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Fracture morphology and crack mechanism in pure polycrystalline magnesium under tension-compression fatigue testing

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Rare Metals 2020年第2期39卷 162-168页

作者： Li Tan Xi-Yan Zhang Ting Xia guang-jie huang Qing Liu College of Materials Science and Engineering Chongqing UniversityChongqing400045China National Engineering Research Centre for Magnesium Alloy Chongqing UniversityChongqing400045China

The fatigue fracture was characterized and the fracture behavior was analyzed,using scanning electron microscope(SEM)and electron back-scattered diffraction(EBSD),the fatigue tests of two strain amplitude at room temperature were 0.5%and 1.0%respectively,and the results showed that the fatigue deformation of different strain amplitude produced two typical fatigue fracture morphology,and when the strain amplitude was 1.0%,fatigue fracture mechanism of AZ31 magnesium alloy induced by{1012}twins,when the strain amplitude is 0.5%,it was induced by{1012}-{1012}double *** the present study,the average thickness of primary twin is^20μm at amplitude of 0.5%and^80μm at amplitude of 1.%.The thickness of{1012}primary twins was large enough to activate{1012}-{1012}secondary twins at a high strain amplitude,while the thickness of{1012}primary twins was too narrow to activate{1012}-{1012}secondary twins at a low strain amplitude.

关键词： Deformation twinning Magnesium Fracture Fatigue

Mechanical and Corrosion Behavior of a Biomedical Mg–6Zn–0.5Zr Alloy Containing a Large Number of Twins

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Acta Metallurgica Sinica(English Letters) 2023年第3期36卷 439-455页

作者： Chang‑Jian Yan Bo Guan Yun‑Chang Xin Ling‑Yu Zhao guang‑jie huang Rui Hong Xiao‑Bo Chen Paul K.Chu Institute of Corrosion Science and Technology Guangdong 510070China International Joint Laboratory for Light Alloys College of Materials Science and EngineeringChongqing UniversityChongqing 400030China Key Laboratory for Light‑Weight Materials Nanjing Tech UniversityNanjing 210009China School of Mechanical Engineering Yangzhou UniversityYangzhou 225127China School of Engineering RMIT UniversityCarlton 3053VICAustralia Department of Physics Department of Materials Science&EngineeringDepartment of Biomedical EngineeringCity University of Hong KongTat Chee AvenueKowloonHong KongChina Institute of Metal Research Chinese Academy of SciencesShenyang 110016China

The strong texture of Mg alloys can lead to strong tension–compression yield asymmetry and corrosion anisotropy,and this will consequently affect the effectiveness of hard tissue implants.A biomedical Mg–6Zn–0.5Zr alloy containing a large number of{1012}primary twins and{1012}–{1012}secondary twins is successfully prepared by cross *** dual twin structure not only removes the tension–compression yield asymmetry completely,but effectively reduces the corrosion anisotropy without compromise of corrosion *** difference between the largest corrosion rate and smallest one is~1.2 times compared to~1.6 times of the original *** is found that the reduced corrosion anisotropy is related to re-distribution of crystallographic orientations by twins.

关键词： Biomedical Mg alloy Corrosion Mechanical anisotropy Texture Twins

A model for the retrieval of suspended sediment concentrations in Taihu Lake from TM images

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Journal of Geographical Sciences 2006年第4期16卷 458-464页

作者： guang jie WEI Yuchun huang Jiazhu Key Laboratory of Virtual Geographic Environment Ministry of Education Nanjing Normal UniversityNanjing 210097 China

A study was conducted in the Taihu Lake with the aim of deriving a model for the retrieval of suspended sediment （SS） concentrations from Landsat TM images and in situ sampled data. The correlation between suspended sediment concentrations of lake and the reflectance obtained from the TM images is significant. By TM images and in situ sampled data in summer and winter, we obtained a comparative uniform model for the retrieval of suspended sediment concentrations in the Taihu Lake, that is lnSS = a＊（R3/R1）＋ b, where lnSS is the natural logarithm of the suspended sediment concentration, Rl and R3 are the reflectance coincident with the 1st band and the 3rd band in TM images, a and b are the regression coefficients. Furthermore, we analysed the errors particularly to make sure the model is valid. The model is accurate to within 0.33（RMSE）, suggesting that this model may be applicable to predict suspended sediment in the Taihu Lake from TM image throughout the year.

