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Multi-performance evaluation of high-throughput accelerated corrosion test for high-strength low-alloy 921A steel

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Journal of Iron and Steel research(International) 2024年第5期31卷 1260-1278页

作者： Cong-cong Du Ming-hua Qin Zhan-fang Wu Dong-ling Li Lei Zhao Xiang-yang Li Hai-zhou Wang Beijing Advanced Innovation Center for materials Genome engineering National Center for Materials Service SafetyUniversity of Science and Technology BeijingBeijing100083China China Iron and Steel research Institute Group Co. Ltd.Beijing100081China Beijing Advanced Innovation Center for materials Genome engineering Central Iron and Steel Research InstituteBeijing100081China

The corrosion behavior of high-strength low-alloy 921A steel in a simulated marine atmospheric environment was studied using a high-throughput experimental method.The corrosion behavior,corrosion morphology,and corrosion products of 921A steels were analyzed using various techniques,including corrosion mass loss method,polarization curve,white-light interferometry,scanning electron microscopy,energy-dispersive spectrometry,microbeam X-ray fluorescence spectrometry,X-ray diffraction technique,and X-ray photoelectron spectroscopy.The test results indicated that 921A steel exhibits better corrosion resistance than Q450NQR1 steel in simulated harsh atmospheric environments,as evidenced by a lower corrosion mass loss rate throughout the corrosion tests.The corrosion products of both steels consisted ofα-FeOOH,Fe_(3)O_(4),andγ-FeOOH,withα-FeOOH being more prevalent in the rust layer of 921A steel than in Q450NQR1 steel.The inner rust layer of 921A steel also exhibited an appositional enrichment region of Cr,Ni,Mo,and V,leading to its superior corrosion resistance compared to that of Q450NQR1 steel.The efficacy of high-throughput accelerated corrosion experimental methods was highlighted for evaluating the corrosion resistance of steel materials in harsh environmental conditions.The findings suggest that 921A steel exhibits better corrosion resistance compared to Q450NQR1 steel and has the potential to be more suitable in harsh marine atmospheric environments.The characterization of the rust layer structures and composition reveals the parallel enrichment of certain elements in the inner rust layer of 921A steel,which enhances its corrosion resistance.

关键词： Atmospheric corrosion High-throughput experimental method High-strength low-alloy steel Corrosion characteristics Rust layer Element enrichment

Unscented Kalman filter for a low-cost GNSS/IMU-based mobile mapping application under demanding conditions

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Geodesy and Geodynamics 2024年第2期15卷 166-176页

作者： Mokhamad Nur Cahyadi Tahiyatul Asfihani Hendy Fitrian Suhandri Risa Erfianti Department of Geomatics engineering Institut Teknologi Sepuluh NopemberSurabaya 6011Indonesia research Center of marine and Earth Science technology Directorate of Research and Community ServiceInstitut Teknologi Sepuluh NopemberSurabaya 60111Indonesia Department of Mathematics Institut Teknologi Sepuluh NopemberSurabaya 60111Indonesia centre of Studies for Surveying Science&Geomatics Universiti Teknologi Mara(UiTM)Shah Alam 40450Malaysia

For the last two decades,low-cost Global Navigation Satellite System(GNSS)receivers have been used in various applications.These receivers are mini-size,less expensive than geodetic-grade receivers,and in high demand.Irrespective of these outstanding features,low-cost GNSS receivers are potentially poorer hardwares with internal signal processing,resulting in lower quality.They typically come with low-cost GNSS antenna that has lower performance than their counterparts,particularly for multipath mitigation.Therefore,this research evaluated the low-cost GNSS device performance using a high-rate kinematic survey.For this purpose,these receivers were assembled with an Inertial Measurement Unit(IMU)sensor,which actively transmited data on acceleration and orientation rate during the observation.The position and navigation parameter data were obtained from the IMU readings,even without GNSS signals via the U-blox F9R GNSS/IMU device mounted on a vehicle.This research was conducted in an area with demanding conditions,such as an open sky area,an urban environment,and a shopping mall basement,to examine the device’s performance.The data were processed by two approaches:the Single Point Positioning-IMU(SPP/IMU)and the Differential GNSS-IMU(DGNSS/IMU).The Unscented Kalman Filter(UKF)was selected as a filtering algorithm due to its excellent performance in handling nonlinear system models.The result showed that integrating GNSS/IMU in SPP processing mode could increase the accuracy in eastward and northward components up to 68.28%and 66.64%.Integration of DGNSS/IMU increased the accuracy in eastward and northward components to 93.02%and 93.03%compared to the positioning of standalone GNSS.In addition,the positioning accuracy can be improved by reducing the IMU noise using low-pass and high-pass filters.This application could still not gain the expected position accuracy under signal outage conditions.

