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Journal of Iron and Steel Research International 2020年第9期27卷 1087-1098页

作者： Tao Wang Mei Zhang Ren-dong Liu Liang Zhang Lin Lu wen-heng wu Shanghai Research Institute of Materials Shanghai Engineering Research Center of 3D Printing MaterialsShanghai 200437China School of Materials Science and Engineering Shanghai UniversityShanghai 200072China State Key Laboratory of Advanced Special Steels Shanghai UniversityShanghai 200072China Technique Center of Ansteel Ansteel Group CorporationAnshan 114001LiaoningChina

The weldability of 0.28C-2.0Mn-0.93Al-0.97Si(wt.%)transformation induced plasticity(TRIP)steels was investigated using a 2.5 kW CO2 laser at the welding speeds of 2,2.5 and 3 m/*** welded joints were characterized in terms of hardness,tensile properties and ***-quality welded joints of TRIP steels with the carbon equivalent of 0.7 were *** loss of ductility,nearly unvaried hardness of the fusion zone(FZ)and tensile strength equal to the base metal were observed with increasing welding *** martensite and lower bainite formed in FZ and the microstructure of FZ varied little with welding *** thermal simulations of heat-afected zone(HAZ)were carried out using a quenching dilatometer,and the microstructures of dilatometric samples revealed the carbon diffusion-controlled transformations in *** microstructure distribution of HAZ could be influenced by the welding speed due to the significant temperature gradient over the narrow HAZ.

关键词： Laser welding Welding speed Transformation induced plasticity steel Tensile property Weld thermal simulation Microstructural evolution

Anisotropy in mechanical properties and corrosion resistance of 316L stainless steel fabricated by selective laser melting

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International Journal of Minerals,Metallurgy and Materials 2019年第3期26卷 319-328页

作者： Xiao-qing Ni De-cheng Kong Ying wen Liang Zhang wen-heng wu Bei-bei He Lin Lu De-xiang Zhu Shanghai Engineering Research Center of 3D Printing Materials Shanghai Research Institute of Materials Corrosion and Protection Center Key Laboratory for Corrosion and Protection (MOE) University of Science and Technology Beijing

The corrosion behavior and mechanical properties of 316 L stainless steel(SS) fabricated via selective laser melting(SLM) were clarified by potentiodynamic polarization measurements, immersion tests, and tensile experiments. The microstructural anisotropy of SLMed 316 L SS was also investigated by electron back-scattered diffraction and transmission electron microscopy. The grain sizes of the SLMed 316 L SS in the XOZ plane were smaller than those of the SLMed 316 L SS in the XOY plane, and a greater number of low-angle boundaries were present in the XOY plane, resulting in lower elongation for the XOY plane than for the XOZ plane. The SLMed 316 L was expected to exhibit higher strength but lower ductility than the wrought 316 L, which was attributed to the high density of dislocations. The pitting potentials of the SLMed 316 L samples were universally higher than those of the wrought sample in chloride solutions because of the annihilation of MnS or(Ca,Al)-oxides during the rapid solidification. However, the molten pool boundaries preferentially dissolved in aggressive solutions and the damage of the SLMed 316 L in FeCl3 solution was more serious after long-term service, indicating poor durability.

关键词： selective laser melting mechanical property corrosion resistance 316L stainless steel anisotropy molten pool boundary

Bioinspired Ultrasensitive Flexible Strain Sensors for Real‑Time Wireless Detection of Liquid Leakage

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Nano-Micro Letters 2025年第3期17卷 310-327页

作者： Weilong Zhou Yu Du Yingying Chen Congyuan Zhang Xiaowei Ning heng Xie Ting wu Jinlian Hu Jinping Qu Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of EducationHubei Key Laboratory of Material Chemistry and Service Failure and Hubei Engineering Research Center for Biomaterials and Medical Protective MaterialsSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan 430074People’s Republic of China School of Materials Science and Engineering Wuhan Institute of TechnologyWuhan 430205People’s Republic of China Department of Biomedical Engineering City University of Hong KongHong KongSAR 999077People’s Republic of China

Liquid leakage of pipeline networks not only results in considerableresource wastage but also leads to environmental pollution and ecological *** response to this global issue, a bioinspired superhydrophobic thermoplastic polyurethane/carbon nanotubes/graphene nanosheets flexible strain sensor (TCGS) hasbeen developed using a combination of micro-extrusion compression molding andsurface modification for real-time wireless detection of liquid leakage. The TCGSutilizes the synergistic effects of Archimedean spiral crack arrays and micropores,which are inspired by the remarkable sensory capabilities of scorpions. This designachieves a sensitivity of 218.13 at a strain of 2%, which is an increase of 4300%. Additionally, it demonstrates exceptional durability bywithstanding over 5000 usage cycles. The robust superhydrophobicity of the TCGS significantly enhances sensitivity and stability indetecting small-scale liquid leakage, enabling precise monitoring of liquid leakage across a wide range of sizes, velocities, and compositionswhile issuing prompt alerts. This provides critical early warnings for both industrial pipelines and potential liquid leakage scenariosin everyday life. The development and utilization of bioinspired ultrasensitive flexible strain sensors offer an innovative and effectivesolution for the early wireless detection of liquid leakage.

