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Effect of Heat Input on the m.cros.ructure and Properties.of Dis.im.lar Weld joint Between Incoloy 28 and s.peraus.enitic s.ainles. s.eel

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Acta m.tallurgica s.nica(Englis. Letters. 2014年第2期27卷 259-266页

作者： m.s.abdel Rahm.n N.A.abdel Raheem.m.R.El Kous.y Departm.nt of m.tallurgy Faculty of EngineeringCairo University

Abs.ract This.work focus.s.on s.udying the effect of welding heat input within the range from.1 to 5 kj/m. on the m.cros.ructure and the corres.onding m.chanical and corros.on properties.of dis.im.lar joint between s.peraus.enitic s.ainles. s.eel （UNs.s.1254） and Incoloy 28 （UNs.N08028）. The two m.terials.were butt-welded with ER NiCrm.3. The m.tallurgical changes.as.ociated with welding of s.s. and Incoloy 28 were s.udied us.ng optical m.cros.ope, s.m. and EDX. The m.chanical and corros.on properties.were inves.igated us.ng tens.le tes., Vickers.hardnes. tes., and pitting and crevice corros.on tes.s. The weld m.tal m.cros.ructure s.owed precipitates.with needle-like s.ape at 3 and 5 kj/m.. Als., the m.cros.ructure s.owed unm.xed zone （Um.） at the fus.on line of both s.s. and Incoloy 28 s.des.at all the inves.igated heat inputs. The m. m.cros.gregation within Um. at Incoloy 28 s.de increas.d as.the heat input increas.d from.1 to 5 k j/ram.but that in s.s. increas.d with increas.ng heat input from.1 to 3 kj/m. and then decreas.d with increas.ng from.3 to 5 kj/m.. The ultim.te tens.le s.rengths.for all s.ecim.ns.at all the inves.igated heat inputs.are acceptable. The average hardnes. noticeably changed in weld m.tal as.the heat input increas.d from.1 to 5 kj/m.. Other zones.s.ch as.HAZ or Um. did not dem.ns.rate m.rked changes.in the average hardnes.. The pitting and crevice corros.on rates.of the weld joint were found s.gnificant at l and 3 kj/m. but ins.gnificant at 5 kj/m. according to As.m.G48.

关键词： s.peraus.enitic Incoloy 28 Welding Heat input Unm.xed zone m.cros.gregation Corros.on

Elem.ntal analys.s.of s.m. Egyptian ores.and indus.rial iron s.m.les.by neutron activation analys.s

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journal of Environm.ntal s.iences 2001年第1期13卷 115-118页

作者： A.s.ror N.abdel Bas.et A.s.abdel Haleem.A.m.Has.an Nuclear Phys.cs.Lab. Physics DepartmentFaculty of GirlsAin Shams UniversityCairoEgypt Environm.ntal Radioative Pollution Departm.nt Hot Laboratories CentreAEACairoEgypt

Elem.ntal analys.s.of iron ore s.m.les.and firs. indus.rial iron production prepared by the Egyptian Iron and s.eel Com.any of Helwan near Cairo were determ.ned by ins.rum.ntal neutron activation analys.s.technique. Five s.m.les.from.each kind were irradiated for a 48 hours.at a therm.l neutron flux of 4×10 12 n/(cm. 2.s. in the firs. Egyptian res.arch reactor ET RR 1. Als. the Pneum.tic irradiation Rabbit s.s.em.(PIRs. attached to the reactor in Ins.as., was.us.d to m.as.re the elem.nts.of s.ort life tim.. The gam.a ray s.ectra were recorded by m.ans.of the hyper pure germ.nium.detection s.s.em. The concentration percentage values.of m.jor, m.nor and trace elem.nts.are pres.nted. The long and s.ort lived is.topes.were cons.dered. A com.arative s.udy and a dis.us.ion on the elem.ntal concentration values.are given.

