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Evolution and Application of Sealing Ability of Gypsum Caprocks under Temperature-Pressure Coupling:An Example of the ZS5 Well in the Tazhong Area of the Tarim Basin

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Acta Geologica Sinica(English Edition) 2024年第1期98卷 168-184页

作者： LIU Hua ZHAO Shan YANG Xianzhang ZHU yongfeng WANG shen ZHANG Ke National Key Laboratory of Deep Oil and Gas China University of Petroleum(East China)QingdaoShandong 266580China School of Geosciences China University of Petroleum(East China)QingdaoShandong 266580China Laboratory for Marine Mineral Resources National Laboratory for Marine Science and TechnologyQingdaoShandong 266071China PetroChina Tarim Oil Field Company KorlaXinjiang 841001China

Gypsum caprocks'sealing ability is affected by temperature-pressure *** to the limitations of experimental conditions,there is still a lack of triaxial stress-strain experiments that simultaneously consider changes in temperature and pressure conditions,which limits the accuracy of the comprehensive evaluation of the brittle plastic evolution and sealing ability of gypsum rocks using temperature pressure *** stress-strain tests were utilized to investigate the differences in the evolution of the confinement capacity of gypsum rocks under coupled temperaturepressure action and isothermal-variable pressure action on the basis of sample feasibility *** to research,the gypsum rock's peak and residual strengths decrease under simultaneous increases in temperature and pressure over isothermal pressurization experimental conditions,and it becomes more *** reduces the amount of time it takes for the rock to transition from brittle to *** temperature is taken into account,both the brittle–plastic transformation's depth limit and the lithological transformation of gypsum rocks become shallower,and the evolution of gypsum rocks under variable temperature and pressure conditions is more complicated than that under isothermal *** sealing ability under the temperature-pressure coupling is more in line with the actual geological context when the application results of the Well#ZS5 are *** provides a theoretical basis for precisely determining the process of hydrocarbon accumulation and explains why the early hydrocarbon were not well preserved.

关键词： temperature-pressure coupling gypsum caprocks brittle-plastic evolution sealing capacity Tarim Basin

A high-strength,ductile Al-0.35Sc-0.2Zr alloy with good electrical conductivity strengthened by coherent nanosized-precipitates

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Journal of Materials Science & Technology 2017年第3期33卷 215-223页

作者： Renguo Guan yongfeng shen Zhanyong Zhao Xiang Wang School of Materials Science and Engineering Northeastern University State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou University of Technology

Ductility and electrical conductivity of metallic materials are inversely correlated with their strength,resulting in a difficulty of optimizing all three simultaneously. We design an Al-Sc-Zr-based alloy using semisolid extrusion to yield a good trade-off between strength and ductility along with excellent electrical conductivity. The Al-0.35Sc-0.2Zr wire with a diameter of 3 mm exhibited the best combined properties： a tensile strength of 210 ± 2 MPa, elongation of 7.6% ± 0.5%, and an electrical conductivity of 34.9 ± 0.05 MS/m. The average particle size of nanosized Al3（Sc, Zr） precipitates increased from 6.5 ± 0.5 nm to 25.0 ± 0.5 nm as the aging time increased from 1 h to 96 h at 380 °C, accompanied by the corresponding volume fraction variation from（6.2 ± 0.1） × 10^（-4） to（3.7 ± 0.1） × 10^（-3）. As proved by transmission electron microscopy observation, the high strength originates from the effective blockage of dislocation motion by numerous nanosized Al3（Sc, Zr） precipitates whilst both electrical conductivity and ductility remain at a high level due to the coherent precipitates possessing an extremely low electrical resistivity.

