|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Oxide dispersion strengthened stainless steel 316L with superior strength and ductility by selective laser melting显示文摘Dense oxide dispersion strengthened(ODS) 316 L steels with different amount of Y2O3 additions were succe s s fully fabricated by selective laser melting(SLM) even though part of the added Y2O3 got lost during the process.The microstructure was characterized in details and the mechanical properties were tested at room temperature,250℃ and 400℃,respectively.The effect of the scanning speed on agglomeration of nanoparticles during SLM process was discussed.Superior properties,e.g.,yield strength of 574 MPa and elongation of 91%,were achieved at room temperature in SLM ODS 316 L with additional 1% of Y2 O3.At elevated temperature s,the strength kept high but the elongations dropped dra matically.It was observed that nano-voids nucleated throughout the whole gauge section at the sites where nanoinclusions located.The growth and coalescence of these voids were suppre s sed by the formation of an element segregation network before necking,which relieved local stress concentration and thus delayed necking.This unusual necking behavior was studied and compared to the previous theory.It appeared that the strong convection presented in the melt pool can evenly redistribute the short-time milled coarse Y2O3 precursor powder during SLM process.These findings can not only solve the problems encountered during the fabrication of ODS components but also replenish the strengthening mechanism of SLM 316 L thus pave a way for further improving of mechanical properties. | Yuan Zhong Leifeng Liu Ji Zou Xiaodong Li Daqing Cui Zhijian Shen | 2020 | Journal of Materials Science & Technology2020，42，7： | 5 |
| 2 | Mechanical properties and deformation mechanisms of a novel fine-grained Mg-Gd-Y-Ag-Zr-Ce alloy with high strength-ductility synergy显示文摘Grain boundary precipitation and segregation play an important role in determining mechanical properties of Mg alloys. In the present work, we studied work focuses on the strengthening and deformation mechanism of coarse-grained(CG) and fine-grained(FG) Mg-Gd-Y-Ag-Zr-Ce alloy. The CG alloy is strengthened by means of age-strengthening with the formation of both basal plate γ' and prismatic plate β’ precipitates in the grain interior. While the strengthening of FC alloy is completed by intergranular alloying segregation and intragranular precipitates γ' and β’. The segregation of alloying elements at the grain boundary and formation of sub-micron particles can stabilize the grain boundary and suppress the intergranular deformation. Consequently, dislocations could be trapped near γ' and β’ precipitates in the grain interior. Unlike CG alloys, the FG alloys exhibit a heterogeneous transition from elastic to plastic deformation via the Lüders plateau. The rapid gliding dislocation multiplications and fine-grained size are necessary and sufficient conditions for the Lüders strains. Our work provides the insights on the evolution of fine-grained microstructure and helps for the design of Mg alloys with good mechanical properties. | Xiaofei Cui Wei Fu Daqing Fang Guangli Bi Zijun Ren Shengwu Guo Suzhi Li Xiangdong Ding Jun Sun | 2021 | Journal of Materials Science & Technology2021，，7： | 1 |
| 3 | Reduction of pertechnetate in solution by heterogeneous electron transfer from Fe ( Ⅱ )- containing geological material显示文摘 | Daqing Cui Trygvee Eriksen | 1996 | Environ Sci Technol1996，30，7： | 1 |
| 4 | PERTURBATION SOLUTION OF SECONDARY FLOW OF POWER-LAW FLUID IN HELICAL PIPES WITH CIRCULAR CROSS-SECTION显示文摘In terms of tensor analysis technique, the Navier-Stokes equations in helical coordinate system were derived. A steady incompressible flow of power-law fluid in helical pipes at low Reynolds number was investigated by the perturbation method. A second order solution of secondary flow was worked out. The secondary flow characteristics in helical pipes are analyzed. The effects of the number Dn, curvature and torsion on the secondary flow at different flow parameters were discussed. The results show that the secondary flow pattern changes from a single vortex to two vortices as the number Dn increases at a given curvature and a given torsion. Because of the effect of torsion, the secondary flow pattern changes from two almost symmetrical vortices to a single vortex as the torsion of the helical pipe increases while the Reynolds number and curvature hold constant. The secondary flow pattern cannot be affected by the curvature of the helical pipe at a given Dn number. | Cui Hai-qing, Wang Ke-liang Department of Petroleum Engineering, Daqing Petroleum Institute, Anda 151400, China Wu Fu-bing Department of Navy and Ocean Engineering, Harbin Engineering University, Harbin 150001, China Zheng Xiao-song Department of Pet | 2001 | Journal of Hydrodynamics2001，13，4： | 1 |
| 5 | Development of TXRF Used for PM2.5 Sample Determination显示文摘TXRF instruments with Mo target and W target used for PM2.5 sample analysis were developed.The instruments include two important parts,the light path and software.Incident X-ray was totally reflected by designed and adjusted the light path.The instrument control | KANG Haiying ZHENG Weiming CUI Daqing XU Ping | 2017 | Annual Report of China Institute of Atomic Energy2017，，1： | 0 |
| 6 | Development of LIPS Prototype to Monitor Trace Element of Particle Mater in Air Aerosols显示文摘The laser induced plasma spectroscopy(LIPS)has a potential application to detect trace element from environmental medium without sampling and pretreatments.The prototype of enhanced LIPS has been set up to demonstrate the high sensitive detection of trace elements at ppb level,i.e.several microgram per cubic meters dry air. | GAO Zhixing LI Jing HU Fengming CUI Daqing LIU Xiaolin | 2018 | 中国原子能科学研究院年报2018，，1： | 0 |
| 7 | Sleep deprivation reorganizes the dynamic configurations of default mode network activity during recovery sleep显示文摘Sleep deprivation causes disturbances of the neural activity, leading to the impairment of brain functions. However, the exact mechanism of sleep deprivation and how it affects the dynamics of brain activity during the recovery sleep remains unclear. In the current study, we performed sleep deprivation experiments on ten adult rats, and recorded the local field potentials from default mode network(DMN) regions during sleep before and after sleep deprivation. The DMN dynamics was assessed with the configurations of coactive micropatterns(CAMPs) using our previously proposed CAMP method. Our analysis revealed that the effects of sleep deprivation on DMN dynamics in the slow-wave sleep(SWS) state and the rapid eye-movement sleep(REM)state were disparate. Dynamic configurations of DMN activity in the SWS state were significantly impaired after sleep deprivation, with increased occurrence of low-activity CAMP and reorganized transition structure across three CAMPs. Moreover,enhanced functional connectivity and improved efficiencies in all CAMP networks were observed during the SWS state in the recovery sleep. However, there were no significant alterations in either DMN dynamics or CAMP network structures in the REM sleep state after sleep deprivation. Our results described the alterations of DMN dynamics in different sleep states after sleep deprivation, and illustrated the differential effects of sleep deprivation on two sleep states. These findings demonstrated the underlying neural mechanisms of the effects of sleep deprivation on DMN activity during sleep and increased our understanding of the physiological roles of the DMN in maintain sleep homeostasis after sleep deprivation. | CUI Yan WU ShengDun ZHAO Shi LONG TianYao JIAN ZhaoXin YU Shuang ZHANG Ge BISWAL Bharat GUO DaQing XIA Yang YAO DeZhong | 2022 | Science China(Technological Sciences)2022，65，7： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员