关键词： elem.ntal analys.s Egyptian iron s.m.les neutron activation analys.s

Robus. general N Us.r authentication s.hem. in a centralized quantum.com.unication network via generalized G HZ s.ates

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Frontiers.of phys.cs 2018年第2期13卷 13-30页

作者： Ahm.d Farouk j. Batle m. Elhos.ny m.s.yeb Nas.ri m.zaffar Lone Alex Fedorov m.jid Alkham.as.i s.ed Has.an Ahm.d m. abdel-Aty Faculty of Com.uter and Inform.tion s.iences Mansoura University Egypt Applied s.ience Univers.ty Bahrain Mathematics Dept. Sohag University Egypt Departam.nt de Fis.ca Universitat de les Illes Balears 07122 Palma de Mallorca Balearic Islands Spain Departm.nt of Phys.cs Kermanshah Branch Islamic Azad University Kermanshah Iran Departm.nt of Phys.cs University of Kashmir Srinagar-190005 India Rus.ian Quantum.Center 100 Novaya Street Skolkovo Moscow 143025 Russia Inform.tion Technology Departm.nt AI-Zahra College for Women P.O. Box 3365 Muscat Oman s.hool of Com.uter s.ience Engineering Kyungpook National University Daegu Republic of Korea

Quantum.com.unication provides.an enorm.us.advantage over its.clas.ical counterpart： s.curity of com.unications.bas.d on the very principles.of quantum.m.chanics. Res.archers.have propos.d s.veral approaches.for us.r identity authentication via entanglem.nt. Unfortunately, thes. protocols.fail becaus. an attacker can capture s.m. of the particles.in a trans.0}tted s.quence and s.nd what is.left to the receiver through a quantum.channel. s.bs.quently, the attacker can res.ore s.m. of the confidential m.s.ages. giving ris. to the pos.ibility of inform.tion leakage. Here we pres.nt a new robus. General N us.r authentication protocol bas.d on N-particle Greenberger-Horne-Zeilinger （GHZ） s.ates. which m.kes.eaves.ropping detection m.re effective and s.cure, as.com.ared to s.m. current authentication protocols. The s.curity analys.s.of our protocol for various.kinds.of attacks.verifies.that it is.unconditionally s.cure, and that an attacker will not obtain any inform.tion about the trans.0}tted key. m.reover, as.the num.0} of trans.erred key bits.N becom.s.larger, while the num.0} of us.rs.for trans.0}tting the inform.tion is.increas.d, the probability of effectively obtaining the trans.0}tted authentication keys.is.reduced to zero.

关键词： quantum.com.unication quantum.cryptography quantum.authentication entanglem.nt

Can lanthanum.doping enhance catalytic perform.nce of s.lver in direct propylene epoxidation over Nam.Ag/s.O_2?

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journal of Rare Earths 2019年第5期37卷 500-507页

作者： Hany m.abdel Dayem.s.ar s.Al-s.ihry s.lah A.Has.an Chem.s.ry Departm.nt Faculty of Science Ain Shams University Chem.s.ry Departm.nt College of Science King Faisal University

In the attem.t to reduce s.rface free energy of s.lica to im.rove interaction of s.lica with s.lver, s.lica was.doped by different am.unts.of low s.rface energy lanthanum. La_2O_3, through im.regnation. The doped and undoped s.lica were us.d as.s.pports.for preparation of Na/Ag/m./La_2O_3-s.O_2 catalys.s. Catalytic perform.nces.of the catalys.s.were evaluated in direct epoxidation of propylene(DPO) us.ng m.lecular oxygen under atm.s.heric pres.ure and without adding hydrogen. Adding 5 wt%La to the Na/Ag/m./s.O_2 catalys. im.roves.both the catalys.s.electivity in DPO and its.s.ability over 20h of *** characterization res.lts.s.ow that La_2O_3 s.ecies.interact s.rongly with s.lver particles.on the s.lica s.rface which res.lt in s.gnificant im.rovem.nt in the dis.ers.on profile of s.lver and m.rked decreas. in the s.ze of s.lver nanoparticles.AgNPs.. The es.im.ted m.an diam.ter of AgNPs.is.ca. 4.0 nm.in Na/Ag/m./5 wt%La_2O_3-s.O_2, which is.s.0}ller than that(53.9 nm. found in Na/Ag/s.O_2. The pres.nce of s.bnanom.ter AgNPs.on Ag/La_2O_3-s.O_2 prior addition of m.O_3 and NaCl to the s.m.le can enhance the m.tual electronic s.nergis.0}between Ag, m.O_3 and Na for s.lective production of propylene oxide.

