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| 1 | Mechanical properties and corrosion behavior of selective laser melted 316L stainless steel after different heat treatment processes显示文摘Irregular grains, high interfacial stresses and anisotropic properties widely exist in 3D-printed metallic materials, and this paper investigated the effects of heat treatment on the microstructural, mechanical and corrosion properties of 316 L stainless steel fabricated by selective laser melting. Sub-grains and low-angle boundaries exist in the as-received selective laser melted(SLMed) 316 L stainless steel. After heat treatment at 1050℃, the sub-grains and low-angle boundaries changed slightly, and the stress state and strength decreased to some extent due to the decrease of dislocation density. After heat treatment at 1200℃, the grains became uniform, and the dislocation cells vanished, which led to a sharp decline in the hardness and strength. However, the ductility was improved after recrystallization heat treatment.The passive film thickness and corrosion potential of the SLMed 316 L stainless steel decreased after heat treatment, and the pitting potential also decreased due to the accelerated transition from metastable to steady-state pitting;this accelerated transition was caused by the presence of weak passive films at the enlarged pores after heat treatment, especially for an adequate solid solution treatment. | Decheng Kong Chaofang Dong Xiaoqing Ni Liang Zhang Jizheng Yao Cheng Man Xuequn Cheng Kui Xiao Xiaogang Li | 2019 | Journal of Materials Science & Technology2019，35，7： | 23 |
| 2 | Understanding environmental impacts on initial atmospheric corrosion based on corrosion monitoring sensors显示文摘Atmospheric corrosion monitoring(ACM)sensors were employed to study the initial atmospheric corrosion of carbon steels over a one-month period in six outdoor dynamic atmospheric environments in China.Based on the~250,000 corrosion data sets collected,the environmental impacts of relative humidity,temperature and rainfall on the initial corrosion behavior of carbon steels were investigated.The results showed that rainfall was the strongest environmental factor influencing the initial atmospheric corrosion rate.Relative humidity significantly influenced the corrosion of carbon steels in low-precipitation environments and non-rainfall period. | Zibo Pei Xuequn Cheng Xiaojia Yang Qing Li Chenhan Xia Dawei Zhang Xiaogang Li | 2021 | Journal of Materials Science & Technology2021，，5： | 12 |
| 3 | A new understanding of the effect of Cr on the corrosion resistance evolution of weathering steel based on big data technology显示文摘In this work,we studied the effect of Cr element on the corrosion resistance evolution of weathering steel based on corrosion big data technology.It suggested that corrosion big data technology is suitable for evaluation of the effect of microalloying Cr element on the corrosion evolution behavior of weathering steel.New understandings prove that the effect of Cr on the corrosion process is dynamic rather than static,the processes is affected by both of the environmental factors and the electrochemical or chemical reactions in the rust layer.Besides,Cr element has both beneficial effect and detrimental effect on the corrosion resistance of weathering steel.The beneficial effect is that the general corrosion resistance of Cr-additional steel is better than that of Cr-free steel,while the detrimental effect is that localized corrosion is intensified as the increase of Cr content in the Cr-additional steel. | Xiaojia Yang Ying Yang Meihui Sun Jinghuan Jia Xuequn Cheng Zibo Pei Qing Li Di Xu Kui Xiao Xiaogang Li | 2022 | Journal of Materials Science & Technology2022，，9： | 12 |
| 4 | Properties of passive film formed on 316L/2205 stainless steel by Mott-Schottky theory and constant current polarization method显示文摘Semiconductor properties of the passive films formed on 316L and 2205 stainless steel were studied by Electrochemical Impedance Spectroscopy(EIS) in the high-temperature acetic acid.The results showed that the corrosion resistance of 2205 was higher than that of 316L,and the passive films formed on 316L and 2205 stainless steel showed p-type and n-type semiconductor behavior,respectively.Destruction and self-repairing of passive films were studied by using the constant current polarization method.The results showed that for 316L,the self-repairing process would occur when the destruction was lower than the critical extent or it would not do;for 2205,the self-repairing process only happened in a short time when the destruction was in the same extent as 316L. | CHENG XueQun LI XiaoGang DU CuiWei | 2009 | Chinese Science Bulletin2009，54，13： | 11 |
