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Microstructure and strength of a tantalum-tungsten alloy after cold rolling from small to large strains

Journal of Materials Science & Technology 2021年第24期83卷 34-48页

作者： Guoqiang Ma Darcy A.Hughes andrew w.godfrey Qiang Chen Niels Hansena Guilin wu College of Materials Science and Engineering Chongqing UniversityChongqing400044China Department of Mechanical Engineering Technical University of DenmarkDK-2800KgsLyngbyDenmark Fremont CAUSA Laboratory of Advanced Materials(MOE) School of Materials Science and EngineeringTsinghua UniversityBeijing100084China Southwest Technology and Engineering Research Institute Chongqing400039China Technical University of Denmark Risoe CampusDK-4000RoskildeDenmark Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing100083China

Microstructural evolution of a refractory tantalum-tungsten alloy(Ta-4%w)after cold rolling from small to large von-Mises strains(0.12-2.7)was quantitatively studied using transmission electron *** subdivision was observed to take place at two *** necessary boundaries nearly paralleling to slip planes enclosed volumes further divided by diffuse cells and by remnants of Taylor *** increasing strain,the diffuse cells evolved into clear incidental dislocation boundaries enclosing cells,while the Taylor lattices *** subdivision was thus intermediate between those observed in cell forming and in non-cell forming ***,the average misorientation angle across all boundaries increased while the average boundary spacing *** of the microstructural parameters at each strain level were found to exhibit universal scaling *** microstructural evolution was found closely linking to the observed high strength and strain hardening of this *** on measured microstructural parameters,the flow stress was calculated utilizing linearly addition of the strengthening by solutes,incidental dislocation boundaries(Taylor strengthening)and geometrically necessary boundaries(Hall-Petch equation).The relative contribution of each strength mechanism evolved with increasing strain and with microstructural evolution:solutes and friction stress dominated at small strains while boundaries dominated at larger *** strengths were in close agreement with experimental tension tests and demonstrated an unexpectedly high and continuous parabolic hardening without transition across this large strain range.

关键词： Tantalum Deformation microstructure Geometrically necessary boundaries Taylor lattices Flow stress

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Gut microbiome regulates inflammation and insulin resistance:a novel therapeutic target to improve insulin sensitivity

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Signal Transduction and Targeted Therapy 2024年第3期9卷 825-827页

作者： Dilvin Semo Holger Reinecke Rinesh godfrey Vascular Signalling Molecular CardiologyDepartment of Cardiology I-Coronary and Peripheral Vascular DiseaseHeart FailureUniversity Hospital Münster48149 MünsterGermany

In a recent study published in Nature,Takeuchi et *** a multiomics strategy in humans to provide compelling evidence that increased carbohydrate metabolism by the gut microbiota contributes to insulin resistance(IR).The authors uncovered a previously unknown link between elevated gut monosaccharides and host inflammatory cytokines and suggest potential intervention opportunities to combat IR by targeting specific gut microbial species.

关键词： metabolism inflammation al.

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On the apparent line-of-sight alignment of the peak X-ray intensity of the magnetosheath and the tangent to the magnetopause,as viewed by SMILE-SXI

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Earth and Planetary Physics 2024年第1期8卷 155-172页

作者： andrew Read Department of Physics&Astronomy University of LeicesterLeicesterLE17RHUK

The Soft X-ray Imager(SXI)on board the Solar wind Magnetosphere Ionosphere Link Explorer(SMILE)spacecraft will be able to view the Earth’s magnetosheath in soft *** images of the X-ray emission visible from the position of SMILE are created for a range of solar wind densities by using 3 years of the SMILE mission orbit,together with models of the expected X-ray emissivity from the Earth’s *** from global magnetohydrodynamic simulations and a simple model for exospheric neutral densities are used to compare the locations of the lines of sight along which integrated soft X-ray intensities peak with the lines of sight lying tangent to surfaces(defined here to be the magnetopause)along which local soft X-ray intensities peak or exhibit their strongest gradients,or both,for strongly southward interplanetary magnetic field conditions when no depletion or low-latitude boundary layers are ***,in the parameter space of the various times and seasons,orbital phases,solar wind conditions,and magnetopause models,the alignment of the X-ray emission peak with the magnetopause tangent is good,or is not,is *** main results are as *** spacecraft needs to be positioned well outside the magnetopause;low-altitude times near perigee are not *** addition,there are seasonal aspects:dayside-apogee orbits are generally very good because the spacecraft travels out sunward at high altitude,but nightside-apogee orbits,behind the Earth,are bad because the spacecraft only rarely leaves the ***-apogee and dawnapogee orbits are ***-apogee orbits worsen slightly over the first three mission years,whereas nightside-apogee orbits improve ***,many more times of good agreement with the peak-to-tangent hypothesis occur when the solar wind is in a high-density state,as opposed to a low-density *** a high-density state,the magnetopause is compressed,and the spacecraft is more often a good d

关键词： X-rays magnetosphere magnetosheath magnetopause Solar wind Magnetosphere Ionosphere Link Explorer(SMILE) Earth solar wind charge exchange

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On the Road To Development

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ChinAfrica 2024年第6期16卷 42-43页

作者： godfrey OLUKYA 不详

Uganda’s President Yoweri Museveni has lamented that his country’s bad roads get easily damaged by heavy rains,while also expressing his confidence in the new roads recently built by Chinese construction companies.

