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Microstructures and mechanical properties of a commercial Mg-Al-Zn-Mn alloy with various hot-extrusion processes

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rare Metals 2024年第3期43卷 1329-1336页

作者： he Ma Fan-{1. Meng Qiang Yang Ze-Feng Xie Yuan-Ding Huang Xin Qiu state Key Laboratory of rare Earth resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022China school of Materials science and engineering Changchun University of Science and TechnologyChangchun130022China MagIC-Magnesium Innovation Center Helmholtz-Zentrum Geesthacht21502GeesthachtGermany engineering research Center of Optoelectronic Functional Materials Ministry of EducationChangchun University of Science and TechnologyChangchun130022China

Mg-Al-Zn-Mn(AZ)system alloys have become widely used due to their good castability,excellent formability and outstanding corrosion resistance[1.6].However,their strength is still much lower than that of traditional Mg... 详细信息

关键词： alloys alloy corrosion

study on Theory and Application of the Energy Method used for Analyzing Compressive Instability in sheet Forming

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厦门大学学报（自然科学版） 2002年第S1期41卷 126-127页

作者： XIONG zhi-qing 1. XIE Lan-s{1.ng 2 (1. department of mechanical engineering, Nanjing institute of Techno logy, Nanjing 21.01., china 2. College of mechanical and Electrical engineering, Nanjing University of Aer onautics and Astronautics, Nanjing 21.01., china)

It is pointed out that there was serious weakness w he n using the energy method for studying compressive plastic instability in sheet forming in the past. Where applying the deduced instability strengths to relativ e engineering analysis, theoretical solutions were away from practices. Its basi c reason is that simplified process in mathematical analysis of elastic bending energy was completely applied to that of plastic bending energy. Where the cambe r expressed by function of displacement normal to a plate was approximated to re alistic deflective camber, the displacement of deflected plate to compressed dir ection was neglected. With the aid of the improved instability strengths, the pr edictions on both critical buckling dimension of blank in cup deep-drawing with out blankholder through cylindrical die or conical die and the minimum blankhold er pressure to prevent buckling under constant load are universally in agreement with both experimental results and experiential data. On the bases of above-mentioned improvement, the approximate expressions for bo th the curvature and the twist used in equation of the energy of elastic bending are also ameliorated. Thus the obtained general equations for both the energy a nd the work done by internal force in plastic bending of a plate are more precis e than before. In the analyses of plastic buckling of shell with bending moment, the effect of bending moment is considered through the work done by simulative bending for ce. The method proposed in this paper can not only simplify analyses but also ge t practical result.

关键词： sheet forming deep-drawing buckling energy me thod

1.B-doped MCp detector developed for neutron resonance imaging at Back-n white neutron source

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Nuclear science and Techniques 2024年第8期35卷 58-68页

作者： Qiang Li Li‑Jiao Wang Jing‑Yu Tang Xiang‑Biao Qiu Zhen Chen Mao‑Yuan Zhao Chang‑Jun Ning Kai pan Wei Xu Tao Li su‑peng Lu Han Yi rui‑rui Fan Chang‑Qing Feng rong Zhang Xiao‑Yang sun Qi An Hao‑Fan Bai Jiang‑Bo Bai Jie Bao ping Cao Qi‑ping Chen Yong‑Hao Chen Zeng‑Qi Cui An‑Chuan Fan Fan‑Zhen Feng Min‑Hao Gu Chang‑Cai Han Zi‑Jie Han Guo‑Zhu he Yong‑Cheng he Yang Hong Yi‑Wei Hu Han‑Xiong Huang Wei Jiang zhi‑Jie Jiang Zheng‑Yao Jin Ling Kang Bo Li Gong Li Xiao Li Yang Li Jie Liu rong Liu shu‑Bin Liu Yi‑Na Liu Guang‑Yuan Luan Jie ren zhi‑Zhou ren Xi‑Chao ruan Zhao‑Hui song Kang sun zhi‑Xin Tan sheng‑Da Tang Jin‑Cheng Wang peng‑Cheng Wang Zhao‑Hui Wang Zhong‑Wei Wen Xiao‑Guang Wu Xuan Wu Cong Xia Yong‑Ji Yu Guo‑Hui Zhang Hang‑Chang Zhang Lin‑Hao Zhang Qi‑Wei Zhang Xian‑peng Zhang Yu‑Liang Zhang Yue Zhang zhi‑Yong Zhang zhi‑Hao Zhou Ke‑Jun Zhu Chong Zou institute of High Energy physics Chinese Academy of Sciences(CAS)Beijing 100049China spallation Neutron source science Center Dongguan 523803China state Key Laboratory of particle Detection and Electronics Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Dongguan songshan Lake Future school Dongguan 523808China school of Nuclear science and technology University of Science and Technology of ChinaHefei 230027China state Key Laboratory of particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China North Night Vision science and technology(Nanjing)research {1. Co.Ltd Nanjing 211106China department of Modern physics University of Science and Technology of ChinaHefei 230026China state Key Laboratory of Nuclear physics and technology School of PhysicsPeking UniversityBeijing 100871China institute of Modern physics Fudan UniversityShanghai 200433China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China china Academy of {1. physics Institute of Nuclear Physics and ChemistryMianyang 621900China UsTC archaeometry lab University of Science and Technology of ChinaHefei 230026China Northwest institute of Nuclear {1. Xi’an 710024China University of Chinese Academy of sciences Beijing 100049China china shipbuilding Trading Co. LtdBeijing 100044China

