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Journal of Semiconductors 2016年第11期37卷 11-17页

作者：王升康云李贤丽 College of Electronic science Northeastern Petroleum University science and technology innovation team in heilongjiang province "fault deformation Sealing and Fluid Migration"

Within the quasi-one-dimensional effective potential model and effective mass approximation,we obtain the wavefunctions and energy eigenvalues of the ground（j=1） and first 2 excited states（j=2 and 3） of a donor impurity in a rectangular GaAs quantum dot in the presence of electric *** donor impurity-related linear and nonlinear optical absorption as well as refractive index changes for the transitions j=1-2 and j =2-3 are *** results show that the impurity position,incident optical intensity and electric field play important roles in the optical absorption coefficients and refractive index *** find that the impurity effect induces the blueshift for j=1-2 and redshift for j=3-2 in the absence of the electric field,but it leads to redshift for j = 1-2 and blueshift for j = 3-2 in the existence of the ***,the optical coefficient for the higher energy transitions j =2-3 is insensitive to variation of impurity positions,while that for the low energy transition j =1-2 depends significantly on the positions of *** addition,the saturation and splitting phenomenon of the optical absorption are observed as the incident optical intensity increases.

关键词： quasi-one-dimensional effective potential rectangular GaAs quantum dot optical absorption refrac-tive index changes

Effects of carbon content on the microstructure and tensile properties of a low-density steel

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 391-401页

作者： Yongxuan Shang Mingyu Fan Shuyong Jiang Zhongwu Zhang Key Laboratory of Superlight Materials and Surface technology Ministry of EducationCollege of Materials Science and Chemical EngineeringHarbin Engineering UniversityHarbin 150001China State Key Laboratory of Metal Material for Marine Equipment and Application Iron&Steel Research Institute of Ansteel Group CorporationAnshan 114009China

Carbon can change the phase components of low-density steels and influence the mechanical *** this study,a new method to control the carbon content and avoid the formation ofδ-ferrite by decarburization treatment was *** microstructural changes and mechanical characteristics with carbon content induced by decarburization were systematically ***-Jaoul(C-J)analysis was employed to examine the work hardening characteristics during the tensile *** decarburization by heat treatments,the carbon content within the austenite phase decreased,while Mn and Al were almost unchanged;this made the steel with full austenite transform into the austenite and ferrite dual ***,(Ti,V)C carbides existed in both matrix phase and the mole fraction almost the *** addition,the formation of other carbides *** loss induced a decrease in strength due to the weakening of the carbon solid *** the steel with the single austinite,the deformation mode of austenite was the dislocation planar glide,resulting in the formation of *** the dual-phase steel,the deformation occurred by the dislocation planar glide of austenite first,with the increase in strain,the cross slip of ferrite took place,forming dislocation cells in *** the late stage of deformation,the work hardening of austinite increased rapidly,while that of ferrite increased slightly.

关键词： low-density steels carbon content decarburization strengthening mechanisms work hardening behavior

deformation Mechanism and Vertical Sealing Capacity of fault in the Mudstone Caprock

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Journal of Earth science 2019年第2期30卷 367-375页

作者： Xiaofei Fu Lingyu Yan Lingdong Meng Xiaobo Liu Laboratory of CNPC fault-Controlling Reservoir Northeast Petroleum University science and technology innovation team in heilongjiang province"fault deformation Sealing and Fluid Migration"Northeast Petroleum University State Key Laboratory Base of Unconventional Oil and Gas Accumulation and Exploitation Northeast Petroleum University School of Energy Resource China University of Geosciences Daqing Yushulin Oilfield Development Co.Ltd.

The petrophysical property of mudstone often transforms from ductile to brittle in the process of burial-uplift. The deformation mechanism of fault in brittle and ductile mudstone caprock is different, which leads to the formation of different types of fault zone structure. Different methods are required to evaluate the sealing mechanism of those fault zones. Based on the caprock deformation mechanism, fault sealing mechanism, quantitative evaluation method of vertical fault sealing capacity is put forward in this study. Clay smear is formed in the process of plastic deformation and its continuity controls the sealing capacity of fault. The outcrop and oil field data have confirmed that when sealing parameter SSF is less than 4–7, the clay smear becomes discontinuous and then oil and gas go through the caprock and migrate vertically. Quantities of fractures are formed in mudstone in the process of brittle deformation. The fracture density increases with the increase of the fault displacement. When the fractures are connected, oil and gas go through the caprock and migrate vertically. The connectivity of fault depends on the displacement and the thickness of caprock. On the basis of the above, a method is put forward to quantify the connectivity of fault with the juxtaposition thickness of caprock after faulting. The research on the juxtaposition thickness of caprock after faulting of the member II of Dongying Formation in Nanpu depression and the distribution of oil and gas indicates when the juxtaposition thickness of caprock is less than 96.2 m, the fault becomes leaking vertically. In the lifting stage, with the releasing and unloading of the stress, the caprock becomes brittle generally and then forms through going fault which will lead to a large quantity of oil and gas migrate vertically.