| 5 | Corrosion Mechanism of Corrosion-Resistant Steel Developed for Bottom Plate of Cargo Oil Tanks显示文摘A new type of corrosion-resistant steel consisting of ferrite and bainite phases was developed for cargo oil tanks of crude oil tankers. The corrosion rate of this new steel was 0.22 mm/a, which was equivalent to ca. 1/5 of the criterion ( ≤ 1 mm/a) for corrosion-resistant steels. The composition and element distribution of the corrosion products were investigated by micro-Raman spectrometry and energy dispersive spectrometer. The results demonstrated that the corrosion product was composed of α-FeOOH, Fe3O4 and a continuous Cu enrichment layer. This kind of corrosion product was protective to the steel matrix and accounted for the enhancement of the corrosion resistance of the new developed steel. | Feilong SUN Xiaogang LI Fan ZHANG Xuequn CHENG Cheng ZHOU Nianchun WU Yuqun YIN Jinbin ZHAO | 2013 | Acta Metallurgica Sinica(English Letters)2013，26，3： | 9 |
| 6 | Interaction between austein-ferrite phases on passive performance of2205 duplex stainless steel显示文摘The passive behavior of 2205 duplex stainless steel(DSS) and its individual phases(α-phase, γ-phase) in neutral 3.5% NaCl solution was investigated by various electrochemical methods. The results indicated that galvanic effect between α and γ phases cannot deteriorate local corrosion, but favors the enhancement of the passive film. Under the galvanic effect, the diffusion of the dissolved passive cations would be promoted in a short distance between α and γ zones, leading to modifications of the chemical composition and semiconductive property of the passive film and therefore the enhancement of the corrosion resistance of DSS 2205. | Xuequn Cheng Yi Wang Xiaogang Li Chaofang Dong | 2018 | Journal of Materials Science & Technology2018，34，11： | 7 |
| 7 | Digoxin Ameliorates Glymphatic Transport and Cognitive Impairment in a Mouse Model of Chronic Cerebral Hypoperfusion显示文摘The glymphatic system plays a pivotal role in maintaining cerebral homeostasis.Chronic cerebral hypoperfusion,arising from small vessel disease or carotid stenosis,results in cerebrometabolic disturbances ultimately manifesting in white matter injury and cognitive dysfunction.However,whether the glymphatic system serves as a potential therapeutic target for white matter injury and cognitive decline during hypoperfusion remains unknown.Here,we established a mouse model of chronic cerebral hypoperfusion via bilateral common carotid artery stenosis.We found that the hypoperfusion model was associated with significant white matter injury and initial cognitive impairment in conjunction with impaired glym・phatic system function.The glymphatic dysfunction was associated with altered cerebral perfusion and loss of aquaporin 4 polarization.Treatment of digoxin rescued changes in glymphatic transport,white matter structure,and cognitive function.Suppression of glymphatic functions by treatment with the AQP4 inhibitor TGN-020 abolished this protective effect of digoxin from hypoperfusion injury.Our research yields new insight into the relationship between hemodynamics,glymphatic transport,white matter injury,and cognitive changes after chronic cerebral hypoperfusion. | Jie Cao Di Yao Rong Li Xuequn Guo Jiahuan Hao Minjie Xie Jia Li Dengji Pan Xiang Luo Zhiyuan Yu Minghuan Wang Wei Wang | 2022 | Neuroscience Bulletin2022，38，2： | 5 |
| 8 | Effect of Microstructures on Corrosion Behavior of Nickel Coatings:(Ⅱ) Competitive Effect of Grain Size and Twins Density on Corrosion Behavior显示文摘Nanocrystalline nickel coatings with grain size of 50 nm were annealed in vacuum at 200°C and 400°C for 10 min.Their microstructures were investigated by transmission electron microscopy(TEM).And their corrosion behaviors were studied by means of polarization and electrochemical impedance spectroscopy(EIS).The results showed that their grain size grew up to about 60 nm(200°C)and 500 nm(400°C),respectively.The specimen annealed at 200°C possessed higher density of twins in compared with the counterparts of as-deposited and annealed at 400°C.The normal grain size effect on the corrosion behavior was not observed.However,it was found that the corrosion resistance of the coating linearly changed with the density of twins. | Guozhe Meng Yang Li Yawei Shao Tao Zhang Yanqiu Wang Fuhui Wang Xuequn Cheng Chaofang Dong Xiaogang Li | 2016 | Journal of Materials Science & Technology2016，32，5： | 5 |
