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Effects of Nb Addition on Charpy Impact Properties of TiVTa Refractory High‑Entropy Alloy

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Acta Metallurgica Sinica(English Letters) 2023年第3期36卷 405-416页

作者： Xue Yin Yan‑Kun Dou xin‑fu he Ke Jin Cheng‑Long Wang Ya‑Guang Dong Cun‑Yong Wang Yun‑Fei Xue Wen Yang Department of Reactor Engineering Technology Research China Institute of Atomic EnergyBeijing 102413China School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China Advance Research Institute of Multidisciplinary Science Beijing Institute of TechnologyBeijing 100081China

In the present study,the effects of Nb addition on Charpy impact properties of TiVTa refractory high-entropy alloy with high strength-ductility trade-off were systematically studied by using the instrumented Charpy impact testing *** experimental results showed that the impact toughness was remarkably improved by Nb addition in TiVTa to form TiVTaNb *** crack initiation energy and propagation energy of TiVTaNb were 67.3%and 24.9%higher than that of TiVTa,indicating that Nb addition simultaneously reinforced the resistance to crack initiation and *** impact fracture of TiVTaNb exhibited larger bending degree of shear lips,deeper dimples and more secondary cracks which effectively dissipated more impact *** deformation mechanism of TiVTa alloy was dominated by dislocation *** in TiVTaNb,the deformation mechanism was synergized by dislocation activities and deformation twinning,which were the main contributors for the improved impact properties and the stronger crack resistance of TiVTaNb alloy under impact loading.

关键词： Refractory high-entropy alloys Nb addition Impact property Crack resistance Deformation mechanism

Factors that Affect Social Stability of Rural Areas in Ganzi District

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Asian Agricultural Research 2011年第6期3卷 43-45,83页

作者： LUO Xue-ling LI Pei-lin fu xin-he Sichuan Agricultural University Ya’an 625014China

Through the sample investigation of Kangding County, Daofu County, Luhuo County and Xiangcheng County in Sichuan Province in 2010 and by combining the quantitative and qualitative methods, various kinds of indexes from the aspects of society, politics, economy and values in Ganzi District are analyzed, as well as the factors that affect the rural social stability of current Ganzi District area. The results show that rural areas of Ganzi District are stable on the whole, but the economic development level is backward; the social security measures are imperfect; disputes among rural residents still exist and most of them are economic disputes; the disputes among ethnics are mainly caused by religious belief; the autonomous situation of partial rural residents are bad and rural residents' evaluation on social justice is low. Therefore, it should establish and perfect relevant prevention and control mechanism.

关键词： Ethnic groups Rural areas Social stability China

Current development of body-centered cubic high-entropy alloys for nuclear applications

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Tungsten 2021年第2期3卷 197-217页

作者： Tan Shi Peng-Hui Lei Xu Yan Jing Li Yun-Di Zhou Yun-Peng Wang Zheng-Xiong Su Yan-Kun Dou xin-fu he Di Yun Wen Yang Chen-Yang Lu Department of Nuclear Science and Technology Xi’an Jiaotong UniversityXi’an 710049China China Institute of Atomic Energy Beijing 102413China

High-entropy alloys greatly expand the alloy design range and offer new possibilities for improving material *** on the worldwide research efforts in the last decade,the excellent mechanical properties and promising radiation and corrosion resistance of this group of materials have been ***-entropy alloys with body-centered cubic(BCC)structures,especially refractory high-entropy alloys,are considered as promising materials for high-temperature applications in advanced nuclear ***,the extreme reactor conditions including high temperature,high radiation damage,high stress,and complex corrosive environment require a comprehensive evaluation of the material properties for their actual service in nuclear *** review summarizes the current progress on BCC high-entropy alloys from the aspects of neutron economy and activation,mechanical properties,high-temperature stability,radiation resistance,as well as corrosion *** the current development of BCC high-entropy alloys for nuclear applications is still at an early stage as the large design space of this group of alloys has not been fully explored,the current research findings provide a good basis for the understanding and prediction of material behaviors with different compositions and *** in-depth understanding of the degradation mechanisms and characterization of material properties in response to conditions close to reactor environment are necessary.A critical down-selection of potential candidates is also crucial for further comprehensive evaluation and engineering validation.