关键词： mudstone fault deformation brittle-ductile shale smear CJT quantitative evaluation

Characteristics of fault zones and their control on remaining oil distribution at the fault edge: a case study from the northern Xingshugang Anticline in the Daqing Oilfield, China

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Petroleum science 2016年第3期13卷 418-433页

作者： Xiao-Fei Fu Xiao Lan Ling-Dong Meng Hai-Xue Wang Zong-Bao Liu Zhi-Qiang Guo Zai-He Chen Laboratory of CNPC fault Controlling Reservoir Northeast Petroleum University science and technology innovation team in heilongjiang province ‘‘fault deformation Sealing and Fluid Migration’’ The State Key Laboratory Base of Unconventional Oil and Gas Accumulation and Exploitation Earth Science CollegeNortheast Petroleum University Earth science College Northeast Petroleum University NO.5 Production Plant Huabei Oilfield Co.PetroChina

Most major oil zones in the Daqing Oilfield have reached a later,high water cut stage,but oil recovery is still only approximately 35%,and 50%of reserves remain to be *** remaining oil is primarily distributed at the edge of faults,in poor sand bodies,and in insufficiently injected and produced ***,the edge of faults is a major target for remaining oil enrichment and potential *** on the dynamic change of production from development wells determined by the injection-recovery relationship at the edge of faults,we analyzed the control of structural features of faults on remaining oil enrichment at the *** results show that the macroscopic structural features and their geometric relationship with sand bodies controlled remaining oil enrichment zones like the edges of NNE-striking faults,the footwalls of antithetic faults,the hard linkage segments（two faults had linked together with each other to form a bigger through-going fault）,the tips of faults,and the oblique anticlines of soft *** edges formed two types of forward microamplitude structures：（1） the tilted uplift of footwalls controlled by inverse fault sections and（2） the hanging-wall horizontal anticlines controlled by synthetic fault *** remaining oil distribution was controlled by microamplitude ***,such zones as the tilted uplift of the footwall of the NNW-striking antithetic faults with a fault throw larger than 40 m,the hard linkage segments,the tips of faults,and the oblique anticlines of soft linkage were favorable for tapping the remaining oil ***-target directional drilling was used for remaining oil development at fault *** fault spacing was determined on the basis of fault combinations and width of the shattered *** core and log data revealed that the width of the shattered zone on the side of the fault core was less than 15 m in general;therefore,the distance from a fault to the development target

关键词： fault edge fault zone structure Segmentation growth Micro-amplitude structure Sealing Safety distance

Study on seepage and deformation characteristics of coal microstructure by 3D reconstruction of CT images at high temperatures

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International Journal of Mining science and technology 2021年第2期31卷 175-185页

作者： Gang Wang Xiangjie Qin Dongyang Han Zhiyuan Liu State Key Laboratory of Mining Disaster Prevention and Control Co-found by Shandong province and the Ministry Of science and technology Shandong University of Science and TechnologyQingdao 266590China College of Safety and Environmental Engineering Shandong University of Science and TechnologyQingdao 266590China

To study the seepage and deformation characteristics of coal at high temperatures,coal samples from six different regions were selected and subjected to computed tomography(CT)scanning *** conjunction with ANSYS software,3 D reconstruction of CT images was used for the establishment of fluidsolid conjugate heat transfer model and coal thermal deformation model based on the microstructures of *** addition,the structure of coal was studied in 2 D and 3 D perspectives,followed by the analysis of seepage and deformation characteristics of coal at high *** results of this study indicated that porosity positively correlated with the fractal dimension,and the connectivity and seepage performances were roughly identical from 2 D and 3 D *** the porosity increased,the fractal dimension of coal samples became larger and the pore-fracture structures became more *** a result,the permeability of coal samples *** the meantime,fluid was fully heated,generating high-temperature water at ***,when the porosity was low,the outlet temperature was very *** average deformation of coal skeleton with different pore-fracture structures at high temperatures showed a trend of initial increase and subsequent decrease with the increase of porosity and fractal *** maximum deformation of coal skeleton positively correlated with connectivity but negatively correlated with the fractal dimension.

