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Properties of a reaction-bonded β-SiAlON ceramic doped with an FeMo alloy for application to molten aluminum environments

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International Journal of Minerals,Metallurgy and Materials 2015年第5期22卷 530-536页

作者： Yan-jun Li hai-liang yu hai-yun Jin Zhong-qi Shi Guan-jun Qiao Zhi-hao Jin State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiaotong University School of Materials Science and Engineering Jiangsu University

An FeMo-alloy-doped β-SiA1ON （FeMo/β-SiA1ON） composite was fabricated via a reaction-bonding method using raw materials of Si, Al2O3, A1N, FeMo, and Sm2O3. The effects of FeMo on the microstructure and mechanical properties of the composite were investi- gated. Some properties of the composite, including its bending strength at 700℃ and after oxidization at 700℃ for 24 h in air, thermal shock resistance and corrosion resistance to molten aluminum, were also evaluated. The results show that the density, toughness, bending strength, and thermal shock resistance of the composite are obviously improved with the addition of an FeMo alloy. In addition, other properties of the composite such as its high-temperature strength and oxidized strength are also improved by the addition of FeMo alloy, and its corrosion re- sistance to molten aluminum is maintained. These findings indicate that the developed FeMo/β-SiA1ON composite exhibits strong potential for application to molten aluminum environments.

关键词： composite materials SiAION ceramics iron molybdenum alloys reaction bonding mechanical properties molten aluminum

Image processing based three-dimensional model reconstruction for cross-platform numerical simulation

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China Foundry 2023年第2期20卷 139-147页

作者： yu-cheng Sun yu-hang Huang Na Li Xiao Han Ai-long Jiang Jin-wu Kang Ji-wu Wang hai-liang yu State Key Laboratory of Engine Reliability Weichai Power Co.Ltd.Weifang 261061ShandongChina School of Mechanical Engineering Central South UniversityChangsha 41000China School of Mechanical Electronic and Control EngineeringBeijing Jiaotong UniversityBeijing 100044China Key Laboratory for Advanced Materials Processing Technology School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

Numerical simulation is the most powerful computational and analysis tool for a large variety of engineering and physical *** a complex problem relating to multi-field,multi-process and multi-scale,different computing tools have to be developed so as to solve particular fields at different scales and for different ***,the integration of different types of software is ***,it is difficult to perform the transfer of the meshes and simulated results among software packages because of the lack of shared data formats or encrypted data *** image processing based method for three-dimensional model reconstruction for numerical simulation was proposed,which presents a solution to the integration problem by a series of slice or projection images obtained by the post-processing modules of the numerical simulation *** means of mapping image pixels to meshes of either finite difference or finite element models,the geometry contour can be extracted to export the stereolithography *** values of results,represented by color,can be deduced and assigned to the *** the models with data can be directly or indirectly integrated into other software as a continued or new numerical *** three-dimensional reconstruction method has been validated in numerical simulation of castings and case studies were provided in this study.

关键词： cross-platform numerical simulation 3D model reconstruction image processing slice

Numerical Simulation of Temperature Field and Thermal Stress Field of Work Roll During Hot Strip Rolling

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Journal of Iron and Steel Research International 2007年第5期14卷 18-21页

作者： LI Chang-sheng yu hai-liang DENG Guan-yu LIU Xiang-hua WANG Guo-dong State Key Laboratory of Rolling and Automation Northeastern University Shenyang 110004 Liaoning China

Based on the thermal conduction equations, the three-dimensional （3D） temperature field of a work roll was investigated using finite element method （FEM）. The variations in the surface temperature of the work roll during hot strip rolling were described, and the thermal stress field of the work roll was also analyzed. The results showed that the highest roll surface temperature is 593 ℃, and the difference between the minimum and maximum values of thermal stress of the work roll surface is 145.7 MPa. Furthermore, the results of this analysis indicate that temperature and thermal stress are useful parameters for the investigation of roll thermal fatigue and also for improving the quality of strip during rolling.

关键词： hot strip mill roll temperature field thermal stress finite element method

Isogeometric Analysis for the Arbitrary AFG Microbeam with Two-Phase Nonlocal Stress-Driven Model

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Acta Mechanica Solida Sinica 2024年第2期37卷 341-360页

作者： Pei-liang Bian Zhaowei Liu hai Qing Tiantang yu Department of Engineering Mechanics Hohai UniversityNanjing211100China State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and AstronauticsNanjing210016China

Scale effects play critical roles in the mechanical responses of *** isogeometric analysis was developed here to investigate the mechanical responses of an axially functionally graded *** Euler–Bernoulli beam model was utilized,and size effects in the structure were modeled with a stress-driven two-phase local/nonlocal integral *** governing equation of microstructures was given in an equivalent differential form with two additional constitutive boundary *** framework was verified and utilized to analyze the microbeam’s static and dynamic mechanical *** present work showed great potential for modeling various types of functionally graded microstructures.

