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| 1 | Weldability, microstructure and mechanical properties of laser-welded selective laser melted 304 stainless steel joints显示文摘Laser welding is a promising process for joining small components produced by selective laser melting (SLM) to fabricate the large-scale and complex-shaped parts. In the work, the morphology, microstructure, microhardness, tensile properties and corrosion resistance of the laser welded stress-relieved SLMed 304 stainless steel joints are investigated, as the different sections of stress-relieved SLMed 304 stainless steel are joined. Results show that the SLMed 304 stainless steel plates have a good laser weldability. The microstructure of laser-welded joints consists of the cellular dendrites in austenite matrix within columnar grains, exhibiting a coarser dendrite structure, lower microhardness (~220HV) and tensile properties (tensile strength of ~750 MPa, and area reduction of ~27.6%), but superior corrosion resistance to those of SLMed plates. The dendrite arm spacing of the joints varies from ~3.7μm in center zone, to ~5.0 (xm in fusion zone, to ~2.5 in epitaxial zone. The SLMed anisotropy shows a negligible effect on the microstructure and performance of the laser-welded joints. The laser welding along the building directions of the SLMed base plates can induce a slightly finer dendritic structure and higher tensile properties. | Jingjing Yang Yun Wang Fangzhi Li Wenpu Huang Guanyi Jing Zemin Wang Xiaoyan Zeng | 2019 | Journal of Materials Science & Technology2019，35，9： | 14 |
| 2 | SCATTERING FAR FIELD SOLUTION OF SH-WAVE BY MOVABLE RIGID CYLINDRICAL INTERFACE INCLUSION显示文摘The Green’s function is used to solve the scattering far field solution of SH-wave by a mov-able rigid cylindrical interface inclusion in a linear elastic body.First,a suitable Green’s function is devel-oped,which is the fundamental displacement solution of an elastic half space with a movable rigid half-cylin-drical inclusion impacted by out-of-plane harmonic line source loaded at any point of its horizontal surface.By using the Green’s function,a series of Fredholm integral equations of the first kind which determine thescattering far field can be set up.Then the paper gives the expressions on the far field including the displace-ment mode of scattering wave and the solution of scattering cross-section.Finally,some examples and nu-merical results are discussed to analyze the influence of the combination of different media parameters on theanswer of far field. | Yang Zailin Liu Diankui Shi Wenpu | 2002 | Acta Mechanica Solida Sinica2002，15，3： | 12 |
| 3 | Mechanical property and permeability of raw coal containing methane under unloading confining pressure显示文摘Based on domestic-developed triaxial servo-controlled seepage equipment for thermal-hydrologicalmechanical coupling of coal containing methane,an experimental study was carried out to investigate mechanical property and gas permeability of raw coal,under the situation of conventional triaxial compression and unloading confining pressure tests in different gas pressure conditions.Triaxial unloading confining pressure process was reducing confining pressure while increasing axial pressure.The research results show that,compared with the peak intensity of conventional triaxial loading,the ultimate strength of coal samples of triaxial unloading confining pressure was lower,deformation under loading was far less than unloading,dilation caused by unloading was more obvious than loading.The change trend of volumetric strain would embody change of gas permeability of coal,the permeability first reduced along with volumetric strain increase,and then raised with volume strain decrease,furthermore,the change trends of permeability of coal before and after destruction were different in the stage of decreasing volume strain due to the effect of gas pressure.When gas pressure was greater,the effective confining pressure was smaller,and the radial deformation produced by unloading was greater.When the unloading failed confining pressure difference was smaller,coal would be easier to get unstable failure. | Yin Guangzhi Li Wenpu Jiang Changbao Li Minghui Li Xing Liu Hairu Zhang Qiangui | 2013 | International Journal of Mining Science and Technology2013，23，6： | 9 |
| 4 | Numerical simulation of gas migration into mining-induced fracture network in the goaf显示文摘Gas extraction practice has been proven for the clear majority of coal mines in China to be unfavorable using drill holes in the coal seam. Rather, mining-induced fractures in the goaf should be utilized for gas extraction. To study gas migration in mining-induced fractures, one mining face of 10 th Mine in Pingdingshan Coalmine Group in Henan, China, has been selected as the case study for this work. By establishing the mathematical model of gas migration under the influence of coal seam mining, discrete element software UDEC and Multiphysics software COMSOL are employed to model gas migration in mining-induced fractures above the goaf. The results show that as the working face advances, the goaf overburden gradually forms a mining-induced fracture network in the shape of a trapezoid, the size of which increases with the distance of coal face advance. Compared with gas migration in the overburden matrix, the gas flow in the fracture network due to mining is far greater. The largest mining-induced fracture is located at the upper end of the trapezoidal zone, which results in the largest gas flux in the network. When drilling for gas extraction in a mining-induced fracture field, the gas concentration is reduced in the whole region during the process of gas drainage, and the rate of gas concentration drops faster in the fractured zone. It is shown that with gas drainage, the gas flow velocity in the mininginduced fracture network is faster. | Cao Jie Li Wenpu | 2017 | International Journal of Mining Science and Technology2017，27，4： | 7 |
| 5 | Microstructural evolution and mechanical properties of 300M steel produced by low and high power selective laser melting显示文摘300 M ultra-high strength steel has been widely used in critical structural components for aviation and aerospace vehicles,owing to its high strength,excellent transverse plasticity,fracture toughness and fatigue resistance.Herein,low and high power selective laser melting(SLM)of 300 M steel and their microstructural evolution and mechanical properties have been reported.The results show that the optimal energy density range with the highest relative density for SLMed 300 M steel is between 60 and160 J/mm^3.Furthermore,molten pools for deposition exhibit a conduction mode with semi-elliptical shape at a lower laser power of 300~600 W but a keyhole mode with'U'shape at a higher laser power of 800~1900 W.The heterogeneous microstructure of as-built samples is cha racterized by a skin-core structure which is that tempered troostite with the coarse non-equiaxed grains in the molten pool is wrapped by tempered sorbite with the fine equiaxed grains in the heat-affected zone.The skin-core structure of SLMed 300 M steel has the characteristics of hard inside and soft outside.The average microhardness of samples varies from 385 to 341 HV when laser power increases from 300 to 1900 W.Interestingly,ultimate tensile strength(1156-1193 MPa)and yield tensile strength(1085-1145 MPa)of dense samples fabricated at diffe rent laser powers vary marginally.But,the elongation(6.8-9.1%)of SLMed 300 M steel is greatly affected by the laser power. | Guanyi Jing Wenpu Huang Huihui Yang Zemin Wang | 2020 | Journal of Materials Science & Technology2020，47，13： | 5 |
| 6 | The Carboniferous at the Northern Foot of the Dabie Mountains and Its Tectonic Implications显示文摘In the Qinling orogenic belt. oceanic crust originated in the Early Palaeozoic. while the product of conti-nental collision appeared as late as after the Triassic. The Late Palaeozoic records there are of major impor-tance for understanding the tectonic regime at that time. The Carboniferous and even Permian sequences andthe distribution of sedimentary facies in northern Huaiyang indicate that the rocks were formed in a large basinopening towards the south. Regional stratigraphic correlation shows that the interior of the Qinling orogenicbelt was a sea trough lying between the Yangtze and North China plates in the middle part of the LatePalaeozoic. With subsequent northward migration of the South China Sea, the two seas were connected witheach other. Both the melanges and the Dabie block ia the eastern sector of the Qinling belt were formed in theMesozoic ?. | Ma Wenpu China University of Geosciences, Beijing Fei Zhenbi | 1991 | Acta Geologica Sinica(English Edition)1991，65，3： | 4 |
| 7 | Mechanism of calcium lignosulfonate in apatite and dolomite flotation system显示文摘Since the physical and chemical properties of apatite and dolomite can be similar,the separation of these two minerals is difficult.Therefore,when performing this separation using the flotation method,it is necessary to search for selective depressants.An experimental research was performed on the separation behavior of apatite and dolomite using calcium lignosulfonate as a depressant,and the mechanism by which this occurs was analyzed.The results show that calcium lignosulfonate has a depressant effect on both apatite and dolomite,but the depressant effect on dolomite is stronger at the same dosage.Mechanism analysis shows that the adsorptive capacity of calcium lignosulfonate on dolomite is higher than that of apatite,which is due to the strong reaction between calcium lignosulfonate and the Ca sites on dolomite.In addition,there is a hydrogen bond between calcium lignosulfonate and dolomite,which further prevents the adsorption of sodium oleate to dolomite,thus greatly inhibiting the flotation of dolomite. | Bo Feng Liangzhu Zhang Wenpu Zhang Huihui Wang Zhiyong Gao | 2022 | International Journal of Minerals,Metallurgy and Materials2022，29，9： | 2 |