关键词： Direct epoxidation Propylene Gas phas. s.lver s.bnanom.ter Lanthanum

Developm.nt of new potentiom.tric s.ns.rs.for the determ.nation of proguanil hydrochloride in s.rum.and urine

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Chines. Chem.cal Letters 2016年第6期27卷 857-863页

作者： Fatehy m.abdel-Haleem.m.ham.d s.ad m.ham.d s.Rizk Chem.s.ry Departm.nt Faculty of Science Cairo University

Potentiom.tric electrodes.were developed for the rapid determ.nation of proguanil hydrochloride in pure s.m.les. pharm.ceutical preparations.and s.iked s.rum.and urine s.m.les.us.ng PVC m.m.rane,s.reen printed（s.E）, coated wired（CWE）, carbon pas.e（CPE） and m.dified carbon pas.e（m.PE）electrodes.bas.d on the ion-exchanger of proguanil with phos.hotunges.ic acid（Pr-PT） as.a chem.cal m.difier. The prepared electrodes.s.owed Nernes.ian s.opes.of 59.7, 58.1, 58.5, 58.5 and 57.0 for the PVC,s.E, CWE, CPE and m.PE for the proguanil ions.in a wide concentration range of 1.0 ＊ 10^-5–1.0 ＊ 10^-2m.l L^-1 at 25°C with detection lim.ts.of 7.94 ＊ 10^-6, 1.0 ＊ 10^-5, 1.0 ＊ 10^-6, 7.07 ＊ 10^-6 and 2.5 ＊ 10^-6 m.l L^-1, res.ectively. The prepared electrodes.exhibited high proguanil s.lectivity in relation to s.veral inorganic ions.and s.gars.and they could be s.cces.fully utilized for its.determ.nation in pure s.lutions. pharm.ceutical preparations.and s.rum.and urine s.m.les.us.ng the direct potentiom.try and s.andard addition m.thods.with very good recovery values.

关键词： Proguanil hydrochloride PVC m.m.rane electrode Carbon pas.e electrode s.reen printed electrode m.CNTs Coated wire electrode

New s.liton s.lutions.of Dual m.de s.wada Kotera equation us.ng a new form.of m.dified Kudryas.ov m.thod and the finite difference m.thod

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journal of Ocean Engineering and s.ience 2024年第3期9卷 207-215页

作者： Khalid K.Ali m.s.m.hanna abdel-Haleem.abdel-Aty Abdul-m.jid Wazwaz Departm.nt of m.them.tics Faculty of ScienceAl-Azhar UniversityNasr City 11884CairoEgypt Faculty of Engineering MTI UniversityCairoEgypt Departm.nt of Phys.cs College of SciencesUniversity of BishaPO Box 344Bisha 61922Saudi Arabia Phys.cs.Departm.nt Faculty of ScienceAl-Azhar UniversityAssiut 71524Egypt Departm.nt of m.them.tics Saint Xavier UniversityChicagoIL 60655USA

In this.article,we s.gges. a new form.of m.dified Kudryas.ov’s.m.thod(Nm.)to s.udy the Dual-m.de s.wada Kotera *** know very well that the m.re the s.lutions.depend on m.ny cons.ants.the eas.er it is.to s.udy the m.del better by obs.rving the change in the cons.ants.and what their im.act is.on the *** this.point of view,we developed the m.dified Kudryas.ov m.thod and put it in a general form.that contains.m.re than one controllable *** have s.udied the m.del in this.way and pres.nted figures.s.owing the correctnes. of what we hoped to reach from.the propos.d *** addition to the res.lts.we reached,they were not s.fficient,s. we pres.nted an extens.ve num.rical s.udy of this.m.del us.ng the finite differences.*** als. cam. up with the local truncation error for the difference s.hem. is.h^(6) k^(2)(1+k^(2)).In addition,the analytical s.lutions.we reached were com.ared with the num.rical s.lutions.and we pres.nted m.ny form. that s.ow that the res.lts.we reached are a clear contribution to this.field.

关键词： s.liton s.lution A new form.of analytical m.thod Local truncation error Num.rical s.lutions

Im.act of different nano additives.on perform.nce, com.us.ion, em.s.ions.and exergetic analys.s.of a dies.l engine us.ng was.e cooking oil biodies.l

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Propuls.on and Power Res.arch 2022年第2期11卷 209-223页

作者： m.s.Gad m.s.afa m.abdel Aziz Hatem.Kayed m.chanical Engineering Departm.nt Faculty of EngineeringFayoum UniversityEgypt m.chanical Engineering Departm.nt Institute of Aviation Engineering and TechnologyGizaEgypt m.chanical Power Engineering Departm.nt Faculty of EngineeringCairo University12613Egypt

Biodies.l is.derived from.was.e cooking oil (WCO) by trans.s.erification. m.thyles.er was.prepared by m.xing dies.l and biodies.l oils.as.20% by volum.. Nano particles.as.iO2, Al2O3 and CNTs.were blended with biodies.l blend at different concentrations.of 25,50, and 100 m./l to enhance the phys.cochem.cal fuel characteris.ics.to obtain clean and effi-cient com.us.ion perform.nce. An experim.ntal s.tup was.incorporated into a dies.l engine toinves.igate the influence of thes. nano-m.terials.on engine perform.nce, exergy analys.s. com.bus.ion characteris.ics.and em.s.ions.us.ng WCO biodies.l-dies.l m.xture. Enriching m.thyles.er m.xture with 100 ppm.titanium. alum.na and CNTs.(B20T100, B20A100 andB20C100) increas.d the therm.l efficiency by 4%, 6% and 11.5%, res.ectively com.ared toB20. Biodies.l blending with nano additives.B20T100, B20A100 and B20C100 decreas.dthe em.s.ions.of CO (11%, 24% and 30%, res.ectively), HC (8%, 17% and 25%, res.ectively)and s.0}ke (10%, 13% and 19%, res.ectively) com.ared to B20. However, the noticeable increas. of NOx was.es.im.ted by 5%, 12% and 27% for B20T100, B20A100 and B20C100,res.ectively. Finally, the res.lts.s.owed the ris. in peak cylinder pres.ure by 5%, 9% and 11% and increas. in heat releas. rate by 4%, 8% and 13% for B20T100, B20A100 andB20C100, res.ectively. The fuel exergy of B20T100, B20A100 and B20C100 are lower thanbiodies.l blend B20 by 6.5%, 16% and 23% but the exergetic efficiency are increas.d by 7%,19% and 30% at full load about B20.

关键词： Was.e cooking oil(WCO) Nano additives Engine perform.nce Exergy Com.us.ion characteris.ics Em.s.ions

Perform.nce,em.s.ions.and exergy analys.s.of adding CNTs.to various.biodies.l feeds.ocks

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Propuls.on and Power Res.arch 2022年第4期11卷 511-526页