关键词： Body-centered cubic high-entropy alloys Refractory high-entropy alloys Nuclear materials Radiation damage Tungsten

Bilevel Optimal Scheduling of Island Integrated Energy System Considering Multifactor Pricing

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Energy Engineering 2025年第1期122卷 349-378页

作者： xin Zhang Mingming Yao Daiwen he Jihong Zhang Peihong Yang Xiaoming Zhang School of Automation and Electrical Engineering Inner Mongolia University of Science and TechnologyBaotou014010China

In this paper,a bilevel optimization model of an integrated energy operator(IEO)–load aggregator(LA)is constructed to address the coordinate optimization challenge of multiple stakeholder island integrated energy system(IIES).The upper level represents the integrated energy operator,and the lower level is the electricity-heatgas load *** to the benefit conflict between the upper and lower levels of the IIES,a dynamic pricing mechanism for coordinating the interests of the upper and lower levels is proposed,combined with factors such as the carbon emissions of the IIES,as well as the lower load interruption *** price of selling energy can be dynamically adjusted to the lower LA in the mechanism,according to the information on carbon emissions and load interruption *** benefits and win-win situations are achieved between the upper and lower ***,CPLEX is used to iteratively solve the bilevel optimization *** optimal solution is selected according to the joint optimal discrimination *** results indicate that the sourceload coordinate operation can reduce the upper and lower operation *** the proposed pricingmechanism,the carbon emissions and load interruption power of IEO-LA are reduced by 9.78%and 70.19%,respectively,and the capture power of the carbon capture equipment is improved by 36.24%.The validity of the proposed model and method is verified.

关键词： Bilevel optimal scheduling load aggregator integrated energy operator carbon emission dynamic pricing mechanism

Recent progress in constructing fluorinated solid-electrolyte interphases for stable lithium metal anodes

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 270-291页

作者： Di Zhang Pengfei Lv Wei Qin xin he Yuanhua he Civil Aircraft Fire Science and Safety Engineering Key Laboratory of Sichuan Province College of Civil Aviation Safety EngineeringCivil Aviation Flight University of ChinaGuanghan 618307China School of Chemical Engineering Sichuan UniversityChengdu 610065China

Lithium metal batteries(LMBs)are emerging as a promising energy storage solution owing to their high energy density and specific ***,the non-uniform plating of lithium and the potential rupture of the solid-electrolyte interphase(SEI)during extended cycling use may result in dendrite growth,which can penetrate the separator and pose significant short-circuit *** a stable SEI is essential for the long-term operation of the ***-rich SEI has garnered significant attention for its ability to effectively passivate electrodes,regulate lithium deposition,and inhibit electrolyte *** the structural components and preparation methods of existing fluorinated SEI is crucial for optimizing lithium metal anode *** paper reviews the research on optimizing LiF passivation interfaces to protect lithium metal *** focuses on four types of compositions in fluorinated SEI that work synergistically to enhance SEI *** instance,combining compounds with LiF can further enhance the mechanical strength and ionic conductivity of the *** metals with LiF significantly improves electrochemical performance at the SEI/anode interface,with a necessary focus on reducing electron tunneling ***,incorporating polymers with LiF offers balanced improvements in interfacial toughness and ionic conductivity,though maintaining structural stability over long cycles remains a critical area for future *** alloys combined with LiF increase surface energy and lithium affinity,challenges such as dendrite growth and volume expansion *** summary,this paper emphasizes the crucial role of interfacial structures in LMBs and offers comprehensive guidance for future design and development efforts in battery technology.