关键词： Thermoplastic polyurethane Bioinspired Cracks Liquid leakage Flexible strain sensor

对《质疑“回弹法检测混凝土抗压强度”》一文中几个问题的看法

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混凝土 2008年第6期 1-3页

作者：文恒武魏超琪陕西省建筑科学研究院陕西西安710082

混凝土的抗压强度与其测区的回弹值(表面硬度)之间有一定的关系,该关系是以大量的试验数据为依据并考虑其他影响因素,通过回归分析而建立的混凝土回弹值与抗压强度之间的数学表达式。回弹法用于检测混凝土的抗压强度已在我国得到了广泛... 详细信息

混凝土的抗压强度与其测区的回弹值(表面硬度)之间有一定的关系,该关系是以大量的试验数据为依据并考虑其他影响因素,通过回归分析而建立的混凝土回弹值与抗压强度之间的数学表达式。回弹法用于检测混凝土的抗压强度已在我国得到了广泛的应用,实践证明,采用回弹法推定的混凝土抗压强值,对于处理工程质量问题具有十分重要的意义。

关键词：混凝土回弹表面硬度抗压强度检测

Broadband and perfect terahertz absorber based on multilayer metamaterial with cross-ring patterned structures

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Optoelectronics Letters 2025年第1期21卷 1-6页

作者： wen Jin LIU Zhanzhi wu Zhengwei PAN Yu ZHANG Ying School of Science Xi'an Shiyou University Shaanxi Key Laboratory of Measurement and Control Technology for Oil and Gas Wells

Broadband and perfect terahertz absorber based on multilayer metamaterial using cross-ring patterned structures is proposed and investigated. The structure of the absorber is double absorption layers consisting of a chromium cross ring and eight isosceles right triangles. The unique structure of the double absorbing layers excites the electric dipole multimode resonance, giving rise to high absorption performance. Meanwhile, the influence of construal parameters on absorber behavior is also discussed. The numerical results show that the absorption achieves over 90% ranging from 2.45 THz to 6.25 THz and 99% absorption in the range of 3.7—5.3 THz. The realization of broadband and perfect absorber is described using the impedance matching principle. It is obviously found that the absorber is insensitive to the high angle of incidence for both transverse electric(TE) and transverse magnetic(TM) polarizations. Compared with the former reports, this absorber has remarkable improved absorption efficiency and smaller period. The terahertz absorber may be found applications in the fields of energy capture and thermal detection.

关键词： Metamaterials

JYC数字温度无线测温仪在郑西客运专线耐久性混凝土预制梁生产中的应用

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混凝土 2008年第12期 125-128页

作者：文恒武姚松林陕西省建筑科学研究院陕西西安710082 中铁十七局集团山西太原030006

采用JYC数字温度无线测温仪,监测客运专线耐久性混凝土预制梁生产中的养护条件,可以显示、储存混凝土内部各点温度,打印各测点温度值和温度变化曲线。保证混凝土的强度和耐久性的要求。

关键词：数字温度无线测温混凝土预制梁耐久性

Porous Organic Cage‑Based Quasi‑Solid‑State Electrolyte with Cavity‑Induced Anion‑Trapping Effect for Long‑Life Lithium Metal Batteries

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Nano-Micro Letters 2025年第2期17卷 376-386页

作者： Wei-Min Qin Zhongliang Li wen‑Xia Su Jia‑Min Hu Hanqin Zou Zhixuan wu Zhiqin Ruan Yue‑Peng Cai Kang Li Qifeng Zheng School of Chemistry South China Normal UniversityGuangzhou 510006People’s Republic of China Key Laboratory of Functional Metal‑Organic Compounds of Hunan Province College of Chemistry and Material ScienceHengyang Normal UniversityHengyang 421008People’s Republic of China Guangzhou Key Laboratory of Energy Conversion and Energy Storage Materials Guangzhou 510006People’s Republic of China

Porous organic cages(POCs)with permanent porosity and excellent host–guest property hold great potentials in regulating ion transport behavior,yet their feasibility as solid-state electrolytes has never been testified in a practical ***,we design and fabricate a quasi-solid-state electrolyte(QSSE)based on a POC to enable the stable operation of Li-metal batteries(LMBs).Benefiting from the ordered channels and cavity-induced anion-trapping effect of POC,the resulting POC-based QSSE exhibits a high Li+transference number of 0.67 and a high ionic conductivity of 1.25×10^(−4) S cm^(−1) with a low activation energy of 0.17 *** allow for homogeneous Li deposition and highly reversible Li plating/stripping for over 2000 *** a proof of concept,the LMB assembled with POC-based QSSE demonstrates extremely stable cycling performance with 85%capacity retention after 1000 ***,our work demonstrates the practical applicability of POC as SSEs for LMBs and could be extended to other energy-storage systems,such as Na and K batteries.

