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Effect of Heat Treatment Process on Mechanical Properties and Microstructure of Modified CNS-ⅡF/M Steel

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Journal of Iron and Steel Research International 2011年第12期18卷 65-70页

作者： yanG Ying yan qing-zhi MA Rong GE Chang-chun School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China

Ferritic/martensitic（F/M） steels have been recommended as one of the candidate materials for supercritical water cooled reactor（SCWR） in-core components use for its high thermal conductivity,low thermal expansion coefficient and inherently good dimensional stability under irradiation condition in comparison to austenitic ***-Ⅱ F/M steel which has good mechanical properties was one of the 9-12Cr F/M steels designed for SCWR in the previous *** this study a modified CNS-Ⅱ F/M steel was used and it＇s ultimate tensile strength was 925 MPa at room temperature and 483 MPa at 600 ℃ after optimizing heat treatment *** ductile to brittle transition temperature of modified CNS-Ⅱ F/M steel is-55 ℃.Those are at the same level or even higher than that of CNS-Ⅱ and some commercial F/M steels nominated for SCWR in-core component *** transmission electron microscope（TEM） results showed that the mechanical properties of the tempered martensite was closely related to the decomposition stage of the martensite.

关键词： supercritical water reactor ferritic/martensitic steel cladding material

Corrosion Behavior of Ferritic/Martensitic Steels CNS-Ⅰ and Modified CNS-Ⅱ in Supercritical Water

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Journal of Iron and Steel Research International 2012年第5期19卷 69-73,36页

作者： yanG Ying yan qing-zhi yanG Ya-feng ZHANG Le-fu GE Chang-chun School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China School of Nuclear Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China

The corrosion behaviors of CNS-I and modified CNS-II were evaluated by exposing to superciritical water （SCW） at 550℃ and 25 MPa with a dissolved oxygen concentration of 200× 10 ^-9 for up to 1 000 h. Detailed corrosion results of these two alloys were provided, including the growth rate of the oxide scales, microstructure of the oxide scales, distribution of phases and alloying elements. The mass gains of CNS-I and modified CNS-II were 609.73 mg/dm2 and 459.42 mg/dm2 , respectively, after exposing to SCW for 1 000 h. A duplex oxide scale with an outer porous magnetite layer and an inner relatively dense magnetite/spinel-mixed layer was identified on CNS-I and modified CNS-II after the test. The oxide scales were rather porous at the beginning of the test but the porosity decreased with increase of the exposure duration. It was found that Fe was enriched in the outer oxide layer, Cr was enriched in the inner oxide layer and O existed at a very high concnetration in the whole oxide scale. Other alloying elements such as Mo, W, Mn were depleted from the outer oxide layer and showed slightly enrichment in the inner oxide layer. The distributution of Ni was different from other elements, it was enriched in the interface bewteen the base metal and the oxide scale and depleted in the outer and inner oxide layers.

关键词： ferritic/martensitic steel supercritical water corrosion kinetics oxide scale morphology and structure

First Results of Characterization of 9Cr-3WVTiTaN Low Activation Ferritic/Martensitic Steel

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Journal of Iron and Steel Research International 2010年第5期17卷 57-62页

作者： LI Xing-gang yan qing-zhi MA Rong WANG Hao-qiang GE Chang-chun Institute of Nuclear Materials School of Material Science and Engineering University of Science andTechnology Beijing Beijing 100083 China

Ferritic/martensitic steels with Cr of 9%-12% （in mass percent） are favourable candidates for fuel cladding tube and in-core components of supercritical water-cooled reactor. 9Cr-3WVTiTaN low activation ferritic/martensitic steel, designated as China Nuclear Steel- I （CNS- I ）, was patterned after T91 steel （modified 9Cr-lMo） for the reactor. The idea of low activation material and microalloy technology was introduced into the design of the steel. The hardening, tempering and transformation behaviour of CNS- I steel was investigated. The steel has advantages in tensile properties at elevated temperature relative to zircaloy that has been widely used as cladding material for conventional light water reactors. CNS- I steel exhibits tensile properties and impact toughness comparable to T91 steel which exhibits availability in the present fission reactors and fast breeder reactor but includes undesired radioactive elements such as molybdenum and niobium.