| 8 | Development and Application of Oil-Spill Risk Assessment Model for Offshore Pipeline显示文摘To the potential oil-spill risk caused by offshore pipeline more attention has been paid after the Dalian oil spill incident from oil-pipeline explosion. Since then an issue about how to prevent and control the sudden oil-spill from the offshore pipeline has been raised. In this paper, we proposed an optimized model to analyze the main causes(probability) of spill and the consequence with the fuzzy comprehensive assessment model. Considering the complicated assessment process for oil-spill, the assessment factor system involving the spill probability and consequence was established based on the operative manual and statistic leakage/damage data of offshore pipeline in order to estimate the integrated spill risk score automatically. The evaluated factors of spill probability could be grouped into five aspects: corrosion, fatigue, national damage, third party, and operational fault; the consequence evaluated factors of spill included hazard of oil and impact-controlling capability. With some modifications based on experts' opinions, each of the evaluated factors in our work was developed with a relative weight and evaluation criterion. A test example for an offshore pipeline in the Bohai waters was described to show how the model can be used for an actual case in more detail. By using the oil-spill risk assessment model, it is easy to determine the risk level associated with the ongoing activity and management level and hence to take the risk mitigation action immediately. | LU Yan WANG Jia WEI Wenpu YANG Yong AN Wei | 2014 | Journal of Ocean University of China2014，13，3： | 2 |
| 9 | Trapping and diffusion behaviors of helium at vacancy in iron from first principles显示文摘We investigate the structure,trapping,and diffusion behaviors of helium(He) at vacancy in a Fe single crystal using first-principles simulations.Vacancy with more space can provide the lower electron density region for He binding in comparison with intrinsic Fe,causing He to diffuse into the vacancy inner easily.We provide the quantitative microscopic studies related to the atomic-level thermo-kinetic trapping processes.Moreover,such physical viewpoint can be applied to other vacancy-like defects such as vacancy clusters,void and grain boundaries which can open a space with reduced electron density region to increase He binding in metals and metal alloys. | LIU YueLin SHI WenPu | 2013 | Science China(Physics,Mechanics & Astronomy)2013，56，6： | 1 |
| 10 | Peptidylarginine deiminase inhibition disrupts NET formation and protects against kidney, skin and vascular disease in lupus-prone MRL/ lpr mice显示文摘 | Knight Jason S Subramanian Venkataraman O’Dell Alexander A Yalavarthi Srilakshmi Zhao Wenpu Smith Carolyne K Hodgin Jeffrey B Thompson Paul R Kaplan Mariana J | 2015 | Annals of the Rheumatic Diseases2015，，： | 1 |
| 11 | Peptidylarginine Deiminase Inhibition Reduces Vascular Damage and Modulates Innate Immune Responses in Murine Models of Atherosclerosis显示文摘 | Jason S. Knight Wei Luo Alexander A. O’Dell Srilakshmi Yalavarthi Wenpu Zhao Venkataraman Subramanian Chiao Guo Robert C. Grenn Paul R. Thompson Daniel T. Eitzman Mariana J. Kaplan | 2014 | Circulation Research2014，，： | 1 |
| 12 | The Peroxisome Proliferator -Activated Receptor Agonist Pioglitazone Improves Cardiometabolic Risk and Renal Inflammation in Murine Lupus显示文摘 | Wenpu Zhao Seth G Jeffrey B | 2009 | The Journal of Immunology2009，183，： | 1 |
| 13 | Peptidylarginine deiminase inhibition is immunomodulatory and vasculoprotective in murine lupus显示文摘 | Knight Jason S Zhao Wenpu Luo Wei Subramanian Venkataraman O’Dell Alexander A Yalavarthi Srilakshmi Hodgin Jeffrey B Eitzman Daniel T Thompson Paul R Kaplan Mariana J | 2013 | Journal of Clinical Investigation2013，，： | 1 |
| 14 | Phenylpropanoid glycoside inhibition of pepsin, trypsin and α-chymotrypsin enzyme activity in Kudingcha leaves from Ligustrum purpurascens显示文摘 | Xuli Wu WenPu Wang Tian Zhu Ting Liang FangQi Lu Weiyi He Haiping Zhang Zhigang Liu ShaoHeng He Kaiping Gao Zhendan He | 2013 | Food Research International2013，，2： | 1 |
| 15 | TEM study of the microstructure of HSLA100 Steel 显示文摘 | Dong Wenpu Fu Zuobao Yang Lang | 1996 | Materials Characterization1996，37，： | 1 |
| 16 | An Experimental Study on the Effects of Water Content on Coalbed Gas Permeability in Ground Stress Fields显示文摘 | Guangzhi Yin Changbao Jiang Jiang Xu Lisha Guo Shoujian Peng Wenpu Li | 2012 | Transport in Porous Media2012，，1： | 1 |