Neutron resonance imaging(NrI)has recently emerged as an appealing technique for neutron *** complexity surpasses that of conventional transmission imaging,as it requires a high demand for both a neutron source and ***,the progression of NrI {1. has been sluggish since its inception in the 1.80s,particularly considering the limited studies analyzing the neutron energy range above *** white neutron source(Back-n)at the china spallation Neutron source(CsNs)provides favorable beam conditions for the development of the NrI technique over a wide neutron energy range from eV to ***-sensitive microchannel plates(MCp)have emerged as a cutting-edge tool in the field of neutron detection owing to their high temporal and spatial resolutions,high detection efficiency,and low *** this study,we report the development of a 1.B-doped MCp detector,along with its associated electronics,data processing system,and NrI experiments at the *** heavy elements such as gold,silver,tungsten,and indium can be easily identified in the transmission images by their characteristic resonance peaks in the 1.1.0 eV energy range;the more difficult medium-weight elements such as iron,copper,and aluminum with resonance peaks in the 1.1.0 keV energy range can also be *** particular,results in the neutron energy range of dozens of keV(Aluminum)are reported here for the first time.

关键词： Neutron resonance imaging 1.B doped MCp detector White neutron source sample nuclide identification

study of the response of 1.B-doped MCp to wide-energy range neutrons from eV to MeV

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Nuclear science and Techniques 2024年第8期35卷 132-141页

作者： Qiang Li Li‑Jiao Wang Xiang‑Biao Qiu Jing‑Wen Li Wei Xu Tao Li Ze‑Bin Lin Chang‑Jun Ning Yong‑Hao Chen rui‑rui Fan Kang sun Jing‑Yu Tang {1. Zhang Han‑Tao Jing Bo Mei Qi An Hao‑Fan Bai Jiang‑Bo Bai Jie Bao ping Cao Qi‑ping Chen Zhen Chen Zeng‑Qi Cui An‑Chuan Fan Chang‑Qing Feng Fan‑Zhen Feng Ke‑Qing Gao Min‑Hao Gu Chang‑Cai Han Zi‑Jie Han Guo‑Zhu he Yong‑Cheng he Yang Hong Yi‑Wei Hu Han‑Xiong Huang Wei‑Hua Jia Hao‑Yu Jiang Wei Jiang zhi‑Jie Jiang Zheng‑Yao Jin Ling Kang Bo Li Chao Li Gong Li Jia‑Wen Li Xiao Li Yang Li Jie Liu {1. Liu shu‑Bin Liu Guang‑Yuan Luan Bin‑Bin Qi Jie ren zhi‑Zhou ren Xi‑Chao ruan Zhao‑Hui song zhi‑Xin Tan sheng‑Da Tang peng‑Cheng Wang Zhao‑Hui Wang Zhong‑Wei Wen Xiao‑Guang Wu Xuan Wu Li‑Kun Xie Yi‑Wei Yang Han Yi Yong‑Ji Yu Guo‑Hui Zhang Lin‑Hao Zhang Mo‑Han Zhang Qi‑Wei Zhang Xian‑peng Zhang Yu‑Liang Zhang Yue Zhang zhi‑Yong Zhang Mao‑Yuan Zhao Lu‑ping Zhou zhi‑Hao Zhou Ke‑Jun Zhu institute of High Energy physics Chinese Academy of Sciences(CAS)Beijing 100049China spallation Neutron source science Center Dongguan 523803China state Key Laboratory of particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Dongguan songshan Lake Future school Dongguan 523808China North Night Vision science&technology(Nanjing)research {1. Co.Ltd. Nanjing 211106China sino‑French institute of Nuclear {1. and technology Sun Yat-sen UniversityZhuhai 519082China school of Nuclear science and technology University of Science and Technology of ChinaHefei 230027China state Key Laboratory of particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China department of Modern physics University of Science and Technology of ChinaHefei 230026China state Key Laboratory of Nuclear physics and technology School of PhysicsPeking UniversityBeijing 100871China institute of Nuclear physics and C{1.mistry China Academy of Engineering PhysicsMianyang 621900China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China UsTC Archaeometry Lab University of Science and Technology of ChinaHefei 230026China Northwest institute of Nuclear {1. Xi’an 710024China University of Chinese Academy of sciences Beijing 100049China

