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Superplasticity of fine-grained Mg-10Li alloy prepared by severe plastic deformation and understanding its deformation mechanisms

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journal of Magnesium and Alloys 2024年第1期12卷 316-331页

作者： h.T.jeong S.W.lee W.j.Kim Department of Materials Science and Engineering Hongik UniversityMapo-guSangsu-dong 72-1Seoul 121-791Republic of Korea

The superplastic behavior and associated deformation mechanisms of a fine-grained Mg-10.1 Li-0.8Al-0.6Zn alloy(LAZ1011)with a grain size of 3.2μm,primarily composed of the BCCβphase and a small amount of the hCPαphase,were examined in a temperature range of 473 K to 623 *** microstructural refinement of this alloy was achieved by employing high-ratio differential speed *** best superplasticity was achieved at 523 K and at strain rates of 10^(-4)-5×10^(-4)s^(-1),where tensile elongations of 550±600%were *** the heating and holding stage of the tensile samples prior to tensile loading,a significant increase in grain size was observed at temperatures above 573 ***,it was important to consider this effect when analyzing and understanding the superplastic deformation behavior and *** the investigated strain rate range,the superplastic flow at low strain rates was governed by lattice diffusion-controlled grain boundary sliding,while at high strain rates,lattice diffusion-controlled dislocation climb creep was the rate-controlling deformation *** was concluded that solute drag creep is unlikely to *** the late stages of deformation at 523 K,it was observed that grain boundary sliding led to the agglomeration of theαphase,resulting in significant strain *** mechanism maps were constructed forβ-Mg-Li alloys in the form of 2D and 3D formats as a function of strain rate,stress,temperature,and grain size,using the constitutive equations for various deformation mechanisms derived based on the data of the current tests.

关键词： Magnesium-lithium alloy Superplasticity Severe plastic deformation Grain size Grain growth

Simultaneous Analysis of trace anions and cations in the secondary circuit of a Pressurized Water Reactor（PWR） and PhWR （Pressurized heavy Water Reactor） using an automated Metrohm In-line Autocalibration and Preconcentration.

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Simultaneous Analysis of trace anions and cations in the sec...

high Performance of Blue Light-emitting Diodes Based on a New Blue Dopant

The 2nd China-japan-Korea joint Symposium on Ion Chromatography

作者： j.R.Kim B.Y.lee S.C.lee h.j.lee j L Science Co. Ltd.SeoulKorea j L Science Co. Ltd.SeoulKorea Korea hydro＆ Nuclear Power Co. LtdGoriKorea Korea hydro＆ Nuclear Power Co. LtdWolsungKorea

＜正＞The simultaneous determination of trace level of inorganic anions （F, Cl, NO3, PO4, SO4） and ppb level of organic anions （formic, glycolic and acetic acid） and sodium at sub-ug/L level and ammonium in ppm level of cation matrix which is ethanolamine or morpholine was done with Metrohm Advanced IC system using Dosino technique. The determination of anions and cations at very low trace levels in the secondary circuit of a nuclear power plant requires special procedures as requirements of the hot

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High Performance of Blue Light-emitting Diodes Based on a Ne...

Present Status of the KSTAR Superconducting Magnet System Development

2007亚洲显示国际会议

作者： j.h.Park j.h.Seo j.h.Kim h.j.lee K.h.lee S.S.Yoon Y.K.Kim Department of Information Display hongik University Seoul121-791Korea Center for Organic Materials and Information DevicesHongik UniversitySeoul121-791Korea Center for Organic Materials and Information Devices hongik University Seoul121-791Korea Department of Electronic EngineeringHongik UniversityHongik UniversitySeoul121-791Korea Deptartment of Chemistry Sungkyunkwan University Suwon440-746Korea

The characteristics of organic light-emitting diodes (OLEDs) using two kinds of hole transporting layers with various doping concentration of a new dopant material (Blue-1) were *** type of devices having various doping concentration (15 wt%,10 wt%,5 wt%) showed a different electroluminescent characteristics,which seemed to be due to the different hole mobility between the N,N′-diphenyl-N,N′-(2-napthyl)-(1,1′-phenyl)-4,4′-diamine (NPB) and the 4,4′,4″-Tris(N-(2-naphthyl)-N-phenyl-amino)-triphenylamine(2-TNATA).