关键词： suspended sediment TM image Taihu Lake

Improvement of strength and ductility of Al-Cu-Li alloy through cryogenic rolling followed by aging

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Transactions of Nonferrous Metals Society of China 2017年第9期27卷 1920-1927页

作者： Yan-jun DENG guang-jie huang Ling-fei CAO Xiao-dong WU Li huang Ming-yong XIA Qing LIU College of Materials Science and Engineering Chongqing University Chongqing 400044 China

To develop an improved approach in achieving an excellent combination of high strength and ductility,the solutionized Al?Cu?Li plates were subjected to rolling at cryogenic and room temperatures,respectively,to a reduction of83%,followed by aging treatment at160°*** results indicate that Al?Cu?Li alloys through cryogenic rolling followed by aging treatment possess better mechanical *** at cryogenic temperature produces a high density of dislocations because of the suppression of dynamic recovery,which in turn promotes the precipitation of T1(Al2CuLi)precipitates during *** high density of T1precipitates enable effective dislocation pinning,leading to an increase in strength and *** contrast,room temperature rolled alloys after aging treatment exhibit lower strength and ductility due to low density of T1precipitates in the grain interior and high density of T1precipitates around subgrain boundaries.

关键词： Al-Cu-Li alloy cryogenic rolling dislocation T1 precipitate

Microstructure characterization of Al-cladded Al-Zn-Mg-Cu sheet in different hot deformation conditions

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Transactions of Nonferrous Metals Society of China 2017年第8期27卷 1689-1697页

作者： Bin LIAO Xiao-dong WU Chang-jian YAN Zheng LIU Yan-li JI Ling-fei CAO guang-jie huang Qing LIU College of Materials Science and Engineering Chongqing University Chongqing 400044 China Suzhou Branch Chinalco Materials Application Research Institute Co. Ltd. Suzhou 215026 China

Al-cladded Al-Zn-Mg-Cu sheets were compressed up to70%reduction on a Gleeble-3500thermo-mechanical simulatorwith temperatures ranging from380to450°C at strain rates *** microstructures of the Al cladding and theAl-Zn-Mg-Cu matrix were characterized by electron back-scattered diffraction(EBSD)and X-ray diffraction(XRD).Themicrostructure is closely related to the level of recovery and recrystallization,which can be influenced by deformation temperature,deformation pass and deformation *** level of recovery and recrystallization are different in the Al cladding and theAl-Zn-Mg-Cu *** deformation temperature results in higher degree of recrystallization and coarser grain *** and recovery can happen during the interval of deformation *** strain rate leads to finer sub-grains atstrain rate below10s-1;however,dynamic recovery and recrystallization are limited at strain rate of30s-1due to shorter duration atelevated temperatures.

关键词： Al-Zn-Mg-Cu alloy Al cladding hot compression recovery recrystallization

Ru doping triggering reconstruction of cobalt phosphide for coupling glycerol electrooxidation with seawater electrolysis

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Journal of Energy Chemistry 2025年第1期100卷 317-326页

作者： Binglu Deng jie Shen Jinxing Lu Chuqiang huang Zhuoyuan Chen Feng Peng Yunpeng Liu School of Materials Science and Hydrogen Energy Foshan University School of Chemistry and Chemical Engineering Guangzhou University guangdong Key Laboratory for Hydrogen Energy Technologies

Seawater electrolysis is a promising approach for sustainable energy without relying on precious ***,the large-scale seawater electrolysis is hindered by low catalytic efficiency and severe anode corrosion caused by the harmful *** contrast to the oxygen evolution reaction （OER）and chlorin ion oxidation reaction （ClOR）,glycerol oxidation reaction （GOR） is more thermodynamically and kinetically favorable ***,a Ru doping cobalt phosphide （Ru-CoP2） is proposed as a robust bifunctional electrocatalyst for seawater electrolysis and GOR,for the concurrent productions of hydrogen and value-added *** in situ and ex situ characterization analyses demonstrated that Ru doping featured in the dynamic reconstruction process from Ru-CoP2to Ru-CoOOH,accounting for the superior GOR *** coupling GOR with hydrogen evolution was realized by employing Ru-CoP2as both anode and cathode,requiring only a low voltage of 1.43 V at 100 mA cm-2,which was 250 m V lower than that in alkaline *** work guides the design of bifunctional electrocatalysts for energy-efficient seawater electrolysis coupled with biomass resource upcycling.