关键词： Al-0.35Sc-0.2Zr alloy Mechanical properties Electrical conductivity Nanosized precipitates

Synergy effect of multi-strengthening mechanisms in FeMnCoCrN HEA at cryogenic temperature

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Journal of Materials Science & Technology 2021年第27期86卷 158-170页

作者： Zhufeng He Nan Jia Hongwei Wang Haile Yan yongfeng shen Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Material Science and EngineeringNortheastern UniversityShenyang 110819China State Key Lab Rolling&Automat Northeastern UniversityShenyang 110819China

High-entropy alloys(HEAs)have attracted great research interest owing to their good combination of high strength and ductility at both room and cryogenic ***,expensive raw materials are always added to overcome the strength-ductility trade-off at low temperatures,leading to an increased production cost for the cryogenically used *** this work,a series of nitrogen-doped Fe Mn Co Cr HEAs have been processed by homogenization annealing,cold rolling and recrystallization annealing followed by water *** microstructural evolution and mechanical properties of the alloys are studied *** Fe_(49)Mn_(30)Co_(10)Cr_(10)N1alloy shows excellent mechanical properties at both 293 K and 77 ***,the yield and ultimate tensile strength of 1078 and 1630 MPa are achieved at the cryogenic temperature,respectively,while a satisfactory uniform elongation of 33.5%is *** ultrahigh yield strength results from the microstructure refinement caused by the activation of athermal martensitic transformation and mechanical twinning that occur in the elastic regime together with the increased lattice friction due to the cryogenic *** the plastic regime,the dynamic Hall-Petch effect caused by twinning,martensitic transformation,and reverse transformation together with the high barrier to dislocation motion jointly contribute to the ultrahigh tensile ***,the transformation induced plasticity(TRIP)and the twinning induced plasticity(TWIP)effects jointly contribute to the *** design strategy for attaining superior mechanical properties at low temperatures,*** adjusting stacking fault energy in the interstitial metastable HEAs,guides the development of high-performance and low-cost alloys for cryogenic applications.

关键词： High-entropy alloy Cryogenic deformation Nitrogen doping Phase transformation Twinning

Micromechanical behavior of a fine-grained China low activation martensitic(CLAM) steel

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Journal of Materials Science & Technology 2019年第9期35卷 1869-1876页

作者： Wenyin Xue Jinhua Zhou yongfeng shen Weina Zhang Zhenyu Liu The State Key Lab of Rolling & Automation Northeastern UniversityShenyang110819China Key Laboratory for Anisotropy and Texture of Materials (MOE) School of Materials Science and EngineeringNortheastern UniversityShenyang110819 China

Micromechanical behavior of a fine-grained China Low Activation Martensitic (CLAM) steel under nanoindentation was studied in this work. The grain size of the as-prepared ***-CLAM steel is ~5μm and the average diameter of the spherical precipitates is ~5 nm. Both elastic modulus and hardness decrease with increasing contact depth of the nanoindenter, following an exponential decreasing function. The abnormally large contact depths should be resulted from defect concentration under the indenter. The effect of nanosized precipitates on hardness is responsible for the pop-ins occurring in the load-depth curves, corresponding to the blockage of nanosized precipitates to the dislocation movement. Nanosized VC and M23C6precipitates with the volume fractions of 0.32% and 1.21% can be identified, respectively. Different strengthening mechanisms originated from the two types of nanosized precipitates. The blockage of dislocations by VC particles leads to an Orowan strengthening whilst dislocations could cut through theM23C6particles because of the large size of the particles. The strengthening effects originated from the VC and M23C6 precipitates lead to the strength increase of .448 MPa and .254 MPa, respectively.

关键词： China-low-activation-martensite (CLAM) steel Nanoscale precipitates Strengthening Nanoindentation

Oxygen vacancy promoting artificial atom(RuPd)by d-orbital coupling for efficient water dissociation

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Nano Research 2024年第8期17卷 7045-7052页