关键词： LoW-cost GNSS GNSS/IMU Single Point Positioning-IMU(SPP/IMU) Differential GNSS-IMU(DGNSS/IMU) Unscented Kalman Filter(UKF) Outageconditions

Vacancy defect MoSeTe embedded in N and F co-doped carbon skeleton for high performance sodium ion batteries and hybrid capacitors

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Journal of Energy Chemistry 2024年第3期90卷 652-664,I0014页

作者： Dehui Yang Wentao Guo Fei Guo Jiaming Zhu Gang Wang Hui Wang Guanghui Yuan Shenghua Ma Beibei Wang State Key Laboratory of Photon-technology in Western China Energy International Collaborative Center on Photoelectric Technology and Nano Functional MaterialsInstitute of Photonics&Photon-TechnologyNorthwest UniversityXi’an 710127ShannxiChina Key Laboratory of Synthetic and Natural Functional Molecule Chemistry(Ministry of Education) College of Chemistry&Materials ScienceNorthwest UniversityXi’an 710127ShannxiChina School of Chemistry and Chemical engineering Ankang Research Centre of New Nano-materials Science and TechnologyShaanxi University Innovation Research Institute of Advanced Energy Storage Materials and Battery Technology for Future IndustrializationAnkang UniversityAnkang 725000ShannxiChina

Sodium-ion batteries(SIBs) and hybrid capacitors(SIHCs) have garnered significant attention in energy storage due to their inherent advantages,including high energy density,cost-effectiveness,and enhanced safety.However,developing high-performance anode materials to improve sodium storage performa nce still remains a major challenge.Here,a facile one-pot method has been developed to fabricate a hybrid of MoSeTe nanosheets implanted within the N,F co-doped honeycomb carbon skeleton(MoSeTe/N,F@C).Experimental results demonstrate that the incorporation of large-sized Te atoms into MoSeTe nanosheets enlarges the layer spacing and creates abundant anion vacancies,which effectively facilitate the insertion/extraction of Na^(+) and provide numerous ion adsorption sites for rapid surface capacitive behavior.Additionally,the heteroatoms N,F co-doped honeycomb carbon skeleton with a highly conductive network can restrain the volume expansion and boost reaction kinetics within the electrode.As anticipated,the MoSeTe/N,F@C anode exhibits high reversible capacities along with exceptional cycle stability.When coupled with Na_(3)V_(2)(PO_(4))_(3)@C(NVPF@C) to form SIB full cells,the anode delivers a reversible specific capacity of 126 mA h g^(-1) after 100 cycles at 0.1 A g^(-1).Furthermore,when combined with AC to form SIHC full cells,the anode demonstrates excellent cycling stability with a reversible specific capacity of50 mA h g^(-1) keeping over 3700 cycles at 1.0 A g^(-1).In situ XRD,ex situ TEM characterization,and theoretical calculations(DFT) further confirm the reversibility of sodium storage in MoSeTe/N,F@C anode materials during electrochemical reactions,highlighting their potential for widespread practical application.This work provides new insights into the promising utilization of advanced transition metal dichalcogenides as anode materials for Na^(+)-based energy storage devices.

关键词： MoSeTe N F co-doped honeycomb carbon skeleton Sodium-ion batteries Sodium-ion hybrid capacitor

调节铜催化剂表面分子亲电性以调控电催化二氧化碳还原选择性

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Science China materials 2024年第6期67卷 1858-1865页

作者：周贤龙单洁琼郑敏李欢夏宝玉郑尧 School of Chemical engineering and Advanced materials The University of AdelaideAdelaideSA 5005Australia Key Laboratory of Material Chemistry for Energy Conversion and Storage(Ministry of Education) Hubei Key Laboratory of Material Chemistry and Service FailureNational Laboratory for OptoelectronicsSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan 430074China Jiangsu Co-Innovation centre of Efficient Processing and Utilization of Forest Resources College of Chemical EngineeringNanjing Forestry UniversityNanjing 210037China

Cu是唯一能选择性将二氧化碳电还原(CRR)为多碳产物的过渡金属.然而,调控Cu的CRR选择性获得多种产物仍非常具有挑战性.本文选择了一系列具有不同亲电性的分子来修饰Cu催化剂以调控其CRR选择性,从而产生CH_(4)或C_(2)H_(4).理论计算表明... 详细信息

Cu是唯一能选择性将二氧化碳电还原(CRR)为多碳产物的过渡金属.然而,调控Cu的CRR选择性获得多种产物仍非常具有挑战性.本文选择了一系列具有不同亲电性的分子来修饰Cu催化剂以调控其CRR选择性,从而产生CH_(4)或C_(2)H_(4).理论计算表明,分子的亲电性决定催化反应中的质子活度,进而能促进或抑制CRR中的质子耦合电子转移(PCET)过程.实验发现,低亲电性分子(如1,2-双(4-吡啶基)乙烷)可以促进质子转移,加快^(*)CO中间体氢化过程而生成CH_(4),实现58.2%的法拉第效率;而高亲电性分子(如顺-1,2-双(4-吡啶基)乙烯)能构建强的氢键以稳定^(*)CO中间体,促进其偶联生成C_(2)H_(4),实现65.9%的法拉第效率.理论计算结合原位光谱表征揭示,分子亲电性可调节催化剂质子活度,影响CRR反应中^(*)CO氢化或偶联,进而调控CRR选择性.不同于常规的催化剂结构工程,本策略通过调节CRR中的PCET过程来调控选择性,为CRR的发展提供了新的认识.

关键词： molecular electrophilicity Cu catalysts proton transfer CO_(2)electroreduction C1/C2 selectivity

Effect of strain rate on fracture behaviour of Cr18Ni11Ti stainless steel at high temperatures

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Journal of Iron and Steel research(International) 2022年第6期29卷 1004-1011页

作者： Xin-li Song Chang-hu Huang Juan Jia Jing Liu The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081HubeiChina hubei engineering technology research Center of marine materials and service safety Wuhan 430081HubeiChina

The effect of strain rate on the fracture behaviour of Cr18Ni11Ti stainless steel at high temperatures was analysed.The steel was subjected to solid solution treatment at 1050°C and ageing at 650°C for 24 h.The high-temperature tensile properties of Cr18Ni11Ti stainless steel were subsequently investigated via high-temperature tensile testing at 650°C and different strain rates(1.43×10^(–1),1.43×10^(–2),1.43×10^(–3),1.43×10^(–4),and 1.43×10^(–5) s^(–1)).The microstructure,precipitated phase,tensile fracture surface,and dislocation of the experimental steel were analysed by scanning electron microscopy,transmission electron microscopy and energy spectrometry.The results show that Cr18Ni11Ti stainless steel is mainly austenite,with a large number of twin crystals,chromium-rich precipitated phase and composite precipitated phases of TiC and AlMgCaO.With decreases in strain rate,the yield strength,ultimate tensile strength,and reduction in area also decrease.When the strain rate is high,obvious necking and ductile fracture occur in the experimental steel.However,when the strain rate is reduced to 1.43×10^(–5) s^(–1),the necking phenomenon is not obvious and intergranular brittle fracture appears.Greater segregation of P and S contents at grain boundaries,or dislocation motion creep and grain-boundary sliding creep,leads to brittle fracture of the steel at lower strain rates of 1.43×10^(–4) to 1.43×10^(–5) s^(–1).

关键词： Stainless steel Strain rate High-temperature mechanical property Grain boundary segregation Dislocation

Influence of Irregular Coastlines on a Tornadic Mesovortex in the Pearl River Delta during the Monsoon Season. Part Ⅰ:Pre-storm Environment and Storm Evolution

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Advances in Atmospheric Sciences 2024年第6期41卷 1115-1131页

作者： Lanqiang BAI Dan YAO Zhiyong MENG Yu ZHANG Xianxiang HUANG Zhaoming LI Xiaoding YU Foshan Tornado research Center and China Meteorological Administration Tornado Key LaboratoryGuangdong Meteorological Serviceand Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Guangdong 528000China Meteorological Observation centre CMABeijing 100081China Department of Atmospheric and Oceanic Sciences and China Meteorological Administration Tornado Key LaboratorySchool of PhysicsPeking UniversityBeijing 100871China Guangzhou Meteorological Observatory CMAGuangdong 511430China Foshan Tornado research Center and China Meteorological Administration Tornado Key LaboratoryCMAGuangdong 528000China China Meteorological Administration Training Center CMABeijing 528000China

The Pearl River Delta(PRD),a tornado hotspot,forms a distinct trumpet-shaped coastline that concaves toward the South China Sea.During the summer monsoon season,low-level southwesterlies over the PRD’s sea surface tend to be turned toward the west coast,constituting a convergent wind field along with the landward-side southwesterlies,which influences regional convective weather.This two-part study explores the roles of this unique land–sea contrast of the trumpet-shaped coastline in the formation of a tornadic mesovortex within monsoonal flows in this region.Part I primarily presents observational analyses of pre-storm environments and storm evolutions.The rotating storm developed in a lowshear environment(not ideal for a supercell)under the interactions of three air masses under the influence of the land–sea contrast,monsoon,and storm cold outflows.This intersection zone(or“triple point”)is typically characterized by local enhancements of ambient vertical vorticity and convergence.Based on a rapid-scan X-band phased-array radar,finger-like echoes were recognized shortly after the gust front intruded on the triple point.Developed over the triple point,they rapidly wrapped up with a well-defined low-level mesovortex.It is thus presumed that the triple point may have played roles in the mesovortex genesis,which will be demonstrated in Part II with multiple sensitivity numerical simulations.The findings also suggest that when storms pass over the boundary intersection zone in the PRD,the expected possibility of a rotating storm occurring is relatively high,even in a low-shear environment.Improved knowledge of such environments provides additional guidance to assess the regional tornado risk.

关键词： tornado mesovortex surface boundary land–sea contrast monsoon

Progress in MXene-based catalysts for oxygen evolution reaction

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Electron 2024年第1期2卷 48-67页

作者： Jieli Chen Xiaohong Gao Jing Li Zhenye Kang Juan Bai Tianjiao Wang Yuliang Yuan Chenghang You Yu Chen Bao Yu Xia Xinlong Tian School of marine Science and engineering Hainan Provincial Key Lab of Fine ChemistrySchool of Chemistry and Chemical EngineeringHainan UniversityHaikouChina School of Chemistry and Physics Queensland University of TechnologyBrisbaneQueenslandAustralia Key Laboratory of Macromolecular Science of Shaanxi Province School of Materials Science and EngineeringShaanxi Normal UniversityXi'anChina School of Chemistry and Chemical engineering State Key Laboratory of Materials Processing and Die&Mould TechnologyKey Laboratory of Material Chemistry for Energy Conversion and Storage(Ministry of Education)Hubei Key Laboratory of Material Chemistry and Service FailureWuhan National Laboratory for OptoelectronicsHuazhong University of Science and Technology(HUST)WuhanChina

Electrochemical water splitting for hydrogen generation is considered one of the most promising strategies for reducing the use of fossil fuels and storing renewable electricity in hydrogen fuel.However,the anodic oxygen evolution process remains a bottleneck due to the remarkably high overpotential of about 300 mV to achieve a current density of 10 mA cm^(−2).The key to solving this dilemma is the development of highly efficient catalysts with minimized overpotential,long-term stability,and low cost.As a new 2D material,MXene has emerged as an intriguing material for future energy conversion technology due to its benefits,including superior conductivity,excellent hydrophilic properties,high surface area,versatile chemical composition,and ease of processing,which make it a potential constituent of the oxygen evolution catalyst layer.This review aims to summarize and discuss the recent development of oxygen evolution catalysts using MXene as a component,emphasizing the synthesis and synergistic effect of MXene-based composite catalysts.Based on the discussions summarized in this review,we also provide future research directions regarding electronic interaction,stability,and structural evolution of MXene-based oxygen evolution catalysts.We believe that a broader and deeper research in this area could accelerate the discovery of efficient catalysts for electrochemical oxygen evolution.

关键词： MXene-based catalysts oxygen evolution reaction water splitting

Numerical Analysis of the Influence of the Impinging Distance on the Scouring Efficiency of Submerged Jets

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Fluid Dynamics & materials Processing 2024年第2期20卷 429-445页

作者： Hao Chen Xianbin Teng Zhibin Zhang Faxin Zhu Jie Wang Zhaohao Zhang School of Naval Architecture and Maritime Zhejiang Ocean UniversityZhoushan316022China School of marine engineering Guangzhou Maritime UniversityGuangzhou510725China

Water jet technology is widely used in submerged buried pipes as a non-traditional trenching process,often invol-ving a complex sediment response.An important adjustable and inﬂuential engineering variable in this technol-ogy is represented by the impinging distance.In this study,the FLOW-3D software was used to simulate the jet scouring of sand beds in a submerged environment.In particular,four sets of experimental conditions were con-sidered to discern the relationship between the maximum scour depth and mass and the impinging distance.As shown by the results,a critical impinging distance h0 exists by which the static scour depth can be maximized;the scour mass ratio between dynamic and static conditions decreases as the impinging distance increases.Moreover,the proﬁle contours are similar when the erosion parameter Ec is in the range 0.35

关键词： Submerged jet impinging distance numerical simulation scour depth scour proﬁle

Synergistic effects of Nb and Mo on hydrogen-induced cracking of pipeline steels:A combined experimental and numerical study

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Journal of materials Science & technology 2023年第27期158卷 156-170页

作者： Shiqi Zhang Luming Qi Shilong Liu Zhixian Peng Y.Frank Cheng Feng Huang Jing Liu The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081China Institute of Advanced Steels and materials School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China Department of Mechanical engineering University of CalgaryCalgaryAB T2N 1N4Canada hubei engineering technology research centre of marine materials and service safety Wuhan University of Science and TechnologyWuhan 430081China

The synergistic effects of Nb and Mo on hydrogen-induced cracking(HIC)of pipeline steels were studied experimentally and numerically.The results showed that Mo was primarily segregated at grain-boundaries(GBs)or solid-dissolved in the matrix,while most Nb and a small amount of Mo formed dis-persed(Nb,Mo)C nano-precipitates and refined the microstructure.Compared with Nb alloying,the multi-ple additions of Nb-Mo played dual roles in affecting H diffusion:primarily,the H-traps densities such as GBs,precipitates,and solute Mo atoms increased,providing an advantage;however,Mo slightly reduced the H-trapping capacity of precipitates,playing an adverse role.Nonetheless,the beneficial effects far outweighed the adverse effects,thereby reducing H diffusivity and inhibiting crack initiation.Addition-ally,Nb and Mo hindered crack propagation synergistically as follows:(i)Mo enhanced GB cohesion by repelling H,impeding intergranular cracking and hydrogen-enhanced decohesion(HEDE);(ii)Nb reduced the proportion of3/high-angle grain boundaries,increasing cracking resistance;(iii)(Nb,Mo)C precip-itates impeded H-dislocation interactions,reducing the hydrogen-enhanced localized plasticity(HELP).

关键词： Hydrogen-induced cracking Nb-Mo microalloying Hydrogen permeation Precipitate Pipeline steel