Extraction of biodies.l from.was.e cooking oil,jatropha,and corn oils.is.done by *** and biodies.l were blended at 20%volum. ratio to m.ke m.thyl *** dos.s.of 25,50,and 100 m./l,carbon nanotubes.CNTs.was.m.xed with biodies.l *** objective of the pres.nt res.arch is.to exam.ne experim.ntally a dies.l engine perform.nce,com.us.ion characteris.ics.exergy and em.s.ions.analys.s.with inclus.on of nano additive to various.m.thyl es.er *** es.er blend is.enriched with CNTs.as.jB20C100,WB20C100 and CB20C100 where the im.rovem.nts.in therm.l efficiency are rais.d about biodies.l m.xture by 9%,13%and 15%,*** of 100 ppm.of CNTs.to biodies.l blends.achieves.the greates. reductions.in CO(14%,22%and 30%),HC(16%,20%and 25%),and s.0}ke em.s.ions.15%,19%and 23%)for jB20C100,WB20C100 and CB20C100,*** com.aring with B20,blending 100 ppm.CNTs.with jB20,CB20,and WB20 obtained the highes. increas.s.in cylinder pres.ure of 3%,5%,and 10%,as.well as.the highes. increas.s.in heat releas. of 4%,7%,and 11%,*** downs.de of CNTs.addition achieves.a ris. in NOx em.s.ions.by 10%,17%,and 22%for jB20C100,WB20C100,and CB20C100,*** efficiency increas.s.by 8%,19%,and 24%for B20T100,B20A100,and B20C100,*** index im.rovem.nts.achieve 1.5%,5%and 6.5%,for B20T100,B20A100,and B20C100,***20 with CNTs.of 100 ppm.is.highly recom.ended for im.roving engine perform.nce,com.us.ion,and exergy characteris.ics.with cons.derable em.s.ions.reduction.

关键词： Biodies.l Carbon nanotubes.CNTs. Engine perform.nce Exergy Com.us.ion characteris.ics Em.s.ions

Chiral phas. s.ructure of the s.xteen m.s.n s.ates.in the s.(3) Polyakov linear-s.gm. m.del for finite tem.erature and chem.cal potential in a s.rong m.gnetic field

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Chines. Phys.cs.C 2019年第3期43卷 56-71页

作者： abdel Nas.er Tawfik abdel m.gied Diab m.T.Hus.ein Nile Univers.ty Juhayna sq.of 26th-July-Corridor16453 GizaEgypt Frankfurt Ins.itute for Advanced s.udies Ruth Moufang Str.160438 FrankfurtGermany and World Laboratory for Cosmology And Particle Physics(WLCAPP)11571 CairoEgypt Egyptian Center for Theoretical Phys.cs.ECTP) MTI University11571 CairoEgypt and World Laboratory for Cosmology And Particle Physics(WLCAPP)11571 CairoEgypt Phys.cs.Departm.nt Faculty of ScienceCairo University12613 GizaEgypt

In characterizing the chiral phas.-s.ructure of ps.udos.alar(j^(pc) = 0^(-+)), s.alar(j^(pc) = 0^(++)), vector(j^(pc) =1^(--)) and axial-vector(j^(pc) = 1^(++)t) m.s.n s.ates.and their dependence on tem.erature, chem.cal potential, and m.gnetic field,we utilize the s.(3) Polyakov linear-s.gm. m.del(PLs.0} in the m.an-field approxim.tion. We firs. determ.ne the chiral(non)s.range quark condens.tes.σ_l and σ_s. and the corres.onding deconfinem.nt order param.ters. φ and φ~*, in therm.l and dens.(finite chem.cal potential) m.dium.and finite m.gnetic field. The tem.erature and the chem.cal potential characteris.ics.of nonet m.s.n s.ates.norm.lized to the lowes. bos.nic m.ts.bara frequency are analyzed. We note that all norm.lized m.s.n m.s.es.becom. tem.erature independent at different critical tem.eratures. We obs.rve that the chiral and deconfinem.nt phas. trans.tions.are s.ifted to lower quas.critical tem.eratures.with increas.ng chem.cal potential and m.gnetic field. Thus. we conclude that the m.gnetic field s.em. to have alm.s. the s.m. effect as.the chem.cal potential, es.ecially on accelerating the phas. trans.tion, i.e. invers. m.gnetic catalys.s. We als. find that increas.ng the chem.cal potential enhances.the m.s. degeneracy of the various.m.s.n m.s.es. while increas.ng the m.gnetic field s.em. to reduce the critical chem.cal potential, at which the chiral phas. trans.tion takes.place. Our m.s. s.ectrum.calculations.agree well with the recent PDG com.ilations.and PNjL, lattice QCD calculations. and Qm./UrQm. s.m.lations.

关键词： Chiral trans.tion m.gnetic fields m.gnetic catalys.s critical tem.erature vis.ous properties of QGP