关键词： Blue Light-emitting Diodes hole-only Devices OLEDs

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Plasma Science and Technology 2004年第5期6卷 2445-2450页

作者： Keeman Kim h.K.Park K.R.Park B.S.Lim S.I.lee M.K.Kim Y.Chu W.h.Chung S.h.Baek j.Y.Cho h.Yonekawa A.Chertovskikh Y.B.Chang j.S.Kim C.S.Kim D.j.Kim N.h.Song K.P.Kim Y.j.Song I.S.Woo W.S.han D.K.lee Y.K.Oh K.W.Cho j.S.Park G.S.lee h.j.lee T.K.Ko S.j.lee National NationalNationalNationalNationalNationalNationalNationalNationalNationalNationalNationalNationalNationalNationalNationalNationalNationalNationalNationalNationalNationalNationalNationalNationalNationalKorea Atomic Energy Research InstituteDaejeonRepublic of KoreaYonsei UniversitySeoulRepublic of KoreaYonsei UniversitySeoulRepublic of Korea Fusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science

The mission of Korea Superconducting Tokamak Advanced Research (KSTAR)project is to develop an advanced steady-state superconducting tokamak for establishing a scientificand technological basis for an attractive fusion reactor. Because one of the KSTAR mission is toachieve a steady-state operation, the use of superconducting coils is an obvious choice for themagnet system. The KSTAR superconducting magnet system consists of 16 Toroidal Field (TF) coils and14 Poloidal Field (PF) coils. Internally-cooled Cable-In-Conduit Conductors (CICC) are put into usein both the TF and PF coil systems. The TF coil system provides a field of 3.5 T at the plasmacenter and the PF coil system is able to provide a flux swing of 17 V-sec. The major achievement inKSTAR magnet-system development includes the development of CICC, the development of a full-size TFmodel coil, the development of a coil system for background magnetic-field generation , theconstruction of a large-scale superconducting magnet and CICC test facility. TF and PF coils are inthe stage of fabrication to pave the way for the scheduled completion of KSTAR by the end of 2006.

关键词： superconducting magnet KSTAR CICC

Characteristics of Organic Thin-film Transistors with the Synthesized Photo-reactive Polymeric Gate Insulator

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Characteristics of Organic Thin-film Transistors with the Sy...

The quasi-Gramian solution of a non-commutative extension of the higher-order nonlinear Schr?dinger equation

2007亚洲显示国际会议

作者： K.W.Bong j.Park h.Kim h.M.Kim h.j.lee j.S.Choi Dept.of Electrical Information ＆ Control Engineering Hongik University 72-1Sangsu-dongMapo-gu P-419SeoulKorea121-791 Dept.of Electrical Information ＆ Control Engineering Hongik University 72-1Sangsu-dongMapo-gu P-419SeoulKorea121-791 Dept.of Electrical Information ＆ Control Engineering Hongik University 72-1Sangsu-dongMapo-gu P-419SeoulKorea121-791 Dept.of Electrical Information ＆ Control Engineering Hongik University 72-1Sangsu-dongMapo-gu P-419SeoulKorea121-791 Dept.of Electrical Information ＆ Control Engineering Hongik University 72-1Sangsu-dongMapo-gu P-419SeoulKorea121-791

＜正＞In this study,the photo-reactive polymeric gate insulator was synthesized and the electrical characteristics of organic thin film transistors（OTFFs）according to the UV-exposure direction onto the gate insulator were *** photo-re- active polymer was prepared by substituting hydroxyl group in Poly（4-vinylphenol）（PVP）with cinnamoyl *** UV-exposure treatment can modify the interface properties between semiconductor and polymer gate dielectric,there by in- fluencing the electrical characteristics of *** results show that the polarization direction of the photo-reactive in- sulator can affect the device performance.

关键词： Organic Thin Film Transistors Photo-align Pentacene Surface Treatment

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Communications in Theoretical Physics 2024年第3期76卷 51-61页

作者： h W A Riaz j Lin Department of Physics Zhejiang Normal UniversityJinhua 321004China

The nonlinear Schr?dinger(NLS)equation,which incorporates higher-order dispersive terms,is widely employed in the theoretical analysis of various physical *** this study,we explore the non-commutative extension of the higher-order NLS *** treat real or complex-valued functions,such as g_(1)=g_(1)(x,t)and g_(2)=g_(2)(x,t)as non-commutative,and employ the Lax pair associated with the evolution equation,as in the commutation *** derive the quasi-Gramian solution of the system by employing a binary Darboux *** soliton solutions are presented explicitly within the framework of *** visually understand the dynamics and solutions in the given example,we also provide simulations illustrating the associated ***,the solution can be used to study the stability of plane waves and to understand the generation of periodic patterns within the context of modulational instability.

关键词： integrable systems Darboux transformation solitons

比较基于动脉方法的低剂量胸部CT冠状动脉钙化的分级

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国际医学放射学杂志 2022年第1期 115-115页

作者： S.lee Y.j.Suh K.Nam K.lee h.j.lee B.W.Choi 于静

摘要目的确定非心电（ECG）门控的低剂量胸部CT(LDCT)上基于动脉的3种方法中判定冠状动脉钙化（CAC）等级的最佳方法。方法回顾性纳入同一天接受了LDCT和

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