| 17 | Controllable in-situ aging during selective laser melting: Stepwise precipitation of multiple strengthening phases in Inconel 718 alloy显示文摘controllable in-situ aging treatment of Inconel 718 alloy was successfully developed by governing the types and times of the thermal cycles during selective laser melting (SLM). The sequential precipitation of γ' composite phase of primary/secondary y ' coated by a γ″shell, and γ″ occurs as the times of vertical thermal cycles increase when laser peak temperature (Ip) is between the precipitation temperature of strengthening phase {TpTe) and liquid temperature (7l ), which causes an increase in microhardness by 4 0 HV. Also, short-term aging mechanisms on three types of strengthening phases are proposed based on a great number of vacancies in the matrix. | Huihui Yang Jingjing Yang Wenpu Huang Guanyi Jing Zemin Wang Xiaoyan Zeng | 2019 | Journal of Materials Science & Technology2019，35，9： | 1 |
| 18 | Up-regulation of Thioredoxin 1 by aerobic exercise training attenuates endoplasmic reticulum stress and cardiomyocyte apoptosis following myocardial infarction显示文摘Exercise training(ET)has been reported to reduce oxidative stress and endoplasmic reticulum(ER)stress in the heart following myocardial infarction(MI).Thioredoxin 1(Trx1)plays a protective role in the infarcted heart.However,whether Trx1 regulates ER stress of the infarcted heart and participates in ET-induced cardiac protective effects are still not well known.In this work,H9c2 cells were treated with hydrogen peroxide(H_(2)O_(2))and recombinant human Trx1 protein(TXN),meanwhile,adult male C57B6L mice were used to establish the MI model,and subjected to a six-week aerobic exercise training(AET)with or without the injection of Trx1 inhibitor,PX-12.Results showed that H_(2)O_(2)significantly increased reactive oxygen species(ROS)level and the expression of TXNIP,CHOP and cleaved caspase12,induced cell apoptosis;TXN intervention reduced ROS level and the expression of CHOP and cleaved caspase12,and inhibited cell apoptosis in H_(2)O_(2)-treated H9c2 cells.Furthermore,AET up-regulated endogenous Trx1 protein expression and down-regulated TXNIP expression,restored ROS level and the expression of ER stress-related proteins,inhibited cell apoptosis as well as improved cardiac fibrosis and heart function in mice after MI.PX-12 partly inhibited the AET-induced beneficial effects in the infarcted heart.This study demonstrates that Trx1 attenuates ER stress-induced cell apoptosis,and AET reduces MI-induced ROS overproduction,ER stress and cell apoptosis partly through up-regulating of Trx1 expression in mice with MI. | Mengxin Cai Zujie Xu Wenyan Bo Fangnan Wu Wenpu Qi Zhenjun Tian | 2020 | Sports Medicine and Health Science2020，2，3： | 1 |
| 19 | Investigation of the Interaction Between(-)-Epigallocatechin-3-Gallate with Trypsin andα-Chymotrypsin显示文摘 | WU Xuli HE Weiyi WANG Wenpu | 2013 | International Journal of Food Science&Technology2013，48，11： | 1 |
| 20 | Ultrafast Hole Deformation Revealed by Molecular Attosecond Interferometry显示文摘Understanding the evolution of molecular electronic structures is the key to explore and control photochemical reactions and photobiological processes.Subjected to strong laser fields,electronic holes are formed upon ionization and evolve in the attosecond timescale.It is crucial to probe the electronic dynamics in real time with attosecond-temporal and atomic-spatial precision.Here,we present molecular attosecond interferometry that enables the in situ manipulation of holes in carbon dioxide molecules via the interferometry of the phase-locked electrons(propagating in opposite directions)of a laser-triggered rotational wave packet.The joint measurement on high-harmonic and terahertz spectroscopy(HATS)provides a unique tool for understanding electron dynamics from picoseconds to attoseconds.The optimum phases of two-color pulses for controlling the electron wave packet are precisely determined owing to the robust reference provided with the terahertz pulse generation.It is noteworthy that the contribution of HOMO-1 and HOMO-2 increases reflecting the deformation of the hole as the harmonic order increases.Our method can be applied to study hole dynamics of complex molecules and electron correlations during the strong-field process.The threefold control through molecular alignment,laser polarization,and the two-color pulse phase delay allows the precise manipulation of the transient hole paving the way for new advances in attochemistry. | Yindong Huang Jing Zhao Zheng Shu Yalei Zhu Jinlei Liu Wenpu Dong Xiaowei Wang Zhihui Lü Dongwen Zhang Jianmin Yuan Jing Chen Zengxiu Zhao | 2021 | Ultrafast Science2021，，1： | 1 |
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