关键词： Glycerol electrooxidation Hydrogen evolution Ru doping Cobalt phosphide Bifunctional electrocatalysts

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PC-1分子在细胞内定位的深入探讨

生物化学与生物物理进展 2004年第3期31卷 260-266页

作者：张浩周建光李杰之黄翠芬军事医学科学院生物工程研究所北京100850

为了寻找影响PC 1分子进入细胞核的序列 ,将该分子不同区段分别与EGFP融合表达 ,通过观察绿色荧光蛋白在细胞内的分布 ,发现PC 1分子的第 112～ 190区段是一独立的功能区 ,缺失这一区段后 ,分子的其余部分能够进入细胞核并在其中积累 ,... 详细信息

为了寻找影响PC 1分子进入细胞核的序列 ,将该分子不同区段分别与EGFP融合表达 ,通过观察绿色荧光蛋白在细胞内的分布 ,发现PC 1分子的第 112～ 190区段是一独立的功能区 ,缺失这一区段后 ,分子的其余部分能够进入细胞核并在其中积累 ,这一区段使PC 1分子被排斥于细胞核之外 ,并在细胞质中浓缩成许多点状结构 .运用以SOS恢复系统为基础的酵母双杂交方法 ,发现PC 1分子能够定位于细胞膜上 ,通过缺失突变发现该分子的第 112～ 190区段是一独立的细胞膜定位信号序列 ,这一序列将其定位于细胞的胞膜上 .

关键词： PC-1 分子细胞核细胞膜定位亚细胞定位酵母双杂交方法基因

A low redox potential and long life organic anode material for sodium-ion batteries

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Journal of Energy Chemistry 2025年第1期100卷 557-564页

作者： Zhi Li Yang Wei Kang Zhou Xin huang Xing Zhou jie Xu Taoyi Kong Junwei Lucas Bao Xiaoli Dong Yonggang Wang Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Institute of New Energy Collaborative Innovation Center of Chemistry for Energy Materials (iChEM) Fudan University Department of Chemistry Boston College School of Materials Science and Engineering Anhui University of Technology

Sodium-ion batteries （SIBs） with organic electrodes are an emerging research direction due to the sustainability of organic materials based on elements like C,H,O,and sodium ***,organic electrode materials for SIBs are mainly used as cathodes because of their relatively high redox potentials（>1 V）.Organic electrodes with low redox potential that can be used as anode are ***,a novel organic anode material （tetrasodium 1,4,5,8-naphthalenetetracarboxylate,Na4TDC） has been developed with low redox potential （<0.7 V） and excellent cyclic *** three-sodium storage mechanism was demonstrated with various in-situ/ex-situ spectroscopy and theoretical calculations,showing a high capacity of 208 mAh/g and an average decay rate of merely 0.022%per ***,the Na4TDC-hard carbon composite can further acquire improved capacity and cycling stability for 1200 cycles even with a high mass loading of up to 20 mg *** pairing with a thick Na3V2（PO4）3cathode (20.6 mg cm-2),the as-fabricated full cell exhibited high operating voltage （2.8 V）,excellent rate performance and cycling stability with a high capacity retention of 88.7% after 200 cycles,well highlighting the Na4TDC anode material for SIBs.

关键词： Organic anode material Low redox potential Composite anode Sodium-ion batteries

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鼠mPC-1基因的克隆与特性分析

生物化学与生物物理进展 2004年第9期31卷 841-846页

作者：梁瑞霞周建光李杰之黄翠芬军事医学科学院生物工程研究所北京100850

为深入研究人前列腺癌相关基因PC 1的生物功能和进化保守状况,从小鼠肾脏中克隆了全长cDNA序列,命名为mPC 1(***0 4 885 2 ).mPC 1基因cDNA全长为 2 193bp,主要定位于小鼠染色体 3A1 A2区域.mPC 1基因最大开放阅读框编码的蛋白质由 2 2 ... 详细信息

为深入研究人前列腺癌相关基因PC 1的生物功能和进化保守状况,从小鼠肾脏中克隆了全长cDNA序列,命名为mPC 1(***0 4 885 2 ).mPC 1基因cDNA全长为 2 193bp,主要定位于小鼠染色体 3A1 A2区域.mPC 1基因最大开放阅读框编码的蛋白质由 2 2 4个氨基酸组成,与人PC 1蛋白编码区存在 82 %的序列一致性,含有coiled coil结构域和PEST结构域.生物信息学分析表明,由 6个外显子组成的mPC 1基因与mD5 2高度同源,其中,第一外显子代表该基因的特异性序列,实验证据显示mPC 1基因具有自己的启动子,推测mPC 1与小鼠mD5 2可能是重叠基因.对小鼠 2 0种组织器官和不同发育阶段的胚胎组织cDNA的RT PCR检测证实,该基因主要在前列腺、肾和眼组织中表达,在胃和平滑肌中有少量表达,在其他组织中表达很弱或不表达.而mD5 2基因则几乎广泛存在于小鼠的各个组织器官中,因此,两个基因虽然序列上高度重叠却是独立调控的.综上所述,mPC 1基因可能是一个与人PC

关键词： mPC-1 新基因与hPC-1同源