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Effect of cryogenic rolling and annealing on the microstructure evolution and mechanical properties of 304 stainless steel

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International Journal of Minerals,Metallurgy and Materials 2017年第6期24卷 638-645页

作者： jin-tao Shi long-gang Hou jin-rong zuo lin-zhong Zhuang Ji-shan Zhang State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing 100083 China

Metastable 304 austenitic stainless steel was subjected to rolling at cryogenic and room temperatures, followed by annealing at different temperatures from 500 to 950°C. Phase transition during annealing was studied using X-ray diffractometry. Transmission electron microscopy and electron backscattered diffraction were used to characterize the martensite transformation and the distribution of austenite grain size after annealing. The recrystallization mechanism during cryogenic rolling was a reversal of martensite into austenite and austenite growth. Cryogenic rolling followed by annealing refined grains to 4.7 μm compared with 8.7 μm achieved under room-temperature rolling, as shown by the electron backscattered diffraction images. Tensile tests showed significantly improved mechanical properties after cryogenic rolling as the yield strength was enhanced by 47% compared with room-temperature rolling.

关键词： stainless steel cryogenic rolling annealing microstructural evolution mechanical properties recrystallization

long-term changes in the fishery ecosystem structure of Laizhou Bay,China

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Science China Earth Sciences 2013年第3期56卷 366-374页

作者： jin XianShi SHAN XiuJuan LI XianSen WANG Jun cui yi zuo tao Key Laboratory for Sustainable Utilization of Marine Fisheries Ministry of AgricultureYellow Sea Fisheries Research InstituteChinese Academy of Fishery Sciences Key Laboratory for Fishery Resources and Eco-environment Shandong ProvinceYellow Sea Fisheries Research InstituteChinese Academy of Fishery Sciences

Laizhou Bay provides a critical spawning and nursery habitat for many fishery species, including commercially important spe- cies, such as Fenneropenaeus chinensis and Larimichthys polyactis. The bay is severely stressed due to high fishing pressure and environmental changes. Based on the long-term ecosystem surveys in Laizhou Bay during the main spawning period （May） of most fishery species from 1959 to 2008, the responses of the Laizhou Bay fishery ecosystem were analyzed here, including regime shifts in species composition, biomass, species diversity, zooplankton, phytoplankton, and environmental variables. The dominant species of large-size and high economic value （e.g. Trichiurus haumela, L. polyactis） have been replaced by the short-lived, low-trophic-level planktivorous pelagic species （e.g. Setipinna taty, Engraulisjaponicus） since the 1980s, and it is probable that the small-sized pelagic fishes have been recently replaced by invertebrates （e.g. Oratosquilla oratoria, Crangon affinis）. The biomass of fishery resources declined continuously from 423.6 kg haul 1 h-1 in 1959 to 164.6 kg haul-l h i in 1982, 37.7 kg haul-1 h-1 in 1993, and less than 8 kg haul 1 h-a in 1998-2008. Moreover, the biomass of zooplankton showed an increasing trend during 1959-2006, but showed a slight decline in 2008. The abundance of phytoplankton increased from 1959 through 1982, decreased substantially in 1993, and increased again until 2004. More recently, however, the phytoplankton abundance was very low. The sea surface temperature （SST） and sea bottom temperature （SBT） in May increased by 0.23~C a-~ and 0.16~C a-~, respectively, during 1982-2008. The salinity in May showed large fluctuations and reached its lowest val- ues in 2004 and 2006. The ratio of dissolved inorganic nitrogen （DIN） to dissolved inorganic phosphate （DIP） increased. However, the dissolved silicon （DSi）：DIP and DSi：DIN ratios decreased to a low level during 1959-2008. These changes seri- ously impacted prima

关键词： long-term changes fishery ecosystem multi-stress Laizhou Bay

Removal of cyclops in pre-oxidizing cooperation water treatment process

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第11期8卷 1826-1830页

作者： LIU Dong-mei cui fu-yi WU Ya-qin lin tao ZHANG Min YU Ming-xue School of Municipal and Environmental Engineering Harbin Institute of Technology Harbin 150090 China State Key Laboratory of Urban Water Resource and Environment Harbin 150090 China College of Environmental Science and Engineering Hohai University Nanjing 210098 China