关键词： companies expressing Road

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Convenience on Three wheels China-made motor tricycles are transforming the way goods and people are transported in Uganda

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ChinAfrica 2024年第8期16卷 44-45页

作者： godfrey OLUKYA 不详

In most cities,towns and villages in Uganda,Chinamade motor tricycles have become a game-changer for commuters and entrepreneurs alike.

关键词： goods cycles motor

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Seeking More Influence In Global Affairs

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ChinAfrica 2024年第3期16卷 40-41页

作者： godfrey OLUKYA 不详

Uganda hosts NAM and G77+China summits with calls to push back against *** played host to two important summits in *** 19th Summit of Heads of State and Government of the Non-Aligned Movement(NAM)on 19 January,and the Third South Summit of the G77+China on 21 January,both took place in the nation’s capital of ***,it was the first time for the South Summit to be held in *** was well represented at both summits,which attracted over 2,000 leaders and delegates,including over 20 heads of states.

关键词： push Africa G77

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Powering Up

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ChinAfrica 2024年第7期16卷 38-39页

作者： godfrey OLUKYA 不详

Uganda launches giant China-constructed hydropower plant to bolster its electricity supply,and also assist South Sudan with theirs Ugandans and South Sudanese have had their lives lit up by the steady flow of electric... 详细信息

关键词： massive electricity Power

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Sur la voie du développement

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中国与非洲（法文版） 2024年第6期16卷 42-43页

作者： godfrey OLUKYA 不详

Le Président ougandais Yowerl Musevenl a exprimésa préoccupation concernant les routes endommagées par de fortes pluies dans son pays,tout en témoignant sa confiance envers les nouvelles routes récemment constru... 详细信息

关键词： les des occupation

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Defis mondiaux,sol lutions unies L'Ouganda,terre d'accueil pour le MNA et le G77+Chine

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中国与非洲（法文版） 2024年第3期16卷 40-41页

作者： godfrey OLUKYA 不详

En janvier,I'Ouganda aéte le theatre de deuxévenements majeurs sur la scene *** pays a accueilli,a Kampala,sa capitale,le 19e Sommet du Mouvement des non alignés(MNA)le 19 janvier,suivi de pres par le troisieme Sommet du Sud du G77+Chine le 2l *** rencontres ont marquéun moment historique car c'était la premiere fois que le Sommet du Sud se deroulait sur le continent africain.

关键词： des pour ill

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Mshpy23:a user-friendly,parameterized model of magnetosheath conditions

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Earth and Planetary Physics 2024年第1期8卷 89-104页

作者： Jaewoong Jung Hyunju Connor andrew Dimmock Steve Sembay andrew Read Jan Soucek NASA Goddard Space Flight Center GreenbeltMDUSA Department of Astronomy University of MarylandCollege ParkMDUSA Swedish Institude of Space Physics UppsalaSweden University of Leicester LeicesterUK Institute of Atmospheric Physics Academy of Sciences of the Czech Republic

Lunar Environment heliospheric X-ray Imager(LEXI)and Solar wind−Magnetosphere−Ionosphere Link Explorer(SMILE)will observe magnetosheath and its boundary motion in soft X-rays for understanding magnetopause reconnection modes under various solar wind conditions after their respective launches in 2024 and *** conditions,namely,plasma density,velocity,and temperature,are key parameters for predicting and analyzing soft X-ray images from the LEXI and SMILE *** developed a userfriendly model of magnetosheath that parameterizes number density,velocity,temperature,and magnetic field by utilizing the global Magnetohydrodynamics(MHD)model as well as the pre-existing gas-dynamic and analytic *** this parameterized magnetosheath model,scientists can easily reconstruct expected soft X-ray images and utilize them for analysis of observed images of LEXI and SMILE without simulating the complicated global magnetosphere ***,we created an MHD-based magnetosheath model by running a total of 14 OpenGGCM global MHD simulations under 7 solar wind densities(1,5,10,15,20,25,and 30 cm)and 2 interplanetary magnetic field Bz components(±4 nT),and then parameterizing the results in new magnetosheath *** compared the magnetosheath model result with THEMIS statistical data and it showed good agreement with a weighted Pearson correlation coefficient greater than 0.77,especially for plasma density and plasma ***,we compiled a suite of magnetosheath models incorporating previous magnetosheath models(gas-dynamic,analytic),and did two case studies to test the *** MHD-based model was comparable to or better than the previous models while providing self-consistency among the magnetosheath ***,we constructed a tool to calculate a soft X-ray image from any given vantage point,which can support the planning and data analysis of the aforementioned LEXI and SMILE missions.A release of the code has been uploaded to a Git

关键词： magnetosheath python modeling

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