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An Aluminide Surface Layer Containing Lower-Al on Ferritic-Martensitic Steel Formed by Lower-Temperature Aluminization

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Journal of Materials Science & Technology 2015年第12期31卷 1268-1273页

作者： S.Guo z.b.wang K.Lu Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of Sciences

An aluminide（AlFe and α-（FeAl）） surface layer containing lower-Al was formed on ferritic-martensitic steel P92 by means of surface mechanical attrition treatment（SMAT） combined with a duplex aluminization process at lower temperatures,i.e.a packed aluminization followed by a diffusion annealing treatment below its tempering *** tests indicated that the lower-Al surface layer formed on the SMAT sample is more resistant to cracking and has better adhesion to the substrate in comparison with the Al 5Fe 2 layer formed on the as-received sample after the duplex aluminization *** steam oxidation measurements showed that the oxidation resistance is increased significantly by the lower-Al surface layer due to the formation of a protective（Fe,Cr）Al 2O 4 *** rate constant of oxidation was estimated to decrease from-0.849 mg^2 cm^-4h^-1 of the as-received material to^0.011 mg^2 cm^-4 h^-1 of the AlFe layer at 700 ℃.

关键词： Surface mechanical attrition treatment (SMAT) Ferritic-martensitic steel Lower-temperature aluminization Aluminide Steam oxidation

Diffusion behavior of Cr in gradient nanolaminated surface layer on an interstitial-free steel

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Journal of Materials Science & Technology 2019年第3期35卷 460-464页

作者： S.L.Xie z.b.wang K.Lu Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences School of Materials Science and Engineering University of Science and Technology of China

Nanolaminated structures composed of low-angle grain boundaries(LAGbs) possess high thermal stability. In this paper, a gradient nanolaminated(GNL) surface layer with smooth finish was fabricated on an interstitial-free steel by means of surface mechanical rolling treatment. Microstructural observations demonstrated that the average lamellar thickness is about 80 nm in the topmost surface layer and increases with increasing depth. High thermal stability was confirmed in the GNL surface layer after annealing at 500℃. Diffusion measurements showed that effective diffusivity of Cr in GNL layer is 4–6 orders of magnitude higher than lattice diffusivity within the temperature range from 400 to 500℃. This might be attributed to numerous LAGbs or dislocation structures with a higher energy state in the GNL surface layer. This work demonstrates the possibility to advanced chromizing(or other surface alloying)processes of steels with formation of GNL surface layer, so that a thicker alloyed surface layer with a stable nanostructure is achieved.

关键词： Gradient nanolaminated structure Interstitial-free steel Diffusion Low-angle grain boundary Surface mechanical rolling treatment

A review on under-deposit corrosion of pipelines in oil and gas fields: Testing methods, corrosion mechanisms and mitigation strategies

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Corrosion Communications 2022年第3期7卷 70-81页

作者： z.b.wang L.Pang Y.G.zheng CAS Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal Research Chinese Academy of Sciences

Under-deposit corrosion(UDC) due to the presence of deposits has become a major concern threatening the safe service of pipelines in oil and gas fields, causing economic loss and even irreversible damage to life and environment. Herein, we provide a critical review of UDC in terms of testing methods, corrosion mechanisms and mitigation strategies, so as to better understand and prevent UDC. Two deposit simulation methods and three UDC testing systems are summarized. Two popular UDC mechanisms are discussed based on the coverage and protectiveness of deposits, and the galvanic couple caused by the uneven distribution of deposits is found to be the root cause for the prevailed localized corrosion under deposits. The mitigation strategies for UDC are reviewed from the aspects of scale controlling and corrosion inhibition. In the last, the demands for developing accurate deposit simulation methods, effective UDC inhibitors and advanced on-site scale monitoring technologies are proposed.

关键词： Under-deposit corrosion Pipeline Deposit Corrosion mechanism Scale controlling Corrosion inhibitor

Correlation between depassivation and repassivation processes determined by single particle impingement:Its crucial role in the phenomenon of critical flow velocity for erosion-corrosion

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Journal of Materials Science & Technology 2021年第30期89卷 158-166页

作者： L.L.Li z.b.wang S.Y.He Y.G.zheng CAS Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Department of Physics Southern University of Science and TechnologyGuangdong 518055China

The correlation between depassivation and repassivation processes,which is significant in erosioncorrosion,was quantitatively investigated by single particle impingement tests at various flow velocities and impact *** results show that both repassivation and depassivation processes are associated with the kinetic energy of solid particle,and demonstrate that the repassivation is retarded by *** phenomenon probably results from the depassivation-induced microstructure *** this basis,the dependence of critical flow velocity(CFV)for erosion-corrosion on the solid particle concentration and diameter is further theoretically predicted and experimentally ***,the crucial role of depassivation-repassivation in CFV phenomenon is further highlighted.

关键词： Erosion-corrosion Stainless steel Depassivation-repassivation Single particle impact Passive film

Movement of tidal watersheds in the Wadden Sea and its consequences on the morphological development

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International Journal of Sediment Research 2013年第2期28卷 162-171页

作者： z.b.wang J.VROOM b.C.van PROOIJEN R.J.LAbEUR M.J.F.STIVE Delft University of Technology Faculty of Civil Engineering and Geosciences

The Wadden Sea consists of a series of tidal lagoons which are connected to the North Sea by tidal *** of each lagoon are the mainland coast,the barrier islands on both sides of the tidal inlet,and the tidal watersheds behind the two barrier *** each Wadden Island there is a tidal watershed separating two adjacent tidal *** locations of the tidal watersheds in the Wadden Sea are not *** after a human interference in one of the tidal lagoons,a tidal watershed can move and thereby influence the distribution of area between the lagoons. This appears to be important for the morphological development in not only the basin in which the interference takes place,but also in the adjacent *** paper describes theoretical analyses and numerical modelling aimed at improving the insights into the location of the tidal watersheds,their movements,and the impact of the movements of tidal watersheds on the morphological development of a multi-basin system like the Wadden Sea.

关键词： Wadden Sea Tide Tidal watershed Morphological equilibrium Sediment demand

Low-Temperature Nitriding by Means of SMAT

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材料热处理学报 2004年第5期25卷 301-306页

作者： W.P.Tong H.W.zhang N.R.Tao z.b.wang J.Lu K.Lu ShenyangNationalLaboratoryforMaterialsScience InstituteofMetalResearchChineseAcademyofSciencesShenyang110016China LASMIS UniversityofTechnologyofTroyes10000TroyesFrance.

The microstructure in the surface layer of iron and steel samples can be refined at the nanometer scale by means of a surface mechanical attrition treatment (SMAT) that generates repetitive severe plastic deformation to the surface layer. The subsequent nitriding kinetics of the as-treated samples with the nanostructured surface layer is greatly enhanced so that the nitriding temperatures can be reduce to 300 - 400 °C regions. This enhanced processing method demonstrates both the technological significance of nanomaterials in advancing the traditional processing techniques, and provides a new approach for selective surface reactions in solids. This article reviews the present state of the art in this field. The microstructure and properties of SMAT samples nitrided will be summarized. Further considerations of the development and applications of this new technique will also be presented.

关键词：低温渗氮 SMAT 纳米结晶表面机械损耗

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含沙量对冲积河流河型的影响

人民黄河 2005年第11期 80-80页

作者： D.S.van Maren,J.C.Winterwerp,H.J.de Vriend,z.b.wang,z-Y wang,J.J.zhou,b.S.Wu 德尔伏特科技大学土木工程和地球科学学院德尔伏特科技大学土木工程和地球科学学院德尔伏特科技大学土木工程和地球科学学院德尔伏特科技大学土木工程和地球科学学院清华大学水利工程学院清华大学水利工程学院清华大学水利工程学院荷兰德尔伏特荷兰德尔伏特荷兰德尔伏特荷兰德尔伏特

由水利部黄河水利委员会主办的第二届黄河国际论坛,于2005年10月18日21日在郑州召开,来自全球60多个国家和地区的800多名专家学者参加了这次世界水利盛会。本次大会的中心议题是维持河流健康生命,分维持河流健康生命、流域水资源一体化... 详细信息

由水利部黄河水利委员会主办的第二届黄河国际论坛,于2005年10月18日21日在郑州召开,来自全球60多个国家和地区的800多名专家学者参加了这次世界水利盛会。本次大会的中心议题是维持河流健康生命,分维持河流健康生命、流域水资源一体化管理及现代技术应用、河流工程与非工程技术、水环境与水生态保护、跨流域调水技术及水资源配置、水权水价及水市场政策等6个专题,共收到论文400多篇,在大会主会场和66个分会场,与会代表进行了充分的交流。本期杂志在全文刊发黄河国际论坛组委会主席、黄河水利委员会主任、教授级高级工程师李国英的主题报告《维持河流健康生命——以黄河为例》和图片报道的同时,从大会交流的论文中选编40篇论文的文摘,以尽可能多的篇幅介绍本次大会的盛况,希望能对广大读者有所裨益。需要说明的是,刊出的文摘在体例上与往期杂志有所不同,同时由于时间紧迫和篇幅所限,难免挂一漏万或存在差错,请会议论文作者及广大读者鉴谅。

关键词：河道淤积河道形态河床形态高含沙水流高含沙浑水水流动含沙量含沙浓度分汊

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含沙量对冲积河流河型的影响

人民黄河 2005年第11期27卷 76-76页

作者： D.S.van Maren J.C.Winterwerp H.J.de Vriend z.b.wang z-Y wang J.J.zhou b.S.Wu 德尔伏特科技大学土木工程和地球科学学院清华大学水利工程学院

黄河下游泥沙输送的机理随含沙量的变化很大。黄河下游的河道一般呈游荡型或弯曲型，显著特点是在低含沙量和高含沙量条件下都存在着强烈的河道侵蚀及游荡型河道形态，而淤积和游荡则多发生于中等含沙量条件下。一维数值模型揭示了某些... 详细信息

黄河下游泥沙输送的机理随含沙量的变化很大。黄河下游的河道一般呈游荡型或弯曲型，显著特点是在低含沙量和高含沙量条件下都存在着强烈的河道侵蚀及游荡型河道形态，而淤积和游荡则多发生于中等含沙量条件下。一维数值模型揭示了某些河床形态可能与泥沙密度的垂向层状分布及其阻碍沉降效果有密切关系。泥沙含量不大的情况下水流是次饱和的，流速呈对数曲线分布，泥沙容重呈层状分布，次饱和水流造成河床冲刷和弯曲型河道；高含沙水流情况下，水流的紊动结构造成的含沙量纵剖面变化，形成超饱和水流；在更高含沙量（10—100kg／m^3）情况下，悬移质泥沙可造成垂向几乎为常数的宙沙量纵剖面及对数流速分布。这些可以由泥沙引起容重效应的IDV模型进行验证，而河道形态变化可由3D模型模拟。河流形态模拟揭示了在相对低含沙水流中形成游荡型河道，主要是由于河道淤积、壅水、分汊形成新流路造成。当存在高含沙水流时，河床受到冲刷，水位降低，大堤约束河道，从而减小了游荡强度。另外，落淤速度的降低造成河道淤积减弱，形成冲刷，结果高含沙水流却形成了弯曲型河道。

关键词：冲积河流含沙量高含沙水流河道形态泥沙输送河型河床冲刷河道淤积黄河下游河床形态

Antithetical impacts of deleterious LRP1b mutations in non-squamous and squamous NSCLCs on predicting benefits from immune checkpoint inhibitor alone or with chemotherapy over chemotherapy alone: retrospective analyses of the POPLAR/OAK and CHOICE-01 trial

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Science China Life Sciences 2025年第1期68卷 249-262页

作者： Jinliang wang Wenyong zhou Yu Xu Jianchun Duan Qiaoxia zhou Guoqiang wang Leo Li Chunwei Xu Wenxian wang Shangli Cai zhijie wang Jie wang Department of Oncology The Fifth Medical Center of Chinese PLA General Hospital Department of Thoracic Surgery Shanghai Chest HospitalSchool of MedicineShanghai Jiao Tong University burning Rock biotech CAMS Key Laboratory of Translational Research on Lung Cancer State Key Laboratory of Molecular OncologyDepartment of Medical OncologyNational Cancer Center/National Clinical Research Center for ancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical College Institute of basic Medicine and Cancer (IbMC) Chinese Academy of Sciences Department of Clinical Trial The Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital)

In non-small cell lung cancers,the non-squamous and squamous subtypes（nsqNSCLC and sqNSCLC） exhibit disparities in pathophysiology,tumor immunology,and potential genomic correlates affecting responses to immune checkpoint inhibitor（ICI）-based *** our inhouse training cohort（n=85）,the presence of the LRP1b deleterious mutation（LRP1b-del） was associated with longer and shorter progression-free survival（PFS） on ICIs alone in nsqNSCLCs and sqNSCLCs,respectively(Pinteraction=0.008).These results were validated using a larger public ICI cohort(n=208,Pinteractionbetween LRP1b-del and increased and decreased numbers of tumor-infiltrating CD8+T cells in nsqNSCLCs（P=0.040） and sqNSCLCs（P=0.014）,*** the POPLAR/OAK cohort,nsqNSCLCs with LRP1b-del demonstrated improved PFS benefits from atezolizumab over docetaxel(hazard ratio（HR）=0.70,P=0.046),whereas this benefit was negligible in those without LRP1b-del（HR=1.05,P=0.64）.Conversely,sqNSCLCs without LRP1b-del benefited more from atezolizumab（HR=0.60,P=0.002） than those with LRP1b-del（HR=1.30,P=0.31）.Consistent results were observed in the in-house CHOICE-01 cohort,in which nsqNSCLCs with LRP1b-del and sqNSCLCs without LRP1b-del benefited more from toripalimab plus chemotherapy than from chemotherapy alone(Pinteraction=0.008).This multi-cohort study delineates the antithetical impacts of LRP1b-del in nsqNSCLCs and sqNSCLCs on predicting the benefits from ICI alone or with chemotherapy over chemotherapy *** findings highlight the distinct clinical utility of LRP1b-del in guiding treatment choices for nsqNSCLCs and sqNSCLCs,emphasizing the necessity for a detailed analysis based on pathological subtypes when investigating biomarkers for cancer therapeutics.

关键词： non-squamous NSCLC squamous NSCLC LRP1b deleterious mutations predictive biomarker immune checkpoint inhibitor