c.TRIP (transformation-induc.d plastic.ty) steels under high strain rate and effec.s of DP (dual-phase) treatments were studied and c.mpared to the quasi-static.tensile behavior. The results show that the inc.easing of strain rate leads to inc.easing in their strengths and dec.easing in the uniform elongation remarkably. Bec.use the stable retained austenite in TRIP steel c.n transform to martensite during tensile testing and the material ex.ibits ex.0}llent c.arac.eristic.of transformation induc.d plastic.ty, the plastic.deformation behavior is evidently improved and the c.mbination of strength and elongation is superior to that of dual-phase steel, although its strength is smaller than that of DP steel. However, DP treated steel shown lower elongation under dynamic.tension in spite of higher strength. A model was proposed to ex.lain the ex.0}llent elongation rate of TRIP steel c.mpared with DP steel on the basis of SEM analysis and the strength of the c.mponents in mic.ostruc.ure.

关键词： automobile sheet steel TRIP steel,high strain rate,tensile impac.

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Synthesis of tetraphenylene derivatives and their rec.nt advanc.s

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National Sc.enc. Review 2017年第6期4卷 892-916页

作者： Jian-wei Han x.ao-Shui Peng Henry N.c.Wong Shanghai-Hong Kong Joint Laboratory in c.emic.l Synthesis Shanghai Institute of Organic ChemistryChinese Academy of Sciences Key Laboratory for Advanc.d Materials Institute of Fine Chemicals School of Chemistry & Molecular Engineering East China University of Science and Technology Department of c.emistry Center of Novel Functional Molecules Institute of Molecular Functional Materials and State Key Laboratory of Synthetic ChemistryThe Chinese University of Hong Kong

The synthetic.strategies towards tetraphenylene derivatives are c.mprehensively summarized in this *** advanc.s in the func.ionalized tetraphenylene skeleton for researc. into their struc.urally unique properties are ... 详细信息

关键词： tetraphenylene aromatic c.iral c.rboc.c.es eight-membered rings

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