关键词： Isogeometric analysis Size effect Functionally graded material Nonlocal theory Euler-Bernoulli beam

Construction and Expression of Human Survivin and Preparation of Its Polyclonal Antibody

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Chemical Research in Chinese Universities 2008年第6期24卷 767-770页

作者： ZHANG hai-hong ZHANG Xi-zhen ZHAO Dong-hai SHI He-liang yu Yong-hui WU Yong-ge yu Xiang-hui KONG Wei Vaccine Research Center College of Life Science Jilin University Changchun 130012 P R. China

Survivin, a novel member of inhibitor of apoptosis（IAP） protein family, is aberrantly expressed in cancer but undetectable in normal, differentiated adult tissues. The cancer-specific expression of survivin, coupled with its importance in inhibiting cell death and in regulating cell division makes it a useful diagnostic marker of cancer and a potential target for cancer treatment. Survivin cDNA amplified from the total RNA of 293 cells through RT-PCR was cloned into prokaryotic expression vector pRSET-B. The recombinant plasmid pRSET-B-Surv was expressed in *** BL21, and the relative molecule mass（Mr） of expressed fusion protein was approximately 21000. The recombinant protein was purified through Ni^2＋ affinity chromatography column and characterized by SDS-PAGE and Western blot. The purified recombinant protein was then injected into rabbits, and antisurvivin polyclonal antibody with a high titer was obtained.

关键词： Clone Survivin Expression Polyclonal antibody

Preparation of high-mechanical-property medium-entropy CrCoNi alloy by asymmetric cryorolling

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Transactions of Nonferrous Metals Society of China 2022年第5期32卷 1559-1574页

作者： yu-ze WU Zhao-yang ZHANG Juan LIU Charlie KONG yu WANG Puneet TANDON Alexander PESIN hai-liang yu State Key Laboratory of High Performance Complex Manufacturing Central South UniversityChangsha 410083China College of Mechanical and Electrical Engineering Central South UniversityChangsha 410083China Light Alloys Research Institute Central South UniversityChangsha 410083China Mark Wainwright Analytical Centre University of New South WalesSydneyNSW 2052Australia PDPM Indian Institute of Information Technology Design and ManufacturingJabalpur 482005India Laboratory of Mechanics of Gradient Nanomaterials Nosov Magnitogorsk State Technical UniversityMagnitogorsk 455000Russia

In order to obtain good strength−plasticity synergy for a medium entropy alloy(MEA)CrCoNi,cold rolling,asymmetric rolling,cryorolling and asymmetric-cryorolling with subsequent annealing at different temperatures were *** results showed that the asymmetric-cryorolled alloy achieved a high strength of over 1.6 *** annealing at 1073 K,it retained a high strength of~1 GPa while the elongation reached nearly 60%.After annealing,the heterogeneous characteristics were formed in asymmetric-cryorolled samples,which were found to be more distinct than those of the samples subjected to asymmetric *** resulted in the generation of high strength and ductility.

关键词： medium entropy alloy heterogeneous structure annealing mechanical properties asymmetric cryorolling

Fabrication of ultrafine-grained AA1060 sheets via accumulative roll bonding with subsequent cryorolling

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Transactions of Nonferrous Metals Society of China 2021年第11期31卷 3370-3379页

作者： Qing-lin DU Chang LI Xiao-hui CUI Charlie KONG hai-liang yu State Key Laboratory of High Performance Complex Manufacturing College of Mechanical and Electrical EngineeringCentral South UniversityChangsha 410083China Light Alloys Research Institute Central South UniversityChangsha 410083China College of Mechanical Engineering Hunan Institute of Science and TechnologyYueyang 414000China Mark Wainwright Analytical Centre University of New South WalesSydneyNSW 2052Australia

Ultrafine-grained(UFG)AA1060 sheets were fabricated via five-cycle accumulative roll bonding(ARB)and subsequent three-pass cold rolling(298 K),or cryorolling(83 K and 173 K).Microstructures of the aluminum samples were examined via transmission electron microscopy,and their mechanical properties were measured via tensile and microhardness *** indicate that ultrafine grains in ARB-processed sheets were further refined by subsequent rolling,and the grain size became finer with reducing rolling *** mean grain size of 666 nm in the sheets subjected to ARB was refined to 346 or 266 nm,respectively,via subsequent cold rolling or cryorolling(83 K).Subsequent cryorolling resulted in ultrafine-grained sheets of higher strength and ductility than those of the sheets subjected to cold rolling.