| 9 | A multi-institutional retrospective study of hyperthermic plus intravesical chemotherapy versus intravesical chemotherapy treatment alone in intermediate and high risk nonmuscle-invasive bladder cancer显示文摘Objective:To compare the efficacy and safety of hyperthermic intravesical chemotherapy(HIVEC)and intravesical chemotherapy(IVEC)in patients with intermediate and high risk nonmuscle-invasive bladder cancer(NMIBC)after transurethral resection.Methods:We included 560 patients diagnosed with primary or recurrent NMIBC between April 2009 and December 2015 at 1 of 6 tertiary centers.We matched 364 intermediate or high risk cases and divided them into 2 groups:the HIVEC+IVEC group[chemohyperthermia(CHT)composed of 3 consecutive sessions followed by intravesical instillation without hyperthermia]and the IVEC group(intravesical instillation without hyperthermia).The data were recorded in the database.The primary endpoint was 2-year recurrence-free survival(RFS)in all NMIBC patients(n=364),whereas the secondary endpoints were the assessment of radical cystectomy(RC)and 5-year overall survival(OS).Results:There was a significant difference in the 2-year RFS between the two groups in all patients(n=364;HIVEC+IVEC:82.42%vs.IVEC:74.18%,P=0.038).Compared with the IVEC group,the HIVEC+IVEC group had a lower incidence of RC(P=0.0274).However,the 5-year OS was the same between the 2 groups(P=0.1434).Adverse events(AEs)occurred in 32.7%of all patients,but none of the events was serious(grades 3–4).No difference in the incidence or severity of AEs between each treatment modality was observed.Conclusions:This retrospective study showed that HIVEC+IVEC had a higher 2-year RFS and a lower incidence of RC than IVEC therapy in intermediate and high risk NMIBC patients.Both treatments were well-tolerated in a similar manner. | Qiang Ruan Degang Ding Bin Wang Chaohong He Xuequn Ren Zhenhua Feng Zhigang Pang Jin Wang Xiangliang Zhang Hongsheng Tang Jiahong Wang Qingjun He Ziying Lei Quanxing Liao Jiali Luo Shuzhong Cui | 2021 | Cancer Biology & Medicine2021，18，1： | 4 |
| 10 | A model for coupling reservoir inflow and wellbore flow in fishbone wells显示文摘A coupling model is proposed in this paper by using the Green Function and Newman's product principle, and the solution method is provided here as well. This model can be used to describe the reservoir inflow and wellbore flow for fishbone wells in an unsteady flow or pseudo-steady flow state. A case study indicates that the bottom hole pressure declines quickly in the unsteady flow period which is very short. The pressure drop per unit time remains unchanged under the pseudo-steady flow conditions. The distribution of flow rate along the main wellbore shows a wave shape under the unsteady flow condition, and the flow rate distribution in each branch is similar. The flow rate distribution along the main wellbore is irregular 'U' shaped under the pseudo-steady flow condition, and the space-symmetrical branches have the same flow distribution pattern. In the initial production period, the flow rate increases significantly as the length of branches and the angle between branches and the main wellbore increase. As the production continues, the length and angle of branches have only a slight effect on the flow in fishbone wells. | Lian Peiqing Cheng Linsong Tan Xuequn Li Linlin | 2012 | Petroleum Science2012，9，3： | 4 |
| 11 | Effect of chloride ions on 316L stainless steel in cyclic cooling water显示文摘The effect of Cl- on the 316L stainless steel in simulated cooling water has been studied using polarization curves,electrochemical impedance spectroscopy (EIS),MottSchottky plot and scanning electron microscopy (SEM) techniques.Cl- concentrations vary from 200 to 900 mg/L.Results reveal that the corrosion resistance increases with the decrease of Cl-concentration in simulated cooling water.The increase of Cl- concentration leads to the shift of the corrosion potential towards the positive direction.Mott-Schottky curves show that in the passive film,Cr2O3 and FeO at the inner layer exhibit P-type but Fe2O3 and CrO3 (CrO42-) N-type semiconductive properties.The SEM/EDX data demonstrate that elements such as Fe,O,C,Si and Cl as well as the presence of calcium and aluminum are presented on the surface of the metal. | Zuojia LIU Xuequn CHENG Shengjie LU Xiaogang LI | 2010 | Acta Metallurgica Sinica(English Letters)2010，23，6： | 4 |
| 12 | TPGS/hyaluronic acid dual-functionalized PLGA nanoparticles delivered through dissolving microneedles for markedly improved chemo-photothermal combined therapy of superficial tumor显示文摘Nanoparticles(NPs)have shown potential in cancer therapy,while a single administration conferring a satisfactory outcome is still unavailable.To address this issue,the dissolving microneedles(DMNs)were developed to locally deliver functionalized NPs with combined chemotherapy and photothermal therapy(PTT).