关键词： supercritical water-cooled reactor low activation ferritic/martensitic steel tension Charpy impact

Crystal Structures of Two New Monoprotonated Products of 1,4,7 trimethyl-1,4,7-triazacyclononane: （Me3〔9〕aneN3H）(SO3CF3) and （Me3〔9〕aneN3H）I

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Chinese Journal of Structural Chemistry 2000年第1期19卷 48-52页

作者： DENG Dao Lia * ZHANG yan Hui a DAI Cong Yun a ZENG Hong a yan zhi qing a YE Chang qing a Ronald Ha\|Ge ba (Unilever Research SIOC, 354 Fenglin Road, Shanghai 200032. China) b (Unilever Research Laboratorium, Olivier van Noor Unilever Research SIOC 上海 2 0 0 0 32 Unilever Research Laboratorium 荷兰 Vlaardinge

Two new monoprotonated products of macrocyclic polyamine 1,4,7 trimethyl 1,4,7 triazacyclononane(Me 3〔9〕aneN 3), (Me 3〔9〕aneN 3H)(SO 3CF 3) 1 (C 10 H 22 N 3O 3SF 3, M r =321.36) and (Me 3〔9〕aneN 3H)I 2 (C 9H 22 N 3I, M r =299.20) were obtained by the reactions of Me 3〔9〕aneN 3 and yttrium triflate or ytterbium diiodide as the unexpected products. The crystal structures of compounds 1 and 2 have been determined. Crystal 1 is orthorhombic, space group P2 12 12 1(#19), a =12.609(3), b=13.531(1), c=9.225(3) , V=1573.9(7)  3, Z=4, D c= 1.356 g/cm 3, μ =2.47 cm -1 , F (000)=680 and R=0.052, R w =0.052 for 807 unique reflections with I>2σ(I) . Crystal 2 belongs to the orthorhombic system with space group P2 12 12 1(#19), a=11.417(2), b=13.099(3), c=8.762(2) , V=1310.5(4)  3, Z=4, D c =1\^516 g/cm 3, μ =24.14 cm -1 , F (000)=600 and R=0.035, R w =0.042 for 1427 unique reflections with I>3σ(I) . The two structures contain the same cyclic framework in which the acid proton is bonded to an amine nitrogen. This proton exhibits strong intramolecular hydrogen bonds with the other two nitrogen atoms. The methyl groups are directed away from the ring cavity. The bond distance between acid proton and an amine nitrogen in compound 2 is extremely short. The bond angles for 1 and 2 also exhibit obvious diversity inside of triazacyclononae.

关键词： formation crystal structure protonation triazacyclononane

Prospects on mangrove knowledge services in the smart era:From plant atlas to knowledge graphs

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Science China Earth Sciences 2025年第1期68卷 111-127页

作者： zhi-Wei HOU Wenlong JING Cheng-zhi QIN Ji yanG qing XIA Xiaoling YIN Key Laboratory of Guangdong for Utilization of Remote Sensing and Geographical Information System Guangdong Open Laboratory of Geospatial Information Technology and ApplicationGuangzhou Institute of GeographyGuangdong Academy of SciencesGuangzhou510070China Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou511458China State Key Laboratory of Resources and Environmental Information System Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing100101China College of Resources and Environment University of Chinese Academy of SciencesBeijing100049China School of Traffic&Transportation Engineering Changsha University of Science and TechnologyChangsha410114China

