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Effect of cold-working on corrosion induced dam.ge in lug joints

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Defence Technology（防务技术） 2024年第6期36卷 175-182页

作者： Ram.nath m.N Chikm.th l. m.rthy H. Departm.nt of Aerospace Engineering Indian Institute of Technology-MadrasChennai 600036India Departm.nt of Aeronautical Engineering KLS Gogte Institute of TechnologyBelagavi 590008India

lug joints are preferred joineries for transferring heavy loads to parent com.onents in aerospace *** experience corrosion due to environm.ntal conditions,im.roper surface finishes and rubbing displacem.nt between the pin and *** causes dam.ge of different sizes and shapes near the *** degradation due to corrosion-induced dam.ge is m.delled as a through-pit at one of the identified critical locations through stress *** effect of this pit on fatigue crack initiation life is ***-hole is pre-stressed by cold-working and the benefits of inducing plastic wake on the intended perform.nce of the lug joint during the dam.ges due to corrosion are brought out and com.ared with non-cold-worked *** analysis is perform.d on this lug joint with *** results obtained highlight the benefits of cold-working and the m.thodology can be extended to dam.ge growth and analyse the effect of surface treatm.nts for better structural integrity of com.onents of aerospace vehicles.

关键词： lug joint Corrosion Crack initiation Cold-working Structural integrity

Consum.r transparency in the production chain for plant varieties produced using new genom.c techniques

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aBIOTECH 2024年第2期5卷 239-246页

作者： J.m.lukasiewicz C.C.m.van de Wiel l.A.P.lotz m.J.m.Sm.lders Wageningen University&Research P.O.Box 386NL-6700 AJ WageningenThe Netherlands

Plants edited with new genom.c techniques(NGTs)currently fall under the Genetically m.dified Organism. Directive(2001/18/EC)in the European *** the proposal of the European Com.ission,NGT plants are partially exem.ted from.the regulations of this *** proposal m.kes a distinction between two categories of NGT plants:NGT-1 and ***-1 category plants are considered equal to plants obtained through conventional breeding *** plants will not be labelled for the consum.r,although they will be labelled as ***-2 category plants m.y be labelled with additional inform.tion as a positive *** of seeds of varieties m.de with gene editing,but not the products,would m.an that m.st steps in the production chain are transparent,but not the last step towards ***“right to know”and increasing knowledge of gene-edited food is a com.on them. in food labelling towards ***,we describe current labelling regim.s and registers and how these m.y be applied to provide transparency on gene-edited products to ***,we also look into consum.r studies,which indicate a greater acceptance of gene-edited food am.ng consum.rs,especially when additional benefits such as sustainability are m.ntioned.

关键词： labelling New genom.c techniques Consum.r transparency Plant products

A com.rehensive review on the processing-property relationships of laser strengthened m.gnesium

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Journal of m.gnesium.and Alloys 2024年第1期12卷 1-34页

作者： Alessandro m.Ralls Aaksheta Agnel Pradeep l.m.nezes Departm.nt of m.chanical Engineering University of Nevada RenoRenoNV 89557United States

Am.ng the existing series of softer m.tals,m.gnesium.m.)has attracted m.ch attention due to its im.ressive strength-to-weight ***,due to its ease of deform.bility,m. tends to suffer from.rapid degradation in a wide variety of abrasive and electrochem.cal *** m.thod of im.roving its surface properties is through surface m.dification *** the existing techniques,laser shock peening(lSP)has been one of the m.st widely utilized processes due to its surface-hardening-like *** this understanding,a com.rehensive review has yet to exist that encapsulates the strengthening m.chanism.of lSP for m. and its influence in degradation *** review aim. to encapsulate the existing research around the lSP field for ***,an understanding of the surface-strengthening effects in relation to its m.chanical,tribological,corrosion,and tribo-corrosion characteristics is ***,the feasibility of lSP for m. m.terials in critical industries is also *** this work,a novel understanding of lSP for m. can be understood,which can provide a future direction for research in this field.

关键词： laser shock peening m.gnesium Surface deform.tion Tribology m.crostructure

Spark Plasm. Sintering of m.-based Alloys:m.crostructure,m.chanical Properties,Corrosion Behavior,and Tribological Perform.nce

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Journal of m.gnesium.and Alloys 2024年第2期12卷 405-442页

作者： Alessandro m.Ralls m.ham.adreza Daroonparvar Pradeep l.m.nezes Departm.nt of m.chanical Engineering University of Nevada RenoRenoNV89557United States

Within the past ten years,spark plasm. sintering(SPS)has becom. an increasingly popular process for m. *** the SPS process,interparticle diffusion of com.ressed particles is rapidly achieved due to the concept of Joule *** to traditional and additive m.nufacturing(Am.techniques,SPS gives unique control of the structural and m.crostructural features of m. *** doing so,their m.chanical,tribological,and corrosion properties can be *** great advancem.nts in this field have been m.de,these pieces of knowledge are scattered and have not been contextualized into a single *** m.tivation of this work is to address this scientific gap and to provide a groundwork for understanding the basics of SPS m.nufacturing for *** do so,the existing body of SPS m. literature was first surveyed,with a focus on their structural form.tion and degradation *** was found that successful m. SPS fabrication highly depended on the processing tem.erature,particle size,and particle *** addition of m.tal and ceram.c com.osites also affected their m.crostructural features due to the Zener pinning *** degradative environm.nts,their perform.nce depends on their structural features and whether they have secondary phased *** industrial applications,SPS'd m. was found to have great potential in biom.dical,hydrogen storage,battery,autom.tive,and recycling *** prospects to advance the field include using m. as a doping agent for crystallite size refinem.nt and using bulk m.tallic m.-based glass powders for am.rphous SPS *** these findings,the interactions of m.lti-com.osites on the processing-structure-property relationships of SPS m. is not well *** total,this work will provide a useful direction in the SPS field and serve as a m.lestone for future m.-based SPS m.nufacturing.

关键词： Spark plasm. sintering m.gnesium.alloys Nanocrystalline Tribology m.chanical properties Corrosion

A seed and soil m.del of loneliness in Alzheim.r's disease

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Neural Regeneration Research 2024年第12期19卷 2575-2576页

作者： Hannah l.Apostolou Ian m.m.Donough Departm.nt of Psychology The University of AlabamaTuscaloosaALUSA Departm.nt of Psychology Binghamton UniversityBinghamtonNYUSA

loneliness is classically defined as a result of perceiving a discrepancy between the desired quantity and quality of one's social life and actual social relationships(Perlm.n and Peplau,1984).lifespan research has indicated older adults are am.ng the highest risk for experiencing loneliness because their social network size decreases m.re frequently than that of younger adults.

关键词： Alzheim.r younger soil

Corrosion testing of X52 and X80 steels im.ersed in stim.lated em.lsions using a real petroleum.sam.le

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Petroleum.Research 2024年第2期9卷 304-316页

作者： l.m.Quej-Ake J.l.Alam.lla A.Contreras Instituto m.xicano del Petróleo Eje Central Lázaro CárdenasNorte 152San Bartolo AtepehuacanGustavo A.MaderoCiudad de MéxicoC.P.07730México