作者： Ruofan shen Yanyan Liu Shuling Liu Shuyan Guan Huanhuan Zhang Sehrish Mehdi Saima Ashraf Ting-Hui Xiao Erjun Liang Jianchun Jiang yongfeng Wang Baojun Li Laboratory of Zhongyuan Light School of PhysicsZhengzhou UniversityZhengzhou 450001China Key Laboratory of Materials Physics Ministry of EducationSchool of PhysicsZhengzhou UniversityZhengzhou 450001China College of Chemistry Zhengzhou UniversityZhengzhou 450001China College of Science Henan Agricultural UniversityZhengzhou 450002China Department of Chemistry Tsinghua UniversityBeijing 100084China National Engineering Lab.for Biomass Chemical Utilization Institute of Chemical Industry of Forest ProductsCAFNanjing 210042China Center for Carbon-based Electronics and Key Laboratory for the Physics and Chemistry of Nanodevices Department of ElectronicsPeking UniversityBeijing 100871China

Rational design of highly active catalysts for breaking hydrogen-oxygen bonds is of great significance in energy chemical reactions involving ***,an efficient strategy for the artificial atom(RuPd)established by d-orbital coupling and adjusted by oxygen vacancy(VO)is verified for water *** an experimental verification,the turnover frequency of RuPd-TiO_(2)-VO(RuPdTVO)catalyst in ammonia borane hydrolysis reaches up to 2750 min^(−1)(26,190 min−1 based on metal dispersion)in the absence of alkali,exceeding the highest active catalysts(Rh-based catalysts).The d-orbital coupling effect between Ru and Pd simulates the outer electronic structure of *** transfer from VO to(RuPd)constructs an electron-rich state of active sites that further enhances the ability of the artificial atom to dissociate *** work provides an effective electronic regulation strategy from VO and artificial atom constructed by d-orbital coupling effect for efficient water dissociation.

关键词： ammonia borane hydrolysis d-orbital coupling oxygen vacancy artificial atom water dissociation

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D6A钢在轧制过程中的强韧化机理

材料工程 2022年第4期50卷 172-180页

作者：张小丽冯晓伟申勇峰东北大学材料各向异性与织构教育部重点实验室沈阳110819 中国工程物理研究院总体工程研究所四川绵阳621999

通过轧制-热处理工艺能够使D6A钢的强度显著提高。为了探究其强韧化机理,本实验采用热轧及两相区温轧退火工艺,获得微米级D6A合金钢样品,微观组织为铁素体基体及粒状渗碳体。通过室温拉伸实验、SEM、X射线衍射、EBSD等手段对实验钢的显... 详细信息

通过轧制-热处理工艺能够使D6A钢的强度显著提高。为了探究其强韧化机理,本实验采用热轧及两相区温轧退火工艺,获得微米级D6A合金钢样品,微观组织为铁素体基体及粒状渗碳体。通过室温拉伸实验、SEM、X射线衍射、EBSD等手段对实验钢的显微组织和力学性能进行表征,结果表明:随着变形量的增加,晶粒尺寸由4.5μm细化为1.5μm,渗碳体的含量逐渐增加,小角度晶界的比例升高,屈服强度和抗拉强度不断增加,伸长率略有降低,说明轧制过程使亚晶粒的尺寸不断降低,晶界面积增加,位错滑移受到的阻力增大。同时,本研究对不同轧制变形量实验钢的位错密度进行计算,当轧制变形量为88%时,位错密度最高,此时加工硬化的程度最高。随着变形量的增加,第二相强化和晶粒细化引起的强度增量呈不断上升的趋势,位错强化引起的强度增量先升高后降低,D6A钢的主要强化方式为第二相强化、细晶强化及位错强化。

关键词： D6A钢第二相强化细晶强化位错密度 WH方法位错强化

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电解液类型对双离子电池阴阳离子储存行为的影响

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化工学报 2023年第7期74卷 3116-3126页

作者：张蒙蒙颜冬沈永峰李文翠大连理工大学化工学院辽宁大连116024

双离子电池是一种阴阳离子同时参与能量储存过程的新型电池,具有工作电压高、成本低、环境友好等优点。但正极高电压特性会引起电解液氧化分解。通过调节电解液浓度和溶剂组成系统地考察了电解液类型对PF-6嵌入行为的影响规律以及溶剂... 详细信息