Mangroves are crucial to the ecological security of the Earth and human *** management,conservation,and restoration are of great importance and necessitate the support of spatio-temporal information and multidisciplinary knowledge such as biology and *** knowledge services such as plant atlas provide illustrated textual knowledge of ***,this kind of service is oriented to information retrieval and is incapable of effectively mining and utilizing fragmented knowledge from multi-source heterogeneous data,facing the problem of“massive data,rare knowledge”.Knowledge graphs are capable of extracting,organizing,and fusing the knowledge contained in massive data into semantic networks that can be understood and computed by *** provide a solution for the realization of intelligent knowledge *** on the urgent need for mangrove knowledge acquisition,formal representation,and intelligent services,this paper proposes a research prospect on mangrove knowledge graphs and knowledge *** first analyze the similarities and differences between various domain-specific concepts of *** this basis,we define the mangrove knowledge graph as a large-scale knowledge base that integrates multi-disciplinary knowledge and spatio-temporal information with mangrove ecosystems as the ***,we propose a research framework for mangrove knowledge services that can realize the transformation from multi-modal data to intelligent knowledge services,including multiple research levels such as ubiquitous data sensing and aggregation,knowledge organization and graph construction,and intelligent mangrove knowledge ***,the methods and workflow for constructing mangrove knowledge graphs are ***,we discuss the challenges and possible future directions of mangrove knowledge services in the smart era,including the construction of a mangrove knowledge system that integrates the domain-specific charac

关键词： Mangrove Tupu Knowledge graph Multi-modal Knowledge service

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埕岛粉喷桩复合地基应力比试验

中国石油大学学报（自然科学版） 2011年第6期35卷 131-134页

作者：颜庆智闫相祯江立群中国石油大学储运与建筑工程学院山东青岛266555 中煤国际重庆分公司重庆400016

桩土应力比是反映桩体和桩间土协同工作的重要指标,也是复合地基承载力和沉降计算的重要参数,与地基土的物理力学性质密切相关,影响因素复杂。结合某大型工程,首次对埕岛软土上粉喷桩复合地基进行大型应力比试验,得到埕岛粉喷桩复合地... 详细信息

桩土应力比是反映桩体和桩间土协同工作的重要指标,也是复合地基承载力和沉降计算的重要参数,与地基土的物理力学性质密切相关,影响因素复杂。结合某大型工程,首次对埕岛软土上粉喷桩复合地基进行大型应力比试验,得到埕岛粉喷桩复合地基应力比随荷载、时间、褥垫层厚度、褥垫层刚度的变化规律,并进行有限元分析,对两种结果进行对比。结果表明:粉喷桩复合地基桩土应力比值没有时间效应;粉喷桩复合地基桩土应力比与褥垫层厚度负相关,一定厚度褥垫层可协调桩土工作,宜试验确定最佳厚度范围;应力比与褥垫层弹性模量正相关,模量达到某一值时桩土应力比不再变化,应根据桩体材料选用适当弹性模量褥垫材料;该地区粉喷桩复合地基桩土应力比主要分布在6.5～9.0。

关键词：埕岛软土粉喷桩复合地基褥垫层桩土应力比承载性能试验

Q235表面辉光等离子渗镀TiN耐蚀性研究

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材料工程 2006年第z1期34卷 193-195页

作者：刘燕萍闫志琴郝兴明太原理工大学机械工程学院太原030024

利用等离子辉光放电溅射技术,在碳钢表面复合渗镀形成TiN扩散层和沉积层。表面成分检测渗镀层呈梯度材料分布,表面钛原子和氮原子之比,符合TiN相结构。渗镀层总深度约有15μm,表层TiN约有4μm。渗镀层成分检测表明,与基体之间呈梯度分布... 详细信息

利用等离子辉光放电溅射技术,在碳钢表面复合渗镀形成TiN扩散层和沉积层。表面成分检测渗镀层呈梯度材料分布,表面钛原子和氮原子之比,符合TiN相结构。渗镀层总深度约有15μm,表层TiN约有4μm。渗镀层成分检测表明,与基体之间呈梯度分布。X射线衍射结果表明,渗镀层表面为TiN,其中(200)晶面的衍射峰最强,具有明显的择优取向。TiN复合层在H2S溶液中的腐蚀行为表明:辉光合成的TiN涂层可以提高材料在富液溶液中的耐蚀性能,与PVD沉积TiN试样和基体低碳钢试样相比耐蚀性分别提高了5.76,49.76倍。

关键词：等离子辉光放电 TiN层扩散层耐蚀性

Microstructural evolution during tempering process and mechanical properties of Cr-Ni-Mo-V/Nb high strength steel