关键词： Porous organic cage Cavity-induced anion-trapping Quasi-solid-state electrolyte Homogeneous Li+flux Lithium metal battery

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西安田家湾粮库浅园仓顶防腐防水维修方案

粮食流通技术 2008年第3期 45-48页

作者：文恒武梁广学陕西省建筑科学研究院陕西西安710082 中储粮西安田家湾粮库陕西西安710082

针对粮食储备库浅园仓压型彩色钢板屋面出现的渗水、锈蚀情况,提出了刚柔结合的维修方案,既可以解决渗漏又能很好的保护彩钢板,延长屋面的使用寿命。

关键词：维修方案环氧树脂丙烯酸涂料施工工序

上覆荷载作用下钦州海积软土孔隙结构特征变化

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桂林理工大学学报 2017年第1期37卷 81-87页

作者：周东焦文灿吴恒刘汉民王业田广西大学土木建筑工程学院南宁530004 广西大学工程防灾与结构安全教育部重点实验室南宁530004

粘土孔隙结构特征对土体的水理性质和力学性状尤为重要。为探讨海相软粘土结构强度增长过程中孔隙的演化机制,以广西北部湾钦州地区海相软土为研究对象,通过对不同上覆荷载作用下的土样进行压汞仪法(MIP)试验和扫描电镜图像(SEM)分析,... 详细信息

粘土孔隙结构特征对土体的水理性质和力学性状尤为重要。为探讨海相软粘土结构强度增长过程中孔隙的演化机制,以广西北部湾钦州地区海相软土为研究对象,通过对不同上覆荷载作用下的土样进行压汞仪法(MIP)试验和扫描电镜图像(SEM)分析,揭示土样孔隙特征(尺度分布、平均孔径、孔隙体积密度和临界孔径)随上覆荷载的变化规律,以及其与土体渗透性、结构强度之间的联系。试验结果表明:上覆荷载作用下,土样孔隙呈大孔隙(>10μm)—中孔隙(1~10μm)—小孔隙(0.1~1μm)—微孔隙(<0.1μm)的演化趋势,大、中孔隙逐渐分裂和湮灭成小、微孔隙,但并非均是优先调整大孔隙来补偿小、微孔隙;平均孔径和临界孔径能直接反映孔隙结构特征的重分布和结构性演化,随着平均孔径的逐渐减小,土样的渗透性逐渐降低、结构强度逐渐增强;通过SEM图像分析,粘土结构演化过程呈蜂窝状结构—紊流状结构—粒状堆叠结构—胶粘式结构的发展趋势。

关键词：孔隙尺度分布平均孔径临界孔径结构强度渗透性

Comparative analysis of empirical and deep learning models for ionospheric sporadic E layer prediction

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Earth and Planetary Physics 2025年第1期9卷 10-19页

作者： BingKun Yu PengHao Tian XiangHui Xue Christopher JScott HaiLun Ye JianFei wu wen Yi TingDi Chen XianKang Dou Institute of Deep Space Sciences Deep Space Exploration LaboratoryHefei 230088China CAS Key Laboratory of Geospace Environment School of Earth and Space SciencesUniversity of Science and Technology of ChinaHefei 230026China Hefei National Laboratory University of Science and Technology of ChinaHefei 230088China Department of Meteorology University of ReadingReading RG66BBUK

Sporadic E(Es)layers in the ionosphere are characterized by intense plasma irregularities in the E region at altitudes of 90-130 *** they can significantly influence radio communications and navigation systems,accurate forecasting of Es layers is crucial for ensuring the precision and dependability of navigation satellite *** this study,we present Es predictions made by an empirical model and by a deep learning model,and analyze their differences comprehensively by comparing the model predictions to satellite RO measurements and ground-based ionosonde *** deep learning model exhibited significantly better performance,as indicated by its high coefficient of correlation(r=0.87)with RO observations and predictions,than did the empirical model(r=0.53).This study highlights the importance of integrating artificial intelligence technology into ionosphere modelling generally,and into predicting Es layer occurrences and characteristics,in particular.

关键词： ionospheric sporadic E layer radio occultation ionosondes numerical model deep learning model artificial intelligence