双离子电池是一种阴阳离子同时参与能量储存过程的新型电池,具有工作电压高、成本低、环境友好等优点。但正极高电压特性会引起电解液氧化分解。通过调节电解液浓度和溶剂组成系统地考察了电解液类型对PF-6嵌入行为的影响规律以及溶剂组成与负极稳定性之间的相容性关系。链状碳酸甲乙酯(EMC)溶剂促进PF-6在正极的嵌入过程,环状碳酸乙烯酯(EC)溶剂有利于负极稳定性。具有链状EMC和环状EC混合溶剂的1 mol·L^(-1)LiPF6-EC/EMC(3∶7,体积比)电解液更适用于双离子电池,以此作为电解液组装的石墨//软炭-双离子电池在580 W·kg^(-1)的功率密度下可提供98 W·h·kg^(-1)的能量密度,且在1 A·g-1电流密度下经1000圈循环后容量保持率为86.9%。

关键词：电化学反应动力学双离子电池电解质阴离子嵌入碳酸甲乙酯碳酸乙烯酯

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基于LPC54606的智能小车控制系统

实验室研究与探索 2023年第6期42卷 106-111页

作者：杨钊灿沈永峰陈飞洋上海电机学院机械学院上海201306

选用LPC54606J512BD100作为主控芯片,设计智能小车的控制系统。硬件部分采用3轮车模、PCB和传感器外设。PCB包括单片机核心板、主控板和电动机驱动板。主控板由电源稳压、运放、视觉感知、直立、远程通信和超声波等模块组成。单片机核... 详细信息

选用LPC54606J512BD100作为主控芯片,设计智能小车的控制系统。硬件部分采用3轮车模、PCB和传感器外设。PCB包括单片机核心板、主控板和电动机驱动板。主控板由电源稳压、运放、视觉感知、直立、远程通信和超声波等模块组成。单片机核心板包含LPC54606J512BD100芯片为主的相关电路。电动机驱动板电路主要由MC34063(DC-DC电源芯片)、SN74LV 245A逻辑芯片和H桥电路组成。软件程序使用卡尔曼滤波算法和PID算法。智能小车控制系统可实现姿态转换、直立、避障、环岛处理和路径规划任务等。

关键词：智能小车路径规划 PID算法卡尔曼滤波算法

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超细晶D6A钢动态拉伸力学特性实验研究

爆炸与冲击 2022年第4期42卷 90-98页

作者：杨泽洲申勇峰冯晓伟薛文颖谢若泽胡艳辉中国工程物理研究院总体工程研究所四川绵阳621999 东北大学材料各向异性与织构教育部重点实验室辽宁沈阳110819 东北大学轧制技术与连轧自动化国家重点实验室辽宁沈阳110819

为了推进超细晶D6A钢在半穿甲战斗部壳体上的应用,研究了动态加载下其宏观力学行为和细观变形机理。运用旋转盘式Hopkinson拉杆技术,开展了超细晶D6A低合金钢(平均晶粒尺寸为510 nm)的动态拉伸实验,获得了不同应变率(500~1000 s^(−1))... 详细信息

为了推进超细晶D6A钢在半穿甲战斗部壳体上的应用,研究了动态加载下其宏观力学行为和细观变形机理。运用旋转盘式Hopkinson拉杆技术,开展了超细晶D6A低合金钢(平均晶粒尺寸为510 nm)的动态拉伸实验,获得了不同应变率(500~1000 s^(−1))下超细晶钢的应力-应变曲线。运用TEM观测微观形貌,从细观层次研究了高应变率拉伸作用下超细晶钢的动态力学特性。结果表明,超细晶D6A钢具有较高的动态拉伸强度和良好的延展性。并且,晶粒细化和纳米析出相(渗碳体)是超细晶钢同时拥有高强度和较好韧性的重要因素;在动态拉伸过程中析出的大量纳米级渗碳体,与高密度晶界共同作用限制了位错运动,从而产生额外的塑性变形抗力,有效提升了超细晶钢的强度;在塑性变形阶段超细晶钢出现的明显应力下降现象,是可动位错密度增高的结果。

关键词：超细晶D6A钢动态拉伸实验动态强韧化应力下降

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