关键词： LiF lithium metal anodes solid-electrolyte interphase interface cycling stability

Molecular dynamics study of primary radiation damage in TiVTa concentrated solid-solution alloy

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Chinese Physics B 2024年第3期33卷 530-535页

作者：赵永鹏豆艳坤贺新福曹晗王林枫邓辉球杨文 Reactor Engineering Technology Research Division China Institute of Atomic EnergyBeijing 102413China School of Physics and Electronics Hunan UniversityChangsha 410082China

The primary radiation damage in pure V and TiVTa concentrated solid-solution alloy(CSA)was studied using a molecular dynamics *** have performed displacement cascade simulations to explore the generation and evolution behavior of irradiation *** results demonstrate that the defect accumulation and agglomeration in TiVTa CSA are significantly suppressed compared to pure *** peak value of Frenkel pairs during cascade collisions in TiVTa CSA is much higher than that in pure V due to the lower formation energy of point ***,the longer lifetime of the thermal spike relaxation and slow energy dissipation capability of TiVTa CSA can facilitate the recombination of point *** defect agglomeration rate in TiVTa CSA is much lower due to the lower binding energy of interstitial clusters and reduced interstitial ***,the occurrence probability of dislocation loops in TiVTa CSA is lower than that in pure *** reduction in primary radiation damage may enhance the radiation resistance of TiVTa CSA,and the improved radiation tolerance is primarily attributed to the relaxation stage and long-term defect evolution rather than the ballistic *** results can provide fundamental insights into irradiation-induced defects evolution in refractory CSAs.

关键词： concentrated solid-solution alloy primary radiation damage molecular dynamics simulation

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可编程控制器在火电厂输灰系统中的应用

武汉水利电力大学学报 2000年第4期33卷 43-46页

作者：罗朝海付新河广州发电厂电力工程公司广东广州510160

介绍了火电厂输灰程控系统 ,对可编程控制器在该系统中的应用提出了自己的观点 ,并探讨了控制功能、方式等问题 .

关键词：可编程控制器主控柜火电厂输灰系统

对铁路警务组织体制与指挥机制改革的探讨——以铁路公安机关转制为视角

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政法学刊 2013年第2期30卷 17-22页

作者：付新河铁道警察学院警体部河南郑州450053

铁路公安机关的体制改革,与国家警察体制改革一起,是我国政治体制改革的一部分,无论是队伍建设,还是警务活动,铁路公安机关都发生了深刻的变化。当前铁路公安指挥系统和处置体系现状存在许多问题如警力严重不足与警务工作量刚性增加矛... 详细信息

铁路公安机关的体制改革,与国家警察体制改革一起,是我国政治体制改革的一部分,无论是队伍建设,还是警务活动,铁路公安机关都发生了深刻的变化。当前铁路公安指挥系统和处置体系现状存在许多问题如警力严重不足与警务工作量刚性增加矛盾凸现成为制约铁路公安发展的"瓶颈",应立足"警力无增长改善"思路,制定和完善预案体系、建立集约、高效的铁路警务作战指挥体系,提高指挥效能,培养高素质指挥人才。

关键词：铁路警察警务改革指挥机制

Molecular dynamics study of interactions between edge dislocation and irradiation-induced defects in Fe–10Ni–20Cr alloy

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Chinese Physics B 2023年第2期32卷 80-86页

作者：熊涛文陈小平林也平贺新福杨文胡望宇高飞邓辉球 College of Materials Science and Engineering Hunan UniversityChangsha 410082China School of Physics and Electronics Hunan UniversityChangsha 410082China China Institute of Atomic Energy Beijing 102413China Department of Nuclear Engineering and Radiological Sciences University of MichiganAnn Arbor MI48109USA

Irradiation-induced defects frequently impede the slip of dislocations, resulting in a sharp decline in the performance of nuclear reactor structural materials, particularly core structural materials. In the present work, molecular dynamics method is used to investigate the interactions between edge dislocations and three typical irradiation-induced defects(void,Frank loop, and stacking fault tetrahedron) with the sizes of 3 nm, 5 nm, and 7 nm at different temperatures in Fe–10Ni–20Cr alloy. The critical resolved shear stresses(CRSSs) are compared among different defect types after interacting with edge dislocations. The results show that the CRSS decreases with temperature increasing and defect size decreasing for each defect type during the interaction with edge dislocations, except for the case of 3-nm Frank loops at 900 K. According to a comparison, the CRSS in Frank loop is significantly higher than that of others of the same size, which is due to the occurrence of unfaulting and formation of superjog or stacking-fault complex during the interaction. The atomic evolution of irradiation-induced defects after interacting with dislocations can provide a novel insight into the design of new structural materials.

关键词： molecular dynamics simulation edge dislocation irradiation-induced defects austenitic stainless steel