关键词： Coal Pore-fracture structures Fluid-solid conjugate heat transfer Thermal deformation

Effect of time interval on microstructure evolution of medium carbon steel during warm deformation

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Journal of Iron and Steel Research International 2019年第6期26卷 602-610页

作者： Hong-bin Li Xiao-ping Zheng De-cheng Wan Lian-sheng Chen College of Metallurgy and Energy North China University of Science and Technology Tangshan 063009 Hebei China Modem Metallurgy of Hebei province Key Laboratory Tangshan 063009 Hebei China

The thermal mechanical simulator system (Gleeble-3500) was used to carry out the double passes compression tests. The microstructure evolution of medium carbon steel with different time intervals during warm deformation was investigated by scanning electron microscopy, transmission electron microscopy and electron back-scattered diffraction. The results show that the effects of time interval on microstructure evolution are very important. The low-angle boundaries transform into high-angle boundaries (HABs) during interval. The fraction of HABs and homogeneity of particle carbides increase with increasing time interval. In addition, the homogeneity of carbides also increases with the strain. However, the effects of time interval on the microstructure evolution are negligible when it exceeds 100 s.

关键词： Double-pass deformation Warm deformation Microstructure evolution Misorientation

Breaking process and mining stress evolution characteristics of a high-position hard and thick stratum

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International Journal of Mining science and technology 2016年第4期26卷 563-569页

作者： Wang Pu Jiang Jinquan Zhang Peipeng Wu Quanlin State Key Laboratory of Mining Disaster Prevention and Control Co-Founded by Shandong province and the Ministry of science and technology Shandong University of Science and Technology

Based on the boundary support conditions of overlying high-position,hard and thick strata,a Winkler foundation beam mechanical model was *** expressions for the characteristics and position of the bending moment for high-position,hard and thick strata were constructed by theoretical analysis,and the initial breaking position of high-position,hard and thick strata was also *** breaking process and evolution law of mining stress in high-position,hard and thick strata were studied by similar material simulation *** show that:due to the foundation deformation effect of the lower strata,the initial break position in high-position,hard thick layers is in the middle of goaf;vertical tension fractures first occur under the middle surface,then tilt tension fractures form at both sides and a non-uniform thickness of the fracture structure forms and produces subsidence deformation;behind the coal wall tilt fractures extend and eventually complete the *** stress produces obvious changes before and after the breakage of the high,hard and thick stratum;high stress concentration forms in front of the coal wall before breakage and fracture stress concentration significantly reduces after *** seam mining under high-position,hard thick strata can easily induce dynamic phenomena.

关键词： High-position hard and thick strata Elastic foundationInitial breaking Breaking process Mining-induced stress

Mechanical Properties and Fracture Behavior of Cu-Co-Be Alloy after Plastic deformation and Heat Treatment

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Journal of Iron and Steel Research International 2016年第9期23卷 933-939页

作者： Yan-jun ZHOU Ke-xing SONG Jian-dong XING Zhou LI Xiu-hua GUO State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and EngineeringXi'an Jiaotong University School of Materials science and Engineering Henan University of Science and Technology Collaborative innovation Center of Nonferrous Metals Henan University of Science and Technology School of Materials science and Engineering Central South University

Mechanical properties and fracture behavior of Cu-0.84Co 0.23Be alloy after plastic deformation and heat treatment were comparatively investigated. Severe plastic deformation by hot extrusion and cold drawing was adopted to induce large plastic strain of Cu 0.84Co-0.23Be alloy. The tensile strength and elongation are up to 476.6 MPa and 18%, respectively. The fractured surface consists of deep dimples and micro voids. Due to the formation of su- persaturated solid solution on the Cu matrix by solution treatment at 950℃ for 1 h, the tensile strength decreased to 271.9 MPa, while the elongation increased to 42%. The fracture morphology is parabolic dimple. Furthermore, the tensile strength increased significantly to 580.2 MPa after aging at 480 ℃ for 4 h. During the aging process, a large number of precipitates formed and distributed on the Cu matrix. The fracture feature of aged specimens with low elongation （4.6%） exhibits an obvious brittle intergranular fracture. It is confirmed that the mechanical properties and fracture behavior are dominated by the microstrueture characteristics of Cu-0.84Co 0.23Be alloy after plastic de- formation and heat treatment. In addition, the fracture behavior at 450 ℃ of aged Cu-0.84Co 0.23Be alloy was also studied. The tensile strength and elongation are 383.6 MPa and 11.2%, respectively. The fractured morphologies are mainly candy-shaped with partial parabolic dimples and equiaxed dimples. The fracture mode is multi mixed mechanism that brittle intergranular fracture plays a dominant role and ductile fracture is secondary.

关键词： Cu-Co-Be alloy heat treatment mechanical property fracture behavior plastic deformation

Designing ultrastrong and thermally stable FeCrAl alloys with the fine-grained structure

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Journal of Materials science & technology 2024年第4期171卷 198-208页

作者： Shuaiyang Liu Jinyu Zhang Hui Wang Gang Liu Xiangdong Ding Jun Sun State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an 710049China science and technology on Reactor Fuel and Materials Laboratory Nuclear Power Institute of ChinaChengdu 610041China

Designing microstructurally stable FeCrAl alloys with excellent strength-ductility synergy is highly desir-able for their engineering ***,due to the preference nucleation of precipitates at grain boundaries(GBs),the improved precipitation strengthening of these alloys is usually accompanied by in-tergranular ***,we propose a novel thermomechanical processing route coupled with the Si alloying strategy via precipitation of coherent deformable Laves precipitates inside equiaxed fine-grains to achieve FeCrAl alloys with ultrahigh yield strength over∼992 MPa,excellent uniform elongation of∼7.6%at room temperature,and superior thermal stability at temperature∼1200℃.The Si alloying not only decreases the stacking fault energy of Laves precipitates favorable for their stacking-fault-mediated deformation but also hinders grain coarsening at 1200℃due to the Si-enrichment favorable for GB pin-ning *** results prove the possibility of achieving the collaborative enhancement of mutually exclusive properties in alloys,such as strength-ductility-thermal stability via nanoprecipitation engineer-ing,and offer a promising route to prepare dispersion-strengthened materials.

关键词： FeCrAl alloys Si alloying Mechanical properties Thermal stability Laves phase

Seismites in the Dasheng Group： New evidence of strong tectonic and earthquake activities of the Tanlu fault Zone

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science China Earth sciences 2016年第3期59卷 601-618页

作者： TIAN Hong Shui Antonius Johannes VAN LOON WANG Hua Lin ZHANG Shen He ZHU Jie Wang School of Civil Engineering Shandong Jianzhu University Jinan 250101 China Geological Institute Adam Mickiewicz University Mak6w Polnych 16 61-606 Poznan Poland Earthquake Engineering Research Center of Shandong province Jinan 250014 China

More than 80 layers of seismites were recognized from the Early Cretaceous Dasheng Group in the Mazhan and Tancheng graben basins in the Tanlu fault Zone, eastern China. The responsible seismic events took place about 110–100 Ma in the Early Cretaceous. The fault zone was affected at the time by strong tectonics, due to tension-related stretching and scattered squeezing by strike-slip faults. These tectonic activities induced a series of strong earthquakes with Richter magnitudes(M) of 5–8.5. The earthquakes affected saturated or semi-consolidated flood and lake sediments, and produced intra-layer deformations by several processes, including liquefaction, thixotropy, drop, faulting, cracking, filling and folding, which resulted in the formation of various soft-sediment deformation structures, such as dikes and veins of liquefied sand, liquefied breccias, liquefied homogeneous layers, load structures, flame structures, ball-and-pillow structures, boudinage, diapirs, fissure infillings, a giant conglomerate wedge, and syn-sedimentary faults. The seismites are new evidence of tectonic and seismic activities in the Tanlu fault Zone during the Early Cretaceous; the series of strong seismic events that can be deduced from them must be considered as a response to the destruction of the North China Craton.

关键词： Seismites Dasheng Group Early Cretaceous Seismic event Tanlu fault Zone Craton destruction