Neutron-sensitive microchannel plates(nMCps)have applications in neutron detection,including energy spectrum measurements,neutron-induced cross sections,and neutron imaging.1.B-doped MCps(B-MCps)have attracted significant attention owing to their potential for exhibiting a high neutron detection efficiency over a large neutron energy *** spatial and temporal resolutions are useful for neutron energy-resolved ***,their practical applications still face many technical *** this study,a B-MCp with 1. mol%1.B was tested for its response to wide-energy neutrons from eV to MeV at the Back-n white neutron source at the china spallation Neutron *** neutron detection efficiency was calibrated at 1.eV,which is approximately 300 times that of an ordinary MCp and indicates the success of 1. B *** factors that caused the reduction in the detection efficiency were simulated and *** neutron energy spectrum obtained using B-MCp was compared with that obtained by other measurement methods,and showed very good consistency for neutron energies below tens of *** response is more complicated at higher neutron energy,at which point the elastic and nonelastic reactions of all nuclides of B-MCp gradually become *** is beneficial for the detection of neutrons,as it compensates for the detection efficiency of B-MCp for high-energy neutrons.

关键词： Neutron radiation image 1.B-doped MCp Neutron response Wide-energy range neutrons

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稀土对渗铝HK40耐热钢氧化性能的影响

稀土 2002年第1期23卷 38-40页

作者：黄志荣徐宏李培宁华东理工大学机械工程系江苏石油化工学院机械工程系江苏常州213016

采用 OM、sEM、EDX及 XrD等仪器设备 ,研究了经渗铝和稀土渗铝处理的 HK40耐热钢在 1. 0 0℃、1.0 0℃、1. 0 0℃空气中氧化的行为。发现经渗铝和稀土渗铝处理的 HK40耐热钢试样 ,其氧化动力学呈抛物线规律 ,经稀土渗铝处理后的试样 ,... 详细信息

采用 OM、sEM、EDX及 XrD等仪器设备 ,研究了经渗铝和稀土渗铝处理的 HK40耐热钢在 1. 0 0℃、1.0 0℃、1. 0 0℃空气中氧化的行为。发现经渗铝和稀土渗铝处理的 HK40耐热钢试样 ,其氧化动力学呈抛物线规律 ,经稀土渗铝处理后的试样 ,其氧化膜的塑性和粘附性得到改善。

关键词：高温氧化稀土元素固体渗铝 HK40耐热钢抗氧化性能铁基耐热钢表面改性

射频激励的铜和金离子激光器中等离子体特性的实验研究

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中国激光 2003年第2期30卷 120-122页

作者：黄建军刘正之梁荣庆 D.Teuner 深圳大学理学院广东深圳518060 中国科学院等离子体物理研究所安徽合肥2300313 德国鲁尔大学电子工程与信息技术系德国波鸿d44780

通过对射频 (rF)放电电压电流以及其相位角的精确测定 ,结合射频放电的物理模型与等效电路 ,对金属铜和金电极he气中的射频放电进行实验研究 ,得出射频放电溅射型铜和金离子等离子体电阻、容抗、鞘层厚度与电流密度的关系 ;在Goydak模... 详细信息

通过对射频 (rF)放电电压电流以及其相位角的精确测定 ,结合射频放电的物理模型与等效电路 ,对金属铜和金电极he气中的射频放电进行实验研究 ,得出射频放电溅射型铜和金离子等离子体电阻、容抗、鞘层厚度与电流密度的关系 ;在Goydak模型的基础上计算出电子密度 ,得出电子密度与气体压强、放电电流密度之间的实验曲线 ,并对两电极进行了比较。

关键词：等离子体物理学金属离子激光器射频溅射 Goydak模型电子密度

Tailoring microstructures of CoCrFeNiNb_(0.25)hypoeutectic high-entropy alloy by hot deformation

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rare Metals 2022年第6期41卷 2028-2037页

作者： Xiao-rong Liu Feng {1. Jun-Jie Li Ying-Ying Dang zhi-Jun Wang Jin-C{1.ng Wang school of Materials scienceand engineering Northwestern Polytechnical UniversityXi'an710072China Thermal power research {1. Xi'an710054China

CoCrFeNiNb_(0.25)hypoeutectic high-entropy alloy(heA)has shown good {1. ***,due to interdendritic eutectics,it is challenging to further optimize the microstructure through cold rolling and *** current study showed that hot defor-mation effectively tailored the hypoeutectic *** investigated the hot deformation behavior and microstructure evolution of the dual-phase CoCrFe-NiNb_(0.25) heA at different temperatures from 800 to 1.00℃and different strain rates from 0.01.to 1..00 s^(-1..The systematic investigation showed the deformation activation energy around 500 kJ·mol^(-1..Microstructure with refined grains and uniformly distributed Laves phases can be obtained after 70%compression at 900℃with a strain rate of 0.01.s^(-1..

关键词： Hot deformation High-entropy alloy Microstructure evolution