α-Tocopheryl polyethylene glycol succinate(TPGS)/hyaluronic acid(HA)dualfunctionalized PLGA NPs(HD10 NPs)were fabricated to co-load paclitaxel and indocyanine green.HD10 NPs significantly enhanced the cytotoxicity of low-dose paclitaxel because of active and mitochondrial targeting by HA and TPGS,respectively.PTT could further sensitize tumor cells toward chemotherapy by promoting apoptosis into the advanced period,highly activating caspase 3 enzyme,and significantly reducing the expression of survivin and MMP-9 proteins.Further,the anti-tumor effects of HD10 NPs delivered through different administration routes were conducted on the 4 T1 tumorbearing mice.After a single administration,HD10 NPs delivered with DMNs showed the best antitumor effect when giving chemotherapy alone.As expected,the anti-tumor effect was profoundly enhanced after combined therapy,and complete tumor ablation was achieved in the mice treated with DMNs and intra-tumor injection.Moreover,DMNs showed better safety due to moderate hyperthermia.Therefore,the DMNs along with combined chemo-photothermal therapy provide a viable treatment option for superficial tumors. | Tingting Peng Yao Huang Xiaoqian Feng Chune Zhu Shi Yin Xinyi Wang Xuequn Bai Xin Pan Chuanbin Wu | 2021 | Acta Pharmaceutica Sinica B2021，11，10： | 4 |
| 13 | Corrosion Resistance of 316L Stainless Steel in Acetic Acid by EIS and Mott-Schottky显示文摘The properties of the passivation film formed on 316L stainless steel were studied by Electrochemical Impedance Spectroscopy(EIS),Mott-Schottky and Voltammetry measurements in high- temperature acetic acid.The results show that the passivation film formed on 316L stainless steel is stable in 60% acetic acid solution from 25℃to 85℃.As temperature increased,the polarization resistance decreased but the interface capacitance increased.There was hardly any relation between temperature and the intrinsic property semiconductor.The passivation film represents the p-semiconductor property in the potential interval of-0.5-0.1 V;represents the n-semiconductor property in the potential interval of 0.1-0.9 V;and represents the p-semiconductor property in the potential interval of 0.9-1.1 V.The voltammetry measurements show that the structure of the passivation film is stable when the temperature is lower than 55℃ and that its stability decreased when this temperature is exceeded. | CHENG Xuequn LI Xiaogang YANG Lixia DU Cuiwei | 2008 | Journal of Wuhan University of Technology(Materials Science)2008，23，4： | 4 |
| 14 | Simultaneously Improving Mechanical Properties and Stress Corrosion Cracking Resistance of High-Strength Low-Alloy Steel via Finish Rolling within Non-recrystallization Temperature显示文摘The effect of hot rolling process on microstructure evolution,mechanical properties and stress corrosion cracking(SCC)resistance of high-strength low-alloy(HSLA)steels was investigated by varying the finish rolling temperature(FRT)and total rolling reduction.The results revealed granular bainite with large equiaxed grains was obtained by a total rolling reduction of60%with the FRT of 950℃(within recrystallization temperature T_(r)).The larger grain size and much less grain boundaries should account for the relatively lower strength and SCC resistance.A larger rolling reduction of 80% under the same FRT resulted in the formation of massive martensite-austenite(M/A)constituents and resultant low ductility and SCC resistance.In contrast,a good combination of strength,ductility and SCC resistance was obtained via 80% rolling reduction with the FRT of 860℃(within non-recrystallization temperature T_(nr)),probably because of the fine grain size and M/A constituents,as well as a high density of grain boundary network. | Hongchi Ma Baijie Zhao Yi Fan Kui Xiao Jinbin Zhao Xuequn Cheng Xiaogang Li | 2021 | Acta Metallurgica Sinica(English Letters)2021，34，4： | 4 |
| 15 | Stochastic Resonance in Bistable System Subject to Multiplicative and Additive Noise显示文摘In this paper, a simulation model of bistable system subject to multiplicative and additive noise is built on the basis of the theory of stochastic resonance(SR). SR phenomenon appears in the system subject to multiplicative and additive noise when a single signal transmits in the system. The output waveforms and the power spectrums at different frequencies are compared. The impact of the intensity of multiplicative and additive noise on the bistable system is discussed. It is found that this simulation model can upgrade the quality of the signal processing and the noise intensity can be effectively used for improving the effect of SR. | JIANG Xin, WANG Fuzhong, YAN Xuequn (College of Science, Tianjin Polytechnic University, Tianjin 300160, CHN) | 2010 | Semiconductor Photonics and Technology2010，16，4： | 3 |
| 16 | The effect of the rice blast resistance gene Pi36 on the expression of disease resistance-related genes显示文摘The resistance gene Pi36 confers a stable and high level of resistance against Chinese isolates of the rice blast pathogen Mag-naporthe oryzae.Quantitative real time RT-PCR was used to investigate the expression profiles of various resistance-related genes in both the Pi36/AvPi36 incompatible interactions.Among 17 members of the OsMAPK family,OsMAPK2,OsMAPK4,OsMAPK8 and OsMAPK15 were differentially expressed,as were OsWRKY30,OsWRKY32,OsWRKY64 and OsWRKY67 among the 13 OsWRKY members studied.The induction of the expression of genes from both of these families suggests that both the JA and SA pathways are involved in Pi36-mediated defence.Other genes differentially expressed included the OsbZIP transcription factors,OsNIF1 and OsNIF2,and the NPR1 homologue OsNH2,all of which were reported in the rice blast pathosystem.The in-volvement of these genes illustrates the complexity of the downstream signalling pathways involved in the Pi36/AvrPi36 interaction. | LIU XinQiong LI YuanYuan WANG LiYuan LIU XueQun WANG ChunTai WANG Ling PAN QingHua | 2010 | Chinese Science Bulletin2010，55，18： | 3 |
| 17 | Role of Martensite Structural Characteristics on Corrosion Features in Ni-Advanced Dual-Phase Low-Alloy Steels显示文摘The relationship between the corrosion resistance and martensite structure of Ni-advanced dual-phase weathering steel was studied using transmission electron microscopy,scanning electron microscopy,electrochemical analysis,and atomic force microscopy.The investigations indicate that the final microstructure of the dual-phase weathering steel was composed of a large amount of low-carbon lath martensite distributed in the ferrite matrix.The potential of the martensite phase is higher than that of ferrite,which acts as a microcathode.As the martensite volume fraction in the Ni-advanced dual-phase weathering steel increased,the corrosion rate increased owing to the greater galvanic couple formed between the ferrite and martensite from the increasing ratio of the cathode area to the anode area.In addition,this work provides a method to obtain advanced weathering steel with improved mechanical properties and corrosion resistance. | Chao Hai Xuequn Cheng Cuiwei Du Xiaogang Li | 2021 | Acta Metallurgica Sinica(English Letters)2021，34，6： | 2 |
| 18 | Constrained query of order-preserving submatrix in gene expression data显示文摘 | Tao JIANG Zhanhuai LI Xuequn SHANG Bolin CHEN Weibang LI Zhilei YIN | 2016 | Frontiers of Computer Science2016，10，6： | 2 |
| 19 | Identifying essential proteins based on dynamic protein-protein interaction networks and RNA-Seq datasets显示文摘The identification of essential proteins is not only important for understanding organism structure on the molecular level, but also beneficial to drug-target detection and genetic disease prevention. Traditional methods often employ various centrality indices of static protein-protein interaction(PPI) networks and/or gene expression profiles to predict essential proteins. However, the prediction accuracy of most methods still has room to be further improved. In this study, we propose a strategy to increase the prediction accuracy of essential protein identification in three ways. Firstly, RNA-Seq datasets are employed to construct integrated dynamic PPI networks. Using a RNA-Seq dataset is expected to give more accurate predictions than using microarray gene expression profiles. Secondly, a novel integrated dynamic PPI network is constructed by considering both the co-expression pattern and the co-expression level of the RNA-Seq data. Thirdly, a novel two-step strategy is proposed to identify essential proteins from two known centrality indices. Numerical experiments have shown that the proposed strategy can increase the prediction accuracy dramatically, which can be generalized to many existing methods and centrality indices. | Xuequn SHANG Yu WANG Bolin CHEN | 2016 | Science China(Information Sciences)2016，59，7： | 2 |
| 20 | Data-mining and atmospheric corrosion resistance evaluation of Sn-and Sb-additional low alloy steel based on big data technology显示文摘Machine-learning and big data are among the latest approaches in corrosion research.The biggest challenge in corrosion research is to accurately predict how materials will degrade in a given environment.Corrosion big data is the application of mathematical methods to huge amounts of data to find correlations and infer probabilities.It is possible to use corrosion big data method to distinguish the influence of the minimal changes of alloying elements and small differences in microstructure on corrosion resistance of low alloy steels.In this research,corrosion big data evaluation methods and machine learning were used to study the effect of Sb and Sn,as well as environmental factors on the corrosion behavior of low alloy steels.Results depict corrosion big data method can accurately identify the influence of various factors on corrosion resistance of low alloy and is an effective and promising way in corrosion research. | Xiaojia Yang Jike Yang Ying Yang Qing Li Di Xu Xuequn Cheng Xiaogang Li | 2022 | International Journal of Minerals,Metallurgy and Materials2022，29，4： | 2 |
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