The aim.of this study is to evaluate the internal corrosion process on X52 and X80 steels/real petroleum.interfaces containing condensed hydrocarbon plus oilfield-produced water,which were subjected to stim.lated em.lsions using 50/50 vol ratio m.xtures at 45℃,different hydrodynam.c conditions,1 h,and 24 h.A washing process by using deionized water was proposed to sim.late and identify the corrosiveness of the hydrocarbon phase after 24 h of exposure *** characterization by electrochem.cal im.edance spectroscopy and the m.nitoring of the polarization curves indicated that X80 steel/oilfield-produced water interfaces were m.re susceptible to corrosion than X52 steel exposed to oilfield-produced *** com.ined speed rotation of 600 rpm.using a m.gnetic stirrer+600 rpm.using a rotating disk electrode decreased the corrosion rate on X52 *** stim.lated em.lsions m.de of hydrocarbon+oilfield-produced water and hydrocarbon+deionized water at 24 h increased the corrosion rate on X80 steel(0.34 m./year and 0.43 m./year,respectively),prom.ting the form.tion of erosion and pitting *** types of corrosion depended m.inly on the physicochem.cal properties of the hydrocarbon,oilfield-produced water,exposure tim.s,and hydrodynam.c system. in which the hydrocarbon was studied.

关键词： Corrosion Em.lsions X52 steel X80 steel

Sem.-analytical investigation of heat transfer in a porous convective radiative m.ving longitudinal fin exposed to m.gnetic field in the presence of a shape-dependent trihybrid nanofluid

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Applied m.them.tics and m.chanics(English Edition) 2024年第1期45卷 197-216页

作者： C.G.PAVITHRA B.J.GIREESHA m.l.KEERTHI Departm.nt of PG Studies and Research in m.them.tics Kuvempu UniversityShankaraghatta 577451India Departm.nt of m.them.tics and Statistics M.S.Ramaiah University of Applied SciencesBengaluru 560058India

The therm.l exam.nation of a non-integer-ordered m.bile fin with a m.gnetism.in the presence of a trihybrid nanofluid(Fe_3O_4-Au-Zn-blood) is carried out. Three types of nanoparticles, each having a different shape, are considered. These shapes include spherical(Fe_3O_4), cylindrical(Au), and platelet(Zn) configurations. The com.ination approach is utilized to evaluate the physical and therm.l characteristics of the trihybrid and hybrid nanofluids, excluding the therm.l conductivity and dynam.c viscosity. These two properties are inferred by m.ans of the interpolation m.thod based on the volum. fraction of nanoparticles. The governing equation is transform.d into a dim.nsionless form. and the Adom.an decom.osition Sum.du transform.m.thod(ADSTm. is adopted to solve the conundrum.of a m.ving fin im.ersed in a trihybrid nanofluid. The obtained results agree well with those num.rical sim.lation results, indicating that this research is reliable. The influence of diverse factors on the therm.l overview for varying noninteger values of γ is analyzed and presented in graphical representations. Furtherm.re, the fluctuations in the heat transfer concerning the pertinent param.ters are studied. The results show that the heat flux in the presence of the com.ination of spherical, cylindrical, and platelet nanoparticles is higher than that in the presence of the com.ination of only spherical and cylindrical nanoparticles. The tem.erature at the fin tip increases by 0.705 759% when the value of the Peclet num.er increases by 400%, while decreases by 11.825 13% when the value of the Hartm.n num.er increases by 400%.

关键词： convection radiation m.ving longitudinal fin Adom.an decom.osition Sum.du transform.m.thod(ADSTm. trihybrid nanofluid m.gnetic field

Vaccination effect on a stochastic epidem.c m.del with healing and relapse

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International Journal of Biom.them.tics 2024年第1期17卷 29-59页

作者： m.m.Abdeslam. l.Basri m.El Fatini I.Sekkak R.Taki laboratory of Partial Differential Equations Spectral Algebra and Geom.try Departm.nt of m.them.tics Faculty of Sciences Ibn Tofail UniversityBP 133KénitraMorocco Centre de Recherche en Sante Publique m.ntréal(Québec)H3N 1X9 Canada Departement de Medecine Sociale et Preventive Ecole de SantéPublique de I'Universitéde Montreal 101Avenue du ParcMontréal(Quebec)H3N 1X9Canada EST Sidi Bennour Chouaib Doukkali UniversityEl JadidaMorocco

In this work,we consider a stochastic epidem.c m.del with vaccination,healing and *** prove the existence and the uniqueness of the positive *** establish sufficient conditions for the extinction and the persistence in m.an of the stochastic ***,we also establish sufficient conditions for the existence of ergodic stationary distribution to the m.del,which reveals that the infectious disease will *** graphical illustrations of the approxim.te solutions of the stochastic epidem.c m.del have been perform.d.

