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HYDROGEN EFFECT ON DEFORMATION BEHMIOR OF TITANIUM ALLOY AT HIGH TEMPERATURE

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Acta Metallurgica Sinica(English Letters) 1998年第3期11卷 190-196页

作者： C.H.Zhou k.yang D.F.Li Y.X.Lu Inst of Metal Research The Chinese Acad of Sciences Shenyang China

The effect of hydrogen on the deformation behavior of three typical kinds of titanium alloys, pure Ti, Ti-6Al-4V and Ti-15V-3Cr-3Al-3Sn (Ti-15-3), at high temperature has been investigated by short time creep test. XRD and TEM techniques are used to examine the changes in their microstructures. The results show that deformation rutes of pure Ti and Ti-6Al-4V alloy can be greatly increased by hydorgen charping due to an increase of β phase volume in their microstructures. β→α transformation is found to occur in unchanged Ti-15-3 alloy during creep process. The addition of 0. 73wt% hydrogen can completely inhibit the deformation-induced transformation and strengthen the metastable β phase in Ti-15-3 alloy, resulting in a dramatic decrease of deformation rate of this alloy at 700° C.

关键词： titanium hydrogen thermal deformation

Cu-assisted austenite reversion and enhanced TRIP effect in maraging stainless steels

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Journal of Materials Science & Technology 2022年第9期104卷 52-58页

作者： M.C.Niu k.yang J.H.Luan W.Wang Z.B.Jiao School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Shi-changxu Innovation Center for Advance Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Department of Mechanical Engineering The Hong Kong Polytechnic UniversityHong KongChina Department of Materials Science and Engineering City University of Hong KongHong KongChina The Hong kong Polytechnic University Shenzhen Research Institute ShenzhenGuangdongChina

Control of the formation and stability of reverted austenite is critical in achieving a favorable combination of strength,ductility,and toughness in high-strength *** this work,the effects of Cu precipitation on the austenite reversion and mechanical properties of maraging stainless steels were investigated by atom probe tomography,transmission electron microscopy,and mechanical *** results indicate that Cu accelerates the austenite reversion kinetics in two manners:first,Cu,as an austenite stabilizer,increases the equilibrium austenite fraction and hence enhances the chemical driving force for the austenite formation,and second,Cu-rich nanoprecipitates promote the austenite reversion by serving as heterogeneous nucleation sites and providing Ni-enriched chemical conditions through interfacial *** addition,the Cu precipitation hardening compensates the strength drop induced by the formation of soft reverted *** tensile deformation,the metastable reverted austenite transforms to martensite,which substantially improves the ductility and toughness through a transformation-induced plasticity(TRIP)*** Cu-added maraging stainless steel exhibits a superior combination of a yield strength of~1.3 GPa,an elongation of~15%,and an impact toughness of~58 J.

关键词： Maraging stainless steel TRIP effect Austenite reversion Cu-rich nanoprecipitate

IMPROVED PROCESSING FOR MICROSTRUCTURES AND MECHANICAL PROPERTIES OF A COMMERCIAL PIPELINE STEEL

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Acta Metallurgica Sinica(English Letters) 2005年第2期18卷 121-128页

作者： Y.C.Wang Y.S.Li M.C.Zhao k.yang SchoolofMaterial＆ChemicalEngineering JiangxiUniversityofScienceandTechnologyGanzhou341000China InstituteofMetalResearch TheChineseAcademyofSciencesShenyang110016China

The transformation productions of hot-deformation simulation experiments were investigated using a Gleeble-1500 hot simulator for a commercial pipeline steel. Based on the investigation results, the improved thermo-mechanical control processing (TMCP) schedules containing a two stage multi-pass controlled rolling coupled with moderate cooling rates were applied to hot rolling experiments and acicular ferrite dominated microstructure was obtained. Microstructures and mechanical properties of hot rolled plates were related to TMCP processing, and regression equations describing the relation between processing parameters and mechanical properties in the current TMCP were developed, which could be used to predict mechanical properties of the experimental steel during commercially processing. It was found that with an increase in cooling rate after hot rolling, grain size in the microstructure became smaller, the amount of polygonal ferrite decreased and acicular ferrite increased, and accordingly mechanical properties increased.

关键词： hot-deformation simulation thermo-mechanical control processing acicular ferrite dominated microstructure

High-power passively Q-switched 2 μm all-solid-state laser based on a Bi_2Te_3 saturable absorber

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Photonics Research 2017年第5期5卷 461-466页

作者： X.LIU k.yang S.ZHAO T.LI W.QIAO H.ZHANG B.ZHANG J.HE J.BIAN L.ZHENG L.SU J.XU School of Information Science and Engineering and Shandong Provincial Key Laboratory of Laser Technology and ApplicationShandong University State key Laboratory of Crystal Material Shandong University State key Laboratory of Pulsed Power Laser Technology key Laboratory of Transparent and Opto-functional Inorganic Materials Artificial Crystal Research Center Shanghai Institute of CeramicsChinese Academy of Sciences School of Physics Science and Engineering Institute for Advanced Study Tongji University

By using the ultrasound-assisted liquid phase exfoliation method, Bi_2Te_3 nanosheets are synthesized and deposited onto a quartz plate to form a kind of saturable absorber(SA), in which nonlinear absorption properties around 2 μm are analyzed with a home-made mode-locked laser. With the as-prepared Bi_2Te_3 SA employed,a stable passively Q-switched all-solid-state 2 μm laser is successfully realized. Q-switched pulses with a maximum average output power of 2.03 W are generated under an output coupling of 5%, corresponding to the maximum single-pulse energy of 18.4 μJ and peak power of 23 W. The delivered shortest pulse duration and maximum repetition rate are 620 ns and 118 k Hz under an output coupling of 2%, respectively. It is the first presentation of such Bi_2Te_3 SA employed in a solid-state Q-switched crystalline laser at 2 μm, to the best of our knowledge. In comparison with other 2 D materials suitable for pulsed 2 μm lasers, the saturable absorption performance of Bi_2Te_3 SA is proved to be promising in generating high power and high-repetition-rate 2 μm laser pulses.

关键词： Te SA m all-solid-state laser based on a Bi2Te3 saturable absorber High-power passively Q-switched 2 Bi

Carvedilol induces biased β1 adrenergic receptor-cGMP signaling in heart

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中国药理学与毒理学杂志 2019年第10期 801-801页

作者： WANG Qing-tong WEI Wei XIANG k.yang Institute of Clinical Pharmacology Anhui Medical University Key Laboratory of Anti-inflammatory and Immune Medicine Ministry of Education Department of Pharmacology University of California at Davis

OBJECTIVE To elucidate the potential mechanism of carvedilol in treating heart failure and hypertension. METHODS Obesity and diabetes wild type mice induced by feeding with high fat diet(HFD) were treated with beta-blocker carvedilol or metoprolol. The signaling was detected using fluorescence resonance energy transfer assay and cardiac contractile function was examined both in vivo and in vitro. RESULTS Both carvedilol and metoprolol significantly improves cardiac dysfunction in comparison to control HFD mice treated with ***, carvedilol treatment induces the phosphorylation of cardiac beta1 adrenergic receptor(beta1AR)thus triggers plasma membrane cAMP-PkA signaling of myocytes and modulates the activity of EC coupling related proteins. Interestingly, carvedilol rescues the contractility of myocytes independent of calcium amplitude but depends on the phosphorylation of myosin binding protein C through beta1 AR-c GMP pathway. CONCLUSION These studies elucidate a novel mechanism by which carvedilol improves cardiac function in diabetic heart.

关键词： carvedilol diabetic cardiomypathy β1 adrenergic receptor

Study of Electrical and Optical Properties of InGaN/AIGaN Double Heterostructure Blue Light Emitting Diodes

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Study of Electrical and Optical Properties of InGaN/AIGaN Do...

Genomic,transcriptomic,and metabolomic analysis of Oldenlandia corymbosa reveals the biosynthesis and mode of action of anti-cancer metabolites

1998 5th International Conference on Solid-State and Integrated Circuit Technology

作者： B.Shen H.T.Shi k.yang Z.Z.Chen Y.G.Zhou P.Chen R.Zhang Y.D.Zheng Department of Physics and Laboratory of Solid State MicrostructuresNanjing University

The electrical and optical properties of the double heterostructure blue light-emitting diodes,with InGaN:Zn,Si active layer,made by Nichia *** investigated at various *** of the forward bias current-voltage behavior of the device demonstrates a departure from the Shockley model of p-n diodes,and it is observed that the dominant mechanism of carrier transport across the junction is associated with carrier *** experiments of the devices indicates that there are an emission peak located at 2.80 eV,and a relatively weaker short-wavelength peak at 3.2 eV.A significant blue shifts of the optical emission peak which is consistent with the tunneling character of electrical characteristics was ***,we studied the properties of electroluminescence under various pulsed currents,and a degradation inⅠ-Ⅴcharacteristics and a low resistance ohmic short were observed.

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Journal of Integrative Plant Biology 2023年第6期65卷 1442-1466页

作者： Irene Julca Daniela Mutwil-Anderwald Vaishnervi Manoj Zahra khan Soak kuan Lai Lay k.yang Ing T.Beh Jerzy Dziekan Yoon P.Lim Shen k.Lim Yee W.Low Yuen I.Lam Seth Tjia Yuguang Mu Qiao W.Tan Przemyslaw Nuc Le M.Choo Gillian khew Loo Shining Antony kam James P.Tam Zbynek Bozdech Maximilian Schmidt Bjoern Usadel Yoganathan kanagasundaram Saleh Alseekh Alisdair Fernie Hoi Y.Li Marek Mutwil School of Biological Sciences Nanyang Technological UniversitySingapore 639798Singapore Shared Analytics Singapore Institute of Food and Biotechnology Innovation(SIFBI)Agency for ScienceTechnology and Research(A*STAR)Singapore 138671Singapore Department of Biochemistry National University of SingaporeSingapore 117596Singapore Singapore Botanic Gardens Singapore 259569Singapore Department of Gene Expression Faculty of BiologyInstitute of Molecular Biology and BiotechnologyAdam Mickiewicz UniversityPoznan 61-614Poland IBG-4 Bioinformatics Forschungszentrum JülichJülich 52428Germany Max-Planck-Institut für Molekulare Pflanzenphysiologie Potsdam-Golm 14476Germany Center of Plant Systems Biology and Biotechnology Plovdiv 4000Bulgaria

Plants accumulate a vast array of secondary metabolites,which constitute a natural resource for *** corymbosa belongs to the Rubiaceae family,and has been used in traditional medicine to treat different diseases,including ***,the active metabolites of the plant,their biosynthetic pathway and mode of action in cancer are *** fill these gaps,we exposed this plant to eight different stress conditions and combined different omics data capturing gene expression,metabolic profiles,and anti-cancer *** results show that *** extracts are active against breast cancer cell lines and that ursolic acid is responsible for this ***,we assembled a high-quality genome and uncovered two genes involved in the biosynthesis of ursolic ***,we also revealed that ursolic acid causes mitotic catastrophe in cancer cells and identified three high-confidence protein binding targets by Cellular Thermal Shift Assay(CETSA)and reverse ***,these results constitute a valuable resource to further characterize the biosynthesis of active metabolites in the Oldenlandia group,while the mode of action of ursolic acid will allow us to further develop this valuable compound.

关键词： genome medicinal metabolomics mode of action transcriptome

乳腺良恶性病变采用乳腺数字体层摄影与数字摄影诊断正确性的对照性研究:meta分析

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国际医学放射学杂志 2014年第3期 293-294页

作者： J.Lei P.yang L.Zhang Y.Wang k.yang 秦乃姗 Evidence-based Medicine Center School of Basic Medical SciencesLanzhou University

摘要目的评价乳腺数字体层摄影(DBT)与乳腺数字摄影(DM)对乳腺良恶性病变的诊断。方法在PubMed、EMBASE、Cochrane图书馆、科学网和中国生物医学文献数据

关键词：乳腺乳房体层摄影 meta 良恶性病变数字摄影

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新一代2.0L4缸汽油机冷却系统的开发

汽车与新动力 2020年第3期3卷 54-58页

作者： [韩]T.CHANG [韩]M.PARk [韩]k.kIM [韩]k.yang 武涛(译) 不详

为满足日益严格的全球燃油经济性要求,流量主动控制、缸间钻孔和快速加热等各种先进的发动机冷却技术得以应用。韩国现代汽车公司最近开发了新一代2.0L4缸汽油机,采用了几种新的冷却系统技术。从概念设计阶段到预生产阶段,总结了三维计... 详细信息

为满足日益严格的全球燃油经济性要求,流量主动控制、缸间钻孔和快速加热等各种先进的发动机冷却技术得以应用。韩国现代汽车公司最近开发了新一代2.0L4缸汽油机,采用了几种新的冷却系统技术。从概念设计阶段到预生产阶段,总结了三维计算机辅助工程(CAE)分析在发动机冷却性能评价中的应用。对缸盖和缸体水套中的冷却液流动进行了研究,找出了最佳方案,并通过优化缸垫孔对其进行了进一步的改进。在制造首台试验发动机之前,进行了三维温度模拟,以满足工程样机阶段的开发标准。为降低发动机温度或提高生产率,在新开发的发动机上研究并实施了一些水套的设计,如快速加热的缸体水套隔板、集成EGR冷却器的缸体、集成排气歧管的缸盖等。这些设计在试验阶段呈现了良好的效果。采用了三维热流CAE分析,对各系统进行了详细的物理现象研究,并提出了解决方案。结果表明,新一代发动机的冷却系统具有足够的热稳定性。

关键词：汽油机冷却系统三维设计燃油经济性