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Deformation behavior of Mg-y-Ni alloys containing different volume fraction of LPSO phase during tension and compression through in-situ synchrotron diffraction

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Journal of Magnesium and Alloys 2024年第9期12卷 3631-3645页

作者： S.Z.wu y.Q.Chi g.garces X.H.Zhou H.g.Brokmeier X.g.Qiao M.y.Zheng School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China School of Electromechanical Engineering Guangdong University of TechnologyGuangzhou 510006China Department of Physical Metallurgy CENIM-CSICAvenida Gregorio del Amo 828040 MadridSpain Institute of Materials Science and Engineering Clausthal University of TechnologyAgricolastrasse 6D-38678 Clausthal-ZellerfeldGermany

The deformation behavior of the as-extruded Mg-y-Ni alloys with different volume fraction of long period stacking ordered(LPSO)phase during tension and compression was investigated by in-situ synchrotron *** micro-yielding,macro-yielding,tension-compression asymmetry and strain hardening behavior of the alloys were explored by combining with deformation *** micro-yielding is dominated by basal slip of dynamic recrystallized(DRXed)grains in tension,while it is dominated by extension twinning of non-dynamic recrystallized(non-DRXed)grains in *** macro-yielding,the non-DRXed grains are still elastic deformed in tension and the basal slip of DRXed grains in compression are ***,the LPSO phase still retains elastic deformation,but can bear more load,so the higher the volume fraction of hard LPSO phase,the higher the tensile/compressive macro-yield strength of the *** from the low volume fraction of the non-DRXed grains and the delay effect of LPSO andγphases on extension twinning,the as-extruded alloys exhibit excellent tension-compression *** the volume fraction of LPSO phase reaches∼50%,tension-compression asymmetