检索结果-南通市图书馆

Mechanical performance of 22SiMn2TiB steel welded with lowtransformation- temperature filler wire and stainless steel filler wire

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2024年第4期31卷 967-981页

作者： Zi-dong lin Kai-jie Song Zhen Sun Zi-qian Zhu Xue-feng Zhao Constantinos Goulas Wei Ya Xing-hua Yu school of materials science and engineering Beijing Institute of TechnologyBeijing 100081China Beijing Institute of technology Chongqing Innovation Center Chongqing 401120China Department of Design Production and Management Faculty of Engineering Technology.University of TwenteEnschede 7500 AETheNetherlands Rotterdam Additive Manufacture Fieldlab(RAMLAB) Rotterdam 3089 JWTheNetherlands

TX-80 low-transformation-temperature(LTT)welding wire was used to replace the traditional ER 307Si welding wire to realize the connection of 22SiMn2TiB armor steel in manual overlay *** previously existing issues,such as welding cracks,large welding deformation,and severe welding residual stress,were solved to ensure good strength and ductility *** particular,with the same welding conditions,TX-80 LTT wire eliminates welding *** reduces the welding deformation no matter the base pretreatment of pre-setting angle or no pre-setting *** comparison,it was found that the microstructure at the TX-80 weld is mainly composed of martensite and a small amount of retained *** contrast,the microstructure of the ER 307Si weld consists of a large amount of austenite and a small amount of skeleton-like *** variation trend of residual stress and microhardness from the weld to the base were investigated and compared with the mechanical properties of base *** TX-80 and the ER 307Si tensile samples elongation is 6.76%and 6.01%,while the ultimate tensile strengths are 877 and 667 MPa,*** average impact toughness at room temperature of the ER 307Si weld is 143.9 J/cm^(2),much higher than that of the TX-80 weld,which is only 36.7 J/cm^(2).The relationship between impact and tensile properties with microstructure species and distribution was *** addition,the fracture surface of the tensile and the impact samples was observed and *** dimples,fewer pores,larger radiation zone,and shear lips of TX-80 samples indicate better tensile ductility and worse impact toughness than those of ER 307Si weld.

关键词： Low-transformation-temperature material 22SiMn2TiB steel Welding deformation Residual stress Martensitic transformation Mechanical property

Synergistic rare-earth yttrium single atoms and copper phosphide nanoparticles for high-selectivity ammonia electrosynthesis

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2024年第11期 5792-5801页

作者： Yi-Meng Cai Yang-hua Li Yi Xiao Quentin Meyer qian Sun Wan-Jing Lai Shu-Wen Zhao Jun Li lin-Jie Zhang Han Wang Zhang lin Jun Luo Li-Li Han school of materials science and engineering Institute for New Energy Materials and Low-Carbon TechnologiesTianjin University of Technology State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of Sciences school of Chemistry The University of New South Wales school of Metallurgy and Environment Central South University Chinese National engineering Research Center for Control & Treatment of Heavy Metal Pollution ShenSi Lab Shenzhen Institute for Advanced StudyUniversity of Electronic Science and Technology of China

Electrochemical nitrate reduction to NH3holds a great promise for N-upcycling in nature,while its sluggish reaction kinetics involved in both the stepwise deoxygenation and hydrogenation processes necessitates the development of bespoke catalysts with multi-site ***,we report a hybrid catalyst composed of rare-earth（RE） yttrium（Y） single atoms and copper phosphide（Cu3P） nanoparticles loaded on N,P-doped carbon(YSA-Cu3P/CNP) through a chelating and pyrolysis *** to a synergistic contribution of Y single atoms and Cu3P nanoparticles,YSA-Cu3P/CNP achieves an impressive NH3Faradaic efficiency（FE） of 92% at-0.5V（***） and the highest NH3yield rate of11.4 mg·h-1·cm-2at-0.6 V（***） in an alkaline media,which surpass most of the reported *** intricate reaction pathway has been explored by online differential electrochemical mass spectrometry（DEMS）,and the synergistic effect between Y single atoms and Cu3P nanoparticles has been studied by in situ synchrotron X-ray absorption ***,density-functional theory（DFT） calculations unveil that the high-efficiency nitrate reduction on YSA-Cu3P/CNP is attributed to a reduced energy barrier of the rate-determining deoxygenation step coupled with the enhanced stabilization of active hydrogen favorable for the hydrogenation steps,thereby boosting the overall reaction *** addition,a prototype Zn-nitrate battery utilizing YSA-Cu3P/CNP as the cathode is *** work not only elucidates the mechanism behind the enhanced catalytic performance but also paves the way for the future development of highefficiency electrocatalysts through dual-site engineering.

关键词：

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

GCr15环件冷轧-淬火中的组织演化

武汉理工大学学报 2010年第15期32卷 35-38页

作者：华林吴敏贾耿伟邵一川钱东升武汉理工大学材料科学与工程学院武汉430070

选取广泛应用的轴承材料GCr15钢进行了退火、冷轧成形、淬火实验。测试了冷轧前后环件的显微硬度变化和分布,观察了原始环件、冷轧成形环件、淬火环件和冷轧-淬火环件试样的组织状态和变化。揭示了GCr15钢在冷轧-淬火工艺中的微观组织... 详细信息

选取广泛应用的轴承材料GCr15钢进行了退火、冷轧成形、淬火实验。测试了冷轧前后环件的显微硬度变化和分布,观察了原始环件、冷轧成形环件、淬火环件和冷轧-淬火环件试样的组织状态和变化。揭示了GCr15钢在冷轧-淬火工艺中的微观组织演化规律,阐明了冷轧-淬火工艺对轴承环产品性能的影响机理,为轴承环件产品冷轧-淬火组织性能控制提供了依据。

关键词：环件冷轧淬火 GCr15钢组织演化

A phenomenological model for plastic flow behavior of rotating band material with a large temperature range

在线全文

学校读者我要写书评

暂无评论

Defence technology（防务技术） 2023年第7期25卷 121-133页

作者： Yi-cheng Zhu Jia-wei Fu lin-fang qian Jing-hua Cao school of Mechanical engineering Nanjing University of Science and TechnologyNanjing210094JiangsuChina Northwest Institute of Mechanical and Electrical engineering Xianyang712099ShaanxiChina school of materials science and engineering Nanjing University of Science and TechnologyNanjing210094China

The plastic flow behavior of the rotating band material is investigated in this paper. The rotating band material is processed from H96 brass alloy, which is hardened to a much higher yield strength compared to the annealed one. The dynamically uniaxial compression behavior of the material is tested using the split Hopkinson pressure bar(SHPB) with temperature and strain rate ranging from 297 to 1073 K and500 to 3000 s^(-1), respectively, and a phenomenological plastic flow stress model is developed to describe the mechanical behavior of the material. The material is found to present noticeable temperature sensitivity and weak strain-rate sensitivity. The construction of the plastic flow stress model has two steps. Firstly, three univariate stress functions, taking plastic strain, plastic strain rate and temperature as independent variable, respectively, are proposed by fixing the other two variables. Then, as the three univariate functions describe the special cases of flow stress behavior under various conditions, the principle of stress compatibility is adopted to obtain the complete flow stress function. The numerical results show that the proposed plastic flow stress model is more suitable for the rotating band material than the existing well-known models.

关键词： Rotating band Plastic flow behavior Large temperature range Phenomenological model

Frontiers in high entropy alloys and high entropy functional materials

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2024年第10期43卷 4639-4776页

作者： Wen-Tao Zhang Wen huang Fu-Jie Yu Qi Zhao Xin-Dong Zhu Tao Feng Yao Jiang Xiao-Ming Li Xue-Fei Miao He Zhu Si Lan Xue-qian Wang Bao-Long Shen Zhe Jia Feng-Qi Zhang Wei Wang Qi Liu Yang Ren Xun-Li Wang Xiao-Ya Cui Xiao-Yang Wang Ya-Nan Chen Bing-Bing Fan Meng-Ru Li Qi-Long Gao Jia-Ming Guo Zeng-Bao Jiao Zhi-Min Guo Yu-Ping Zhao qian Yu Rui huang ling-Kun Zhang Yi-Ping Lu Xu-Bo Li huai-Jun lin Yan Ma Wei-Ming Yang Zhi-hua Shen Hai-Yan He Yong-Gang Sun Yong-Jiang huang De-Zhuang Wang Qing-Feng Liu Fei-Yang Wang Hui Liu Hong-Hui Wu Li-qiang Wang Yang Lu Nan Wang Tian-Li Wang Wei-Bing Liao Yi-Han Wang Yuan Wu Yu-Zhen Yin Jie Pan Yi Zhang Qing Wang Jian-Yang Zhang Tao Yang Yasir Sohail Jin-Yu Zhang hua Ji qiang Li Wei-Di Liu Zhi-Gang Chen Xiong-Jun Liu Wen Ma Liang Mao Zhen-Duo Wu school of materials science and engineering Nanjing University of Science and Technology Jiangsu Key Laboratory for Advanced Metallic materials School of Materials Science and Engineering Southeast University Department of Physics City University of Hong Kong school of materials science and engineering Tianjin University school of Physics and Microelectronics Zhengzhou University Department of Mechanical engineering Research Institute for Advanced Manufacturing The Hong Kong Polytechnic University Center of Electron Microscopy and State Key Laboratory of Silicon materials School of Materials Science and Engineering Zhejiang University Key Laboratory of Solidification Control and Digital Preparation technology (Liaoning Province) School of Materials Science and Engineering Dalian University of Technology Institute of Advanced Wear & Corrosion Resistance and Functional materials Jinan University school of Mechanics and Civil engineering China University of Mining and Technology school of Physical sciences Great Bay University school of materials science andengineering Harbin Institute of Technology State Key Laboratory of materials-Oriented Chemical engineering College of Chemical Engineering Nanjing Tech University Beijing Advanced Innovation Center for materials Genome engineering Research Institute for Carbon Neutrality University of Science and Technology Beijing Department of Mechanical engineering The University of Hong Kong school of Computing Macquarie University Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic Engineering Shenzhen University State Key Laboratory for Advanced Metals and materials University of Science and Technology Beijing State Key Laboratory of materials Processing and Die & Mould technology School of Materials Science and Engineering Huazhong University of Science and Technology Institute of materials Shanghai University Department of materials science and engineering C

Owing to their exceptional properties, high-entropy alloys(HEAs) and high-entropy materials have emerged as promising research areas and shown diverse applications. Here,the recent advances in the field are comprehensively reviewed,organized into five sections. The first section introduces the background of HEAs, covering their definition, significance,application prospects, basic properties, design principles, and microstructure. The subsequent section focuses on cutting-edge high-entropy structural materials, highlighting developments such as nanostructured alloys, grain boundary engineering,eutectic systems, cryogenic alloys, thin films, micro-nano-lattice structures, additive manufacturing, high entropy metallic glasses, nano-precipitate strengthened alloys, composition modulation, alloy fibers, and refractory systems. In the following section, the emphasis shifts to functional materials, exploring HEAs as catalysts, magneto-caloric materials, corrosion-resistant alloys, radiation-resistant alloys, hydrogen storage systems, and materials for biomedicine. Additionally, the review encompasses functional high-entropy materials outside the realm of alloys, including thermoelectric, quantum dots, nanooxide catalysts, energy storage materials, negative thermal expansion ceramics,and high-entropy wave absorption materials. The paper concludes with an outlook, discussing future directions and potential growth areas in the field. Through this comprehensive review,researchers, engineers, and scientists may gain valuable insights into the recent progress and opportunities for further exploration in the exciting domains of high-entropy alloys and functional materials.

关键词： Cutting-edge structural materials Cutting-edgefunctional materials High entropy alloys

“双碳”目标下安徽省农业活动甲烷排放量研究

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

辽东学院学报（自然科学版） 2024年第1期31卷 1-9页

作者：叶舟孙雨娟华飞陈倩倩张祥林芜湖职业技术学院材料工程学院安徽芜湖241002 芜湖市环境监测与控制工程技术研究中心安徽芜湖241002 安徽师范大学生态与环境学院安徽芜湖241003

基于安徽省农业活动水平数据,以2009年为基准年,使用排放因子与稻田甲烷排放模型相结合的方法,估算2009—2022年安徽省农业活动甲烷排放量。计算结果表明:2009—2022年安徽省农业甲烷排放总量为1042.67×10^(4)t,整体呈上升趋势;不同农... 详细信息

基于安徽省农业活动水平数据,以2009年为基准年,使用排放因子与稻田甲烷排放模型相结合的方法,估算2009—2022年安徽省农业活动甲烷排放量。计算结果表明:2009—2022年安徽省农业甲烷排放总量为1042.67×10^(4)t,整体呈上升趋势;不同农业领域的甲烷排放量差异明显,稻田甲烷排放量占比最大,约占总排放量的69%,其次是动物肠道发酵甲烷排放约占总排放量的19%,动物粪便管理甲烷排放量约占12%。使用数学建模软件MATLAB对2023年安徽省稻田甲烷排放量进行预测,排放预测量为52.59×10^(4)t,表明“双碳”目标提出后安徽省稻田甲烷排放量整体呈现逐年减少的良好趋势。

关键词：温室气体农业甲烷排放安徽省双碳

A lattice Boltzmann–cellular automaton study on dendrite growth with melt convection in solidification of ternary alloys

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2018年第8期27卷 582-592页

作者： Dong-Ke Sun Zhen-hua Chai qian Li Guang lin school of Mechanical engineering Southeast UniversityNanjing 211189China Open Project of State Key Laboratory of Advanced Special Steel Shanghai UniversityShanghai 2E0444China school of Mathematics and Statistics Huazhong University of Science and TechnologyWuhan 431）074China school of materials science and engineering ＆ materials Genome Institute Shanghai Uniwrsity Shanglmi 200444China Department of Mathematics School of Mechanical EngineeringPurdue UniversityVCesl LafityetteIV 47907USA

A lattice Boltzmann （LB）-cellular automaton （CA） model is employed to study the dendrite growth of A1-4.0 wt%Cu- 1.0 wt%Mg alloy. The effects of melt convection, solute diffusion, interface curvature, and preferred growth orientation are incorporated into the coupled model by coupling the LB-CA model and the CALPHAD-based phase equilibrium solver, PanEngine. The dendrite growth with single and multiple initial seeds was numerically studied under the conditions of pure diffusion and melt convection. Effects of initial seed number and melt convection strength were characterized by new- defined solidification and concentration entropies, The numerical result shows that the growth behavior of dendJ-ites, the final microstructure, and the micro-segregation are significantly influenced by melt convection during solidification of the ternary alloys. The proposed solidification and concentration entropies are useful characteristics bridging the solidification behavior and the microstructure evolution of alloys.

关键词： lattice Boltzmann dendritic growth numerical simulation melt convection

Annealing atmosphere-dependent capacitive energy storage

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2023年第5期42卷 1465-1471页

作者： Bing-Bing Yang Hai-Yun Tong Shun Lan Yi-qian Liu Lv-Ye Dou Hao Pan Yuan-hua lin State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing100084China school of Physics and materials engineering Hefei Normal UniversityHefei230601China Department of materials science and engineering University of CaliforniaBerkeley94720USA

Electrostatic capacitors based on dielectrics with high energy density and efficiency are desired for modern electrical systems owing to their intrinsic fast charging-discharging speed and excellent *** longstanding bottleneck is their relatively small energy ***,we report enhanced energy density and efficiency in the Aurivillius Pb_(2)Bi_(4)Ti_(5)O_(18)films by controlling the post-annealing *** results demonstrate that the fabrication atmosphere has significant effects on the film texture and *** the increase of the oxygen pressure of annealing atmosphere,the Pb_(2)Bi_(4)Ti_(5)O_(18)films show a preferred growth orientation of(00l)and fewer defects,which leads to a higher polarization and breakdown field for the film annealed in air atmosphere and thus help to achieve an ultrahigh energy density of59.4 J·cm^(-3)and an improved efficiency of 81.2%.Moreover,the film also exhibits excellent cycling reliability and good thermal *** Pb_(2)Bi_(4)Ti_(5)O_(18)films show a significant potential application for dielectric capacitors.

关键词： Aurivillius phase film Annealing atmosphere Energy density Efficiency

High energy storage capability of perovskite relaxor ferroelectrics via hierarchical optimization

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2022年第3期41卷 730-744页

作者： Min-Hao Zhang Jun-Lei Qi Yi-qian Liu Shun Lan Zi-Xi Luo Hao Pan Yuan-hua lin State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Innovation Team for New High Volumetric Efﬁcient MLCC materials and Devices Foshan(Southern China)Institute for New MaterialsFoshan 528000China Division of Physics and Applied Physics School of Physical and Mathematical SciencesNanyang Technological UniversitySingapore 639798Singapore

Ultrafast charge/discharge process and ultrahigh power density enable dielectrics essential components in modern electrical and electronic devices, especially in pulse power systems. However, in recent years, the energy storage performances of present dielectrics are increasingly unable to satisfy the growing demand for miniaturization and integration, which stimulates further researches on dielectrics with higher energy density and *** various inorganic dielectrics, perovskite relaxor ferroelectrics are recognized as promising candidates for energy storage applications, with high permittivity and relatively high efficiency. Here, we focus on recent progress and achievements on optimizing perovskite relaxor ferroelectrics toward better energy storage capability through hierarchical design. The principles and key parameters of dielectric energy storage, together with the definition of majority types of dielectrics, are introduced at first. Strategies within various scales include domain, grain size, orientation, and composite engineering are summarized. The existing challenges are presented and future prospects are proposed in the end, with the background of both academic explorations and industrial applications.

关键词： Dielectric Energy storage Capacitance Perovskite Relaxor ferroelectric