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Data-mining and atmospheric corrosion resistance evaluation of Sn-and Sb-additional low alloy steel based on big data technology

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International Journal of Minerals,Metallurgy and Materials 2022年第4期29卷 825-835页

作者： Xiaojia Yang Jike Yang Ying Yang Qing Li Di Xu Xuequn Cheng Xiaogang Li Institute for Advanced Materials and Technology University of Science and Technology BeijingBeijing 100083China Shunde Graduate School University of Science and Technology BeijingFoshan 528399China Beike Research Center for Advanced Corrosion Resistant Materials Guangzhou 511400China

Machine-learning and big data are among the latest approaches in corrosion *** biggest challenge in corrosion research is to accurately predict how materials will degrade in a given *** big data is the application of mathematical methods to huge amounts of data to find correlations and infer *** is possible to use corrosion big data method to distinguish the influence of the minimal changes of alloying elements and small differences in microstructure on corrosion resistance of low alloy *** this research,corrosion big data evaluation methods and machine learning were used to study the effect of Sb and Sn,as well as environmental factors on the corrosion behavior of low alloy *** depict corrosion big data method can accurately identify the influence of various factors on corrosion resistance of low alloy and is an effective and promising way in corrosion research.

关键词： machine-learning corrosion big data low alloy steels corrosion resistance

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Ultrafine-grained Ti6Al7Nb-xCu alloy with ultrahigh strength and exceptional biomedical properties

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Journal of Materials science & technology 2023年第33期164卷 68-78页

作者： Yi Li Hai Wang Konrad Koenigsmann Hui Liu Shuyuan Zhang Ling Ren Ke Yang Shi-changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China University of Chicago ChicagoIL 60637USA Binzhou Institute of Technology Shandong Key Laboratory of Advanced Aluminum Materials and TechnologyBinzhou 256606China

Grain refinement has been found to be able to improve the strength of metals without reducing their plasticity or *** this work,ultrafine-grained Ti6Al7Nb-xCu(x=0,3 wt%,6 wt%,9 wt%)alloys were fabricated based on the clinically used Ti6Al7Nb alloy via Cu alloying fabrication strategy combined with dynamic recrystallization(DRX)from martensite during hot *** results indicate that Cu alloying is not only effective in reducing the width of martensite laths after quenching in theβphase region but also increases the nucleation rate of DRX during the high-temperature ***,the Ti2Cu phase that precipitates from the matrix can pin the grain boundaries and inhibit their growth during the high-temperature *** optimal Cu concentration of Ti6Al7Nb-xCu alloy is determined to be 6 wt%,and the optimal deformation temperature is determined to be 750°*** this Cu content and deformation temperature,the grain size is only 270 nm,the tensile strength is up to 1266±10 MPa,and the elongation is 17%.Compared with the commercial Ti6Al7Nb alloy,the ultrafine-grained Ti6Al7Nb-6Cu alloy has better overall mechanical properties,good biocompatibility,and unique antibacterial *** work provides a theoretical basis for fabricating the new antibacterial titanium-based alloys with high strength.

关键词： High strength titanium alloy Ultrafine grain Antibacterial Dynamic recrystallization

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Annotations for Exploring Food Tweets From Multiple Aspects 30

Annotations for Exploring Food Tweets From Multiple Aspects

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Joint 30th International Conference on Computational Linguistics and 14th International Conference on Language Resources and Evaluation, LREC-COLING 2024

作者： Rikters, Matīss Marrese-Taylor, Edison Vīksna, Rinalds Artificial Intelligence Research Center National Institute of Advanced Industrial Science and Technology Japan University of Latvia Latvia

ISBN: (纸本)9782493814104

This research builds upon the Latvian Twitter Eater Corpus (LTEC), which is focused on the narrow domain of tweets related to food, drinks, eating and drinking. LTEC has been collected for more than 12 years and reaching almost 3 million tweets with the basic information as well as extended automatically and manually annotated metadata. In this paper we supplement the LTEC with manually annotated subsets of evaluation data for machine translation, named entity recognition, timeline-balanced sentiment analysis, and text-image relation classification. We experiment with each of the data sets using baseline models and highlight future challenges for various modelling approaches. © 2024 ELRA Language Resource Association: CC BY-NC 4.0.

关键词： Sentiment analysis

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Influence of Hot-Rolling Deformation on Microstructure,Crystalline Orientation,and Texture Evolution of the Ti6Al4V-5Cu Alloy

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Acta Metallurgica Sinica(English Letters) 2023年第8期36卷 1261-1280页

作者： Solomon Kerealme Yeshanew Chunguang Bai Qing Jia Tong Xi Zhiqiang Zhang Diaofeng Li Zhizhou Xia Rui Yang Ke Yang Shi-Changxu Innovation Center for Advanced Materials Institute of Metal Research(IMR)Chinese Academy of Sciences(CAS)Shenyang110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang110016China

The influence of hot-deformation on the microstructure,crystalline orientation,and texture evolution of Ti6Al4V-5Cu,an antibacterial(α+β)titanium alloy,was *** alloy was deformed using a hot rolling process in 15%,58%,and 73%thickness reduction *** was found that the basal<α→>and pyramidaltype slip planes could be activated in theαphase,which dominated the deformation behavior of Ti6Al4V-5Cu *** various deformation conditions,the alloy revealed different microstructure *** the 15%hot rolled alloy,the deformation was performed by the breakdown of priorβgrain boundaries(GBβ),which was attributed to the formation of coarseαgrains,rotated nearly 45°with respect to the transversal and rolling *** presence of different sub-structure geometries made the interior grain size distribution *** the 58%hot rolled alloy,Ti2Cu intermetallic compound was found at theα/β***-resolution transmission electron microscopy investigation showed the occurrence of grain rotation in different crystallographic *** room temperature,the percentage elongation(El)of the alloy reached 23.15%on the 58%hot rolled *** the 73%deformed alloy,refined and randomly oriented characteristics of grains were obtained due to higher thickness reduction,which resulted from the segregation of very fine *** influence of grain rotation during a hot rolling process revealed that theα/βtexture fiber separation angle to maintain the Burger orientation relationship of{0001}α//{110}βplanes decreased with increase of the thickness reduction ratio when Ti6Al4V-5Cu alloy was deformed by a hot rolling *** of tensile{1012}<1011>and compressive{1122}<1123>twins on the deformation of the alloy was also studied.

关键词： Ti6Al4V-5Cu Hot rolling Microstructure Texture evolution Twining

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Crystal reconstruction of V_(2)O_(3)/carbon heterointerfaces via anodic hydration for ultrafast and reversible Mg-ion battery cathodes

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InfoMat 2024年第3期6卷 95-107页

作者： Gun Jang Yun Sang Joe Sang Joon Lee Hyun Gyu Cho Sang Ha Baek Peixun Xiong Kang Ho Shin Jeong Seok Yeon Min Su Kang Si Hyoung Oh Ho Seok Park School of Chemical Engineering Sungkyunkwan University(SKKU)SuwonRepublic of Korea Advanced Batteries Research Center Korea Electronics Technology InstituteSeongnamRepublic of Korea Korea Institute of Science and Technology SeoulRepublic of Korea SKKU Advanced Institute of Nano Technology(SAINT) Sungkyunkwan UniversitySuwonRepublic of Korea Department of Health Sciences and Technology Samsung Advanced Institute for Health Sciences and Technology(SAIHST)Sungkyunkwan UniversitySuwonRepublic of Korea SKKU Institute of Energy Science and Technology(SIEST) Sungkyunkwan UniversitySuwonRepublic of Korea

Magnesium-ion batteries(MIBs)have promising applications because of their high theoretical capacity and the natural abundance of magnesium ***,the kinetic performance and cyclic stability of cathode materials are limited by the strong interactions between Mg ions and the crystal ***,we demonstrate the unique Mg^(2+)-ion storage mechanism of a hierarchical accordion-like vanadium oxide/carbon heterointerface(V_(2)O_(3)@C),where the V_(2)O_(3) crystalline structure is reconstructed into a MgV_(3)O_(7)·H_(2)O phase through an anodic hydration reaction upon first cycle,for the improved kinetic and cyclic *** verified by in situ/ex situ spectroscopic and electrochemical analyses,the fast charge transfer kinetics of the V_(2)O_(3)@C cathode were due to the crystal-reconstruction and chemically coupled *** V_(2)O_(3)@C demonstrated an ultrahigh rate capacity of 130.4 mAh g^(-1)at 50000 mA g^(-1)and 1000 cycles,achieving a Coulombic efficiency of 99.6%.The high capacity of 381.0 mA h g^(-1)can be attributed to the reversible Mg^(2+)-ion intercalation mechanism observed in the MgV_(3)O_(7)·H_(2)O phase using a 0.3 M Mg(TFSI)2/ACN(H_(2)O)***,within the voltage range of 2.25 V versus Mg/Mg^(2+),the V_(2)O_(3)@C exhibited a capacity of 245.1 mAh g^(-1)when evaluated with magnesium metal in a 0.3 M Mg(TFSI)^(2+)0.25 M MgCl_(2)/DME *** research findings have important implications for understanding the relationship between the Mg-ion storage mechanism and reconstructed crystal phase of vanadium oxides as well as the heterointerface reconstruction for the rational design of MIB cathode materials.

关键词： anodic hydration reaction magnesium ion battery nano crystal vanadium oxide

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Effect of collective spin excitations on electronic transport in topological spin textures

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Physical Review B 2024年第1期110卷 014425-014425页

作者： Kohei Hattori Hikaru Watanabe Junta Iguchi Takuya Nomoto Ryotaro Arita Department of Applied Physics Research Center for Advanced Science and Technology Department of Physics Wako Saitama 351-0198 Japan

We develop an efficient real-time simulation method for the spin-charge coupled system in the velocity gauge. This method enables us to compute the real-time simulation for the two-dimensional system with a complex spin texture. We focus on the effect of the collective excitation of the localized spins on the electronic transport properties of the nontrivial topological state in real space. To investigate this effect, we calculate the linear optical conductivity by calculating the real-time evolution of the Kondo lattice model on the triangular lattice, which hosts an all-in/all-out (triple-Q) magnetic structure. In the linear conductivity spectra, we observe multiple peaks below the band gap regime, attributed to the resonant contributions of collective modes similar to the skyrmionic system, alongside broadband modifications resulting from off-resonant spin dynamics. This result shows that the collective excitation, similar to the skyrmionic system, influences the optical response of the electron systems based on symmetry analysis. We elucidate the interference between the contributions from the different spin excitations to the optical conductivity in the multiple-spin texture, pointing out the mode-dependent electrical activity. We show the complex interplay between the complex spin texture and the itinerant electrons in the two-dimensional spin-charge coupled system.

关键词： Magnetism Optical conductivity Noncollinear magnets Kondo lattice model

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Heat treatment effects on the metastable microstructure,mechanical property and corrosion behavior of Al-added CoCrFeMnNi alloys fabricated by laser powder bed fusion

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Journal of Materials science & technology 2023年第7期138卷 171-182页

作者： Decheng Kong Li Wang Guoliang Zhu Yiqi Zhou Xiaoqing Ni Jia Song Liang Zhang Wenheng Wu Wei Wu Cheng Man Da Shu Baode Sun Chaofang Dong Shanghai Key Laboratory of Advanced High-temperature Materials and Precision Forming School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China Shanghai Engineering Research Center of 3D Printing Materials Shanghai Research Institute of MaterialsShanghai 200437China School of Materials Science and Engineering Ocean University of ChinaQingdao 266100China

With the development of aerospace and transportation,high-strength structural materials manufactured by additive manufacturing techniques get more attention,which allows the production of counterparts with complex *** work investigates Al-added CoCrFeMnNi high-entropy alloys(Al-HEAs)pre-pared by laser powder bed fusion(PBF-LB),adding 4.4 wt.%Al reducing approximately 7%*** contribution of post-heat-treatment to microstructure,mechanical properties,and corrosion behaviors are *** cracking along with grain boundaries in the as-built PBF-LB Al-HEAs is determined,which comes from the residual liquid film as a larger solidification temperature range by adding *** PBF-LB Al-HEAs mainly consist of a face-centered cubic(FCC)matrix with Al/Ni/Mn decorated dislocation cells therein and a minor body-centered cubic(BCC)*** 850℃ annealing treatment,massive BCC phases(ordered NiAl and disordered Cr-rich precipitates)generate at the dislocation cell/grain bound-aries and the dislocation cells are still ***,the volume fraction of BCC phases and the dislocation cells vanish after 1150℃ solution *** a result,Al-HEA850 shows an over 1000 MPa yield strength with nearly no ductility(<3%);the Al-HEA1150 exhibits considerable strength-ductility ***,the Al-HEA850 demonstrates the worst pitting corrosion resistance due to the preferential dissolution of the NiAl precipitates in chloride-containing *** comparatively de-liberating the evolution of strength-ductility and localized corrosion,we built a framework about the effects of the heat treatment on the mechanical property and degradation behavior in additively manu-factured Al-added high-strength HEAs.

关键词： High entropy alloy Laser powder bed fusion Heat treatment Dislocation cell Mechanical property Corrosion behavior

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Intrinsic spin shielding effect in platinum-rare-earth alloy boosts oxygen reduction activity

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National science Review 2023年第9期10卷 136-145页

作者： Siyuan Zhu Mingzi Sun Bingbao Mei Liting Yang Yuyi Chu Zhaoping Shi Jingsen Bai Xian Wang Zheng Jiang Changpeng Liu Bolong Huang Junjie Ge Wei Xing State Key Laboratory of Electroanalytical Chemistry Laboratory of Advanced Power Sources Changchun Institute of Applied Chemistry Chinese Academy of Sciences School of Applied Chemistry and Engineering University of Science and Technology of China Department of Applied Biology and Chemical Technology The Hong Kong Polytechnic University Shanghai Synchrotron Radiation Facility Zhangjiang National LaboratoryShanghai Advanced Research InstituteChinese Academy of Sciences Dalian National Laboratory for Clean Energy Chinese Academy of Sciences

Oxygen reduction reactions（ORRs） involve a multistep proton-coupled electron process accompanied by the conversion of the apodictic spin *** the role of spin configurations of metals in the adsorption and desorption of oxygen intermediates during ORRs is critical for the design of efficient ORR ***,a platinum-rare-earth-metal-based alloy catalyst,Pt2Gd,is introduced to reveal the role of spin configurations in the catalytic activity of *** catalyst exhibits a unique intrinsic spin reconfiguration because of interactions between the Gd-4f and Pt-5d *** adsorption and desorption of the oxygen species are optimized by modifying the spin symmetry and electronic structures of the material for increased ORR *** Pt2Gd alloy exhibits a half-wave potential of 0.95 V and a superior mass activity of 1.5 A·mgPt-1in a 0.1 M HClO4electrolyte,as well as higher durability than conventional Pt/C *** calculations have proven that the spin shielding effect of Gd pairs increases the spin symmetry of Pt-5d orbitals and adsorption preferences toward spin-polarized intermediates to facilitate *** work clarifies the impact of modulating the intrinsic spin state of Pt through the interaction with the local high spin 4f orbital electrons in rare-earth metals,with the aim of boosting the spin-related oxygen reduction reaction,thus fundamentally contributing to the understanding of new descriptors that control ORR activity.

关键词： oxygen reduction reaction intermetallic compound spin effect rare-earth metal electrocatalysis

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Is the hardness of material harder than diamond reliable?

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Journal of Materials science & technology 2023年第13期144卷 111-117页

作者： Jin Liu Yongtao Zou Guodong David Zhan Pei Wang Xiaozhi Yan Duanwei He Liping Wang Institute of Atomic and Molecular Physics Sichuan UniversityChengdu 610065China School of Mechanical Engineering Jingchu University of TechnologyJingmen 448000China Academy for Advanced Interdisciplinary Studies and Department of PhysicsSouthern University of Science and TechnologyShenzhen 518055China Shenzhen Key Laboratory of Ultraintense Laser&Advanced Material Technology College of Engineering Physicsand Center for Advanced Material Diagnostic TechnologyShenzhen Technology UniversityShenzhen 518118China Drilling Technology Division Exploration and Petroleum Engineering Center-Advanced Research Center(EXPEC ARC)Saudi AramcoDhahran 31311Saudi Arabia

With the development of new synthesis methods and chemistries,a number of new superhard materials have been reported to be harder than *** such materials are highly desirable due to their wide-ranging applications,there are some inherent uncertainties in the methods utilized to determine and define the hardness of such *** this paper,we employed the standard Vickers diamond indenter and substitute indenters with the same shape to measure the hardness of nine ceramics and superhard materials within well-defined criteria and methodology,for the assessment of consistency in the hardness *** findings and the developed testing method in the current study have broad implications in characterizing new and emerging superhard materials,leading to new discoveries.

关键词： Vickers hardness Superhard materials Emerging materials Applicability

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Effect of Nitrogen and Sulfur Co‑Doped Graphene on the Electrochemical Hydrogen Storage Performance of Co_(0.9)Cu_(0.1)Si Alloy

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Acta Metallurgica Sinica(English Letters) 2023年第6期36卷 1023-1037页

作者： Wenhao Fan Jianxun Zhao Dayong Liu Qingcheng Liang Wanqiang Liu Qingshuang Wang Heng Liu Peng Chen Shang Gao Xinlong Bao Yong Cheng Xinwei Wang Xin Guo School of Materials Science and Engineering Changchun University of Science and TechnologyChangchun 130022China Engineering Research Center of Optoelectronic Functional Materials Ministry of EducationChangchun 130022China College of Electronic Science and Engineering Jilin UniversityChangchun 130022China School of Life Science and Technology Changchun University of Science and TechnologyChangchun 130022China Research Center for Nanotechnology Changchun University of Science and TechnologyChangchun 130022China Research Institute of Changchun University of Science and Technology in Chongqing Chongqing 401120China State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryCASChangchun 130022China

Co_(0.9)Cu_(0.1)Si alloy was prepared by mechanical alloying ***-doped graphene(NG)and nitrogen–sulfur codoped graphene(NSG)were prepared by hydrothermal method.5 wt%graphene oxide,NG and NSG were doped into Co_(0.9)Cu_(0.1)Si alloy,respectively,by ball milling to improve the electrochemical hydrogen storage performance of the composite material.X-ray diffraction and scanning electron microscopy were used to characterize the structure and morphology of the composite material,and the LAND battery test system and three-electrode battery system were used to test the electrochemical performance of the composite *** composite material showed better discharge capacity and better cycle stability than the pristine *** addition,in order to study the optimal ratio of NSG,3%,5%,7%and 10%of NSG were doped into Co_(0.9)Cu_(0.1)Si alloy,***_(0.9)Cu_(0.1)Si alloy doped with 5%NSG had the best performance among all the *** best discharge capacity was 580.1 mAh/g,and its highest capacity retention rate was 64.1%.The improvement in electrochemical hydrogen storage performance can be attributed to two *** the one hand,the electrocatalytic performance of graphene is improved by co-doping nitrogen and sulfur,on the other hand,graphene has excellent electrical conductivity.

关键词： Co_(0.9)Cu_(0.1)Si alloy Nitrogen-sulfur co-doped graphene(NSG) Composite material Electrochemical hydrogen storage

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