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Journal of Iron and Steel Research International 2025年第1期32卷 270-281页

作者： Zi-wei Lv Jing Fan Rui Wang zhi-qiang Yu yan Kang Yong Hu Lei-feng Tuo Jürgen Eckert zhi-jie yan School of Materials Science and Engineering North University of ChinaTaiyuan 030051ShanxiChina Shanxi Key Laboratory of Advanced Metal Materials for Special Environments North University of ChinaTaiyuan 030051ShanxiChina School of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024ShanxiChina Erich Schmid Institute of Materials Science Austrian Academy of SciencesLeoben 8700Austria Department of Materials Science Chair of Materials PhysicsMontanuniversitat LeobenLeoben 8700Austria

High strength steels exhibit superior mechanical properties due to the unique microstructure,which successfully solves the drawback of the inevitable strength-toughness trade-off that occurs in traditional *** we investigated the effect of matrix and precipitates on mechanical properties of Cr-Ni-Mo-V/Nb steel after water quenching and tempering(150-500℃).The results showed that the microstructure of the present steel is noticeably tuned by changing the tempering *** excellent combination of strength(a yield strength of 1308 MPa with a total elongation of 8.2%)and toughness(Charpy V-notch impact toughness of 40.5 J/cm^(2))is obtained upon tempering at 200℃.This is attributed to the lath martensite containing high dislocation density,the martensite-twin substructure,and the strengthening effects of the precipitated needle-likeε-carbides and spherical VC *** acicularε-carbides are replaced by the rod-shaped Fe_(3)C at the tempering temperature of 350℃,resulting in the remarkable deterioration in strength,hardness,and *** carbides formed at a tempering temperature of 500℃ are beneficial to the enhancement of the elongation and toughness,but the strength decreases due to the matrix softening caused by the recovery of dislocation.

关键词： High strength steel Tempering Microstructure Carbide Mechanical property

Study on the Radiation Synthesis Mechanism and the Electrochemical Property of Polyaniline

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CHINESE JOURNAL OF POLYMER SCIENCE 2025年第2期43卷 328-340页

作者： yan, Shuo Guo, Zi-Fang Ge, zhi-qing Zhang, Bao-Ying Zhang, Ya-Ru Li, Yi-Shao Wang, Mo-Zhen Ge, Xue-Wu Univ Sci & Technol China Dept Polymer Sci & Engn State Key Lab Precis & Intelligent Chem Hefei 230026 Peoples R China Univ Sci & Technol China Sch Nucl Sci & Technol Hefei 230026 Peoples R China

As a highly promising conductive polymer material, the synthesis method, structure regulation, and performance improvement of polyaniline (PANI) are hot research topics. In this work, the radiation-induced polymerization of aniline in HNO3 solution was successfully achieved at room temperature without the use of chemical oxidants. Through the analysis of the radiation chemical reactions of inorganic acids and nitrate salt solutions, the characterization of the intermediate free radicals in the irradiated systems, and the influence of the pH of the solutions on the polymerization activity and product morphologies, the radiation-induced polymerization mechanism of aniline is discussed in detail and proposed. Only at a condition of [HNO3]>[aniline], i.e., pHNO3 generated by radiolysis reactions, and undergoes repeated three steps of monomer free radical recombination, deprotonation, and oxidation reaction of NO3, thus forming a PANI macromolecule. In addition to the polymerization reaction, the aniline units are protonated and oxidized because of the strongly acidity and oxidation of the reaction system under gamma-ray irradiation, which means that the molecular chain structure of the radiation-synthesized PANI can be regulated by pH, nitrate concentration, and irradiation conditions. Radiation-synthesized PANI has a moderate protonation and oxidation state, which can be used for the preparation of PANI supercapacitors with better electrochemical properties than those prepared by chemical oxidation under the same conditions. This work presents a new radiation-synthesis method and polymerization mechanism of PANI, which not only expands the application of radiation technique in the field of polymer synthesis, but also provides a new idea for the structural regulation and electrochemical p

关键词： Aniline Radiation-induced polymerization Polyaniline Electrochemical property