关键词： microstructure AA1060 sheet ultrafine-grained materials cryorolling accumulative roll bonding

Feasibility and clinical benefits of the double-ProGlide technique for hemostasis after cryoballoon atrial fibrillation ablation with uninterrupted oral anticoagulants

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Journal of Geriatric Cardiology 2023年第4期20卷 268-275页

作者： Jia-Yin SUN Chang-Bo XUAN hai-liang yu hai-Yang WANG Hong-Ya HAN Zhi-Ming ZHOU De-An JIA Dong-Mei SHI yu-Jie ZHOU Shi-Wei YANG Department of Cardiology Beijing Anzhen HospitalCapital Medical UniversityBeijing Institute of Heart Lung and Blood Vessel Diseasethe Key Laboratory of Remodeling-Related Cardiovascular DiseaseMinistry of EducationBeijingChina Department of Cardiology Dongzhimen HospitalBeijing University of Chinese MedicineBeijingChina Department of Cardiology Tangshan Fengrun District Second People’s HospitalHebeiChina Department of Cardiology Qingdao Municipal HospitalQingdaoChina

OBJECTIVE To access the efficacy and safety of the double-ProGlide technique for the femoral vein access-site closure in cryoballoon ablation with uninterrupted oral anticoagulants(OAC),and its impact on the electrophysiology laboratory time as well as hospital stay after the procedure in this observational *** Patients with atrial fibrillation undergoing cryoballoon ablation with uninterrupted OAC at Department of Cardiology,Beijing Anzhen Hospital,Capital Medical University,Beijing,China from May 2019 to May 2021 were enrolled in this *** October 2020,double-ProGlide technique was consistently used for hemostasis(ProGlide group),and before that conventional manual compression was utilized(manual compression group).The occurrence of vascular and groin complications was accessed during the hospital stay and until the three-month *** A total of 140 participants(69.30%of male,mean age:59.21±10.29 years)were evaluated,70 participants being in each *** hemostasis was achieved in all the patients with ProGlide *** major vascular complications were found in the ProGlide group while two major vascular complications were occurred in the manual compression *** incidence of any groin complication was obviously higher in subjects with manual compression than patients with ProGlide devices(15.71%vs.2.86%,P=0.009).In addition,compared with the manual compression group,the ProGlide group was associated with significantly shorter total time in the electrophysiology laboratory[112.0(93.3–128.8)min vs.123.5(107.3–158.3)min,P=0.006],time from sheath removal until venous site hemostasis[3.8(3.4–4.2)min vs.8.0(7.6–8.5)min,P<0.001],bed rest time[8.0(7.6–8.0)h vs.14.1(12.0–17.6)h,P<0.001]and hospital stay after the procedure[13.8(12.5–17.8)h vs.38.0(21.5–41.0)h,P<0.001].CONCLUSIONS Utilization of the double-ProGlide technique for hemostasis after cryoballoon ablation with uninterrupted OAC is feasible and safe,which has the clinical

关键词： balloon interrupted closure

Enhanced mechanical properties of lamellar Cu/Al composites processed via high-temperature accumulative roll bonding

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Transactions of Nonferrous Metals Society of China 2019年第8期29卷 1621-1630页

作者： Lin WANG Qing-lin DU Chang LI Xiao-hui CUI Xing ZHAO hai-liang yu State Key Laboratory of High Performance Complex Manufacturing Central South University Changsha 410083 China College of Mechanical and Electrical Engineering Central South University Changsha 410083 China Light Alloys Research Institute Central South University Changsha 410083 China

Cu/Al multilayers were produced by high-temperature accumulative roll bonding(ARB)methods up to three *** achieve a high bonding strength,prior to ARB processing,the Cu and Al sheets were heated to 350,400,450 and 500 ℃,*** mechanical properties were evaluated by tensile *** microstructure was examined by optical microscopy and scanning electron microscopy equipped with energy dispersive *** ultimate tensile stress,the grain size and the thickness of diffusion layer of lamellar composites increase with rolling *** the rolling temperature is 400 ℃,the laminates show the highest ductility,but the yield stress is the *** the rolling temperature further increases,both the yield stress and the ultimate tensile stress increase and the ductility decreases *** mechanical properties of lamellar composites processed by low and high temperature ARB are determined by grain size and the thickness of diffusion layer,respectively.

关键词： diffusion layer Cu/Al multilayers accumulative roll bonding rolling temperature intermetallics mechanical properties