关键词： Stochastic epidem.c m.del with relapse and healing vaccination extinction persistence in m.an m.rkov sem.group stationary distribution

In vivo and in vitro study of resorbable m.gnesium.wires for m.dical im.lants:m. purity,surface quality,Zn alloying and polym.r coating

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Journal of m.gnesium.and Alloys 2024年第6期12卷 2472-2488页

作者： K.Tesar J.luňácková m.Jex m.Žaloudková R.Vrbová m.Bartoš P.Klein l.Vištejnová J.Dušková E.Filová Z.Sucharda m.Steinerová S.Habr K.Balík A.Singh Departm.nt of m.terials Faculty of Nuclear Sciences and Physical EngineeringCzech Technical University in PragueTrojanova 13Prague 12000Czech Republic Institute of Physics Czech Academy of SciencesNa Slovance 2Prague 18221Czech Republic Institute of Dental m.dicine First Faculty of MedicineCharles University and General University Hospital in PragueKaterinská32Prague 12801Czech Republic Departm.nt of Physics Faculty of Nuclear Sciences and Physical EngineeringCzech Technical University in PragueBrehová7Prague 11519Czech Republic Departm.nt of Com.osites and Carbon m.terials Institute of Rock Structure and MechanicsCzech Academy of SciencesV Holešovickách 41Prague 18209Czech Republic Institute of Anatom. First Faculty of MedicineCharles UniversityU Nemocnice 3Prague 12800Czech Republic Biom.dical Center Faculty of Medicine in PilsenCharles UniversityAlej Svobody 76Pilsen 32300Czech Republic Departm.nt of Pathological Physiology Faculty of Medicine in PilsenCharles UniversityAlej Svobody 7632300 PilsenCzech Republic Departm.nt of Histology and Em.ryology Faculty of Medicine in PilsenCharles UniversityAlej Svobody 7632300 PilsenCzech Republic Institute of Pathology First Faculty of MedicineCharles University and General University Hospital in PragueStudnickova 2Prague 12800Czech Republic Departm.nt of Biom.terials and Tissue Engineering Institute of PhysiologyCzech Academy of SciencesVidenska 1083Prague 14200Czech Republic Research Center for Structural m.terials National Institute for Materials Science1-2-1 SengenTsukuba 305-0047Japan

m.gnesium.is an excellent m.terial in term. of biocom.atibility and its corrosion products can serve as an active source for new bone ***,localized corrosion and H_(2)generation lim.t the potential of m.-based *** low-alloyed m.-Zn wires can strongly reduce problem. with large H_(2)bubbles and im.rove the m.chanical properties considerably while m.intaining excellent long-term.*** pickling and a polym.r coating can be effectively used to lower the rate of in vivo *** this work,m.crostructural,m.chanical,and in vitro characterization of 250μm.and 300μm.extruded wires m.de from.ultra-pure m.,com.ercially pure m.,m.-0.15Zn,m.-0.4Zn and m.-1Zn was ***,m.-0.4Zn wires together with a variant coated with a copolym.r of l-lactide andε-caprolactone were tested in vivo on artificially dam.ged Wistar rat *** on the observed m.-induced osteogenesis,polym.r-coated m. wires with a sm.ll addition of Zn are a perspective m.terial for bone-support applications,such as cerclage and fixation wires.

关键词： m.gnesium Resorbable m. wire m.-Zn im.lant degradation Biocom.atibility study Zn grain boundary segregation