Zooplankton cyclops propagates profusely in waterbody, cannot be effectively inactivated by conventional disinfection process, and becomes a troublesome drinking water treatment problem. In this work, the qualitative and quantitative experimental studies were carried out on inactivation of zooplankton cyclops using oxidants, such as chlorine （Cl2）, chlorine dioxide （ClO2）, ozone （O3）, hydrogen peroxide （H2O2）, ozone/hydrogen peroxide （O3/H2O2）, chloramines （Cl2-NH3） and potassium permanganate （KM4nO4）. The influences of various factors include different oxidant dosages, organic substance contents and pH values. The results showed that currently available oxidants used all might inactivate cyclops in some extent. According to the experimental results, chlorine dioxide, ozone, ozone/hydrogen peroxide and chloramines can be selected as effective oxidants for inactivating cyclops because of their strong inactivation abilities. Then the synergic removal effects on cyclops with ozone, ozone/hydrogen peroxide pre-oxidation followed by conventional water treatment processes were investigated, The results showed that ozone and ozone/hydrogen peroxide pre-oxidation can inactivate cyclops effectively, which then can be removed thoroughly by conventional water treatment processes. Cyclops cannot appear in water after filtration with 1.65 mg/L of ozone and 6 mg/L of hydrogen peroxide, with the inactivation rate being 62% before conventional water treatment processes. Cyclops cannot appear in water after filtration with 1.8 mg/L of ozone, with the inactivation rate being 50% before conventional water treatment processes. For different oxidants, when removal rate was the best, the inactivation rate was not the same. These results may provide reference and model for actual waterworks.

关键词： Cyclops of zooplankton Water treatment Inactivation 03 O3/H2O2 pre-oxidation

Periodic synchronization in a system of coupled phase oscillators with attractive and repulsive interactions

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Frontiers of physics 2018年第3期13卷 163-169页

作者： Chong Xiao Jun-long Tian Fang lin Dong-Wei Ma jing Zhang Hai-tao cui yi Xiao School of Physics and Electrical Engineering Anyang Normal University Anyang 455000 China School of Physics Huazhong University of Science and Technology Wuhan 430074 China

In this study we investigate the collective behavior of the generalized Kuramoto model with an ex- ternal pinning force in which oscillators with positive and negative coupling strengths are conformists and contrarians, respectively. We focus on a situation in which the natural frequencies of the oscilla- tors follow a uniform probability density. By numerically simulating the model, it is shown that the model supports multistable synchronized states such as a traveling wave state, π state and periodic synchronous state： an oscillating π state. The oscillating π state may be characterized by the phase distribution oscillating in a confined region and the phase difference between conformists and contrar- ians oscillating around π periodically. In addition, we present the parameter space of the oscillating state and traveling wave state of the model.

关键词： generalized Kuramoto model pinning force conformists contrarians oscillating π state

Runx1 is a key regulator of articular cartilage homeostasis by orchestrating YAP,TGFβ,and Wnt signaling in articular cartilage formation and osteoarthritis

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Bone Research 2022年第4期10卷 882-892页

作者： Yan Zhang tao zuo Abigail McVicar Hui-lin Yang yi-Ping Li Wei Chen Department of Pathology University of Alabama at BirminghamBirminghamAL 35294USA Key Laboratory of Biomedical Information Engineering of Ministry of Education Biomedical Informatics and Genomics CenterSchool of Life Science and TechnologyXi’an Jiaotong UniversityXi’an 710049 ShaanxiP.R.China Department of Orthopaedics the First Affiliated Hospital of Soochow UniversityOrthopaedic Institute of Soochow University899 Pinghai RoadSuzhou 215031 JiangsuP.R.China Division in Cellular and Molecular Medicine Department of Pathology and Laboratory MedicineTulane University School of MedicineTulane UniversityNew OrleansLA 70112USA

Runt-related transcription factor 1(Runx1)plays a key role in cartilage formation,but its function in articular cartilage formation is *** generated non-inducible and inducible Runx1-deficient mice(Runx1^(f/f)Col2α1-Cre and Runx1^(f/f)Col2α1-CreER mice)and found that chondrocyte-specific Runx1-deficient mice developed a spontaneous osteoarthritis(OA)-like phenotype and showed exacerbated articular cartilage destruction under OA,characterized by articular cartilage degradation and cartilage ossification,with decreased Col2α1 expression and increased Mmp13 and Adamts5 ***-sequencing analysis of hip articular cartilage from the Runx1^(f/f)Col2α1-Cre mice compared to that from wild-type mice and subsequent validation analyses demonstrated that Runx1 is a central regulator in multiple signaling pathways,converging signals of the Hippo/Yap,TGFβ/Smad,and Wnt/β-catenin pathways into a complex network to regulate the expression of downstream genes,thereby controlling a series of osteoarthritic pathological ***-sequencing analysis of mutant knee joints showed that Runx1’s role in signaling pathways in articular cartilage is different from that in whole knee joints,indicating that Runx1 regulation is *** analysis confirmed that Runx1 deficiency decreased the levels of YAP and p-Smad2/3 and increased the levels of activeβ-*** of Runx1 dramatically increased YAP expression in ***-associated virus-mediated Runx1 overexpression in the knee joints of osteoarthritic mice showed the protective effect of Runx1 on articular cartilage damaged in *** results notably showed that Runx1 is a central regulator of articular cartilage homeostasis by orchestrating the YAP,TGFβ,and Wnt signaling pathways in the formation of articular cartilage and OA,and targeting Runx1 and its downstream genes may facilitate the design of novel therapeutic approaches for OA.

关键词： cartilage homeostasis protective

Achieving High‑Quality Aluminum to Copper Dissimilar Metals Joint via Friction Stir Double‑Riveting Welding

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Acta Metallurgica Sinica(English Letters) 2023年第4期36卷 552-572页

作者： Shude Ji Xiao cui lin Ma Hua Liu yingying zuo Zhiqing Zhang College of Aerospace Engineering Shenyang Aerospace UniversityShenyang 110136China

In order to achieve a high-quality joining of aluminum(Al)and copper(Cu)dissimilar metals,a new friction stir doubleriveting welding(FSDRW)with a Cu rod as the rivet was proposed,and the rotating tool with a large concave angle shoulder was specially *** results showed that under the thermal–mechanical effect of rotating tool,the Cu rod was deformed to be a double riveting heads structure with a Cu anchor at the upper surface of Al plate and an Al anchor above the lap interface of joint,and these two anchors greatly enhanced the mechanical interlocking of Al/Cu *** effective bonding interfaces were formed among the double riveting heads structure,the upper Al plate and the lower Cu plate,which contained the Cu/Cu interface and the Al/Cu *** Cu/Cu interface without the kissing bond and the Al/Cu interface with the rationally thin AlCu and Al_(2)Cu intermetallic compounds(IMCs)layers were beneficial to heightening the joint tensile shear *** maximum tensile shear load of the FSDRW joint achieved 5.52 kN,and the joint under different plunging depths of rotating tool presented a mixed mode of ductile fracture and brittle *** novel FSDRW technique owns the advantages of strong mechanical interlocking and superb metallurgical bonding,and provides a new approach to acquiring a high-quality Al/Cu dissimilar metals joint.

关键词： Al/Cu dissimilar metals joint Friction stir double-riveting welding Bonding interface Mechanical interlocking Tensile shear load

Numerical investigation on particles removal by bubble flotation in swirling flow

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Journal of Iron and Steel Research International 2022年第6期29卷 961-972页

作者： He-nan cui tao Li Yu-lin Zhu Min Tan College of Materials Science and Engineering Chongqing UniversityChongqing 400044China Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and Advanced Materials Chongqing UniversityChongqing 400044China College of Metallurgy and Energy North China University of Science and TechnologyTangshan 063210HebeiChina

The removal of particles is of great importance in many fields including effluent treatment,mineral separation,clean metal production,***,most of the researchers paid their attention to the two-phase flow involving gas–liquid or solid–liquid *** motion and interaction between bubbles and particles in the swirling three-phase flow field were simulated by discrete phase *** swirling flow and the collision between bubbles and particles were governed by compiling the user-defined function *** centripetal pressure gradient force pushes the discrete phases toward the central region,where the collision rate between particle and bubbles is improved ***,it proved beneficially for particle removal to increase the swirling velocity,particularly for larger ***,bubble flotation is an effective method to remove particles from the *** swirling velocity was optimized,which is valuable for industrial design.

关键词： Particle removal Swirling flow Blowing bubble Discrete phase model

Novel Coil Winding Method to Realize Pot Heated Evenly

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Journal of Electronic Science and Technology 2015年第2期13卷 107-111页

作者： Mao-Yan Wang Hai-long Li Meng Zhang Zhi-tao Xu cui-lin Zhong Jun Xu School of Physical Electronics University of Electronic Science and Technology of China 41st Institute of China Electronics Technology Group Corporation Centre of Integrated Electronics Shenzhen Institutes of Advanced TechnologyChinese Academy of Sciences

To solve the problem about the inhomogeneous thermal effect of pot heated by coils along the circumference, a novel coil winding method is proposed and compared with the general winding method in the paper. First, based on the Biot-Savart law and Ampere＇s rule, the magnetic induction generated by a straight current carrying conductor and a current loop is discussed, respectively. Then the novel coil winding method is developed by adjusting the location of inhomogeneous joints. The joints are periodically scattered along the circumferential direction and symmetrically designed around the central *** results show that the quite non-uniform temperature in the base of pot at the circular direction is effectively improved by using the proposed winding method. The potential danger produced by high temperature at some region of coils plate is *** is energy-efficient and safe for residential appliances.

关键词： winding inhomogeneous straight joints periodically scattered carrying circular adjusting heating

The Uptake and Distribution Evidence of Nano-and Microplastics in vivo after a Single High Dose of Oral Exposure

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Biomedical and Environmental Sciences 2024年第1期37卷 31-41页

作者： HONG tao SUN Wei DENG Yuan LYU Jian Da jin cui Hong BAI ying long NA Jun ZHANG Rui GAO Yuan PAN Guo Wei YANG zuo Sen YAN ling Jun Research Center for Universal Health School of Public HealthChina Medical UniversityShenyang 110122LiaoningChina Department of Pain Management Shengjing Hospital of China Medical UniversityShenyang 110004LiaoningChina Department of Toxicology School of Public HealthChina Medical UniversityShenyang 110122LiaoningChina Department of Maternal and Child Health School of Public HealthChina Medical UniversityShenyang 110122LiaoningChina Institute of Preventive Medicine China Medical UniversityShenyang 110122LiaoningChina Institute of Chronic Diseases Liaoning Provincial Center for Disease Control and PreventionShenyang 110000LiaoningChina

Objective Tissue uptake and distribution of nano-/microplastics was studied at a single high dose by gavage in *** Fluorescent microspheres(100 nm,3μm,and 10μm)were given once at a dose of 200 mg/(kg∙body weight).The fluorescence intensity(FI)in observed organs was measured using the IVIS Spectrum at 0.5,1,2,and 4 h after *** was performed to corroborate these *** In the 100 nm group,the FI of the stomach and small intestine were highest at 0.5 h,and the FI of the large intestine,excrement,lung,kidney,liver,and skeletal muscles were highest at 4 h compared with the control group(Pfurther verified by *** peak time of nanoplastic absorption in blood was *** Nanoplastics translocated rapidly to observed organs/tissues through blood circulation;however,only small amounts of MPs could penetrate the organs.

关键词： Microplastics Nanoplastics IVIS Spectrum small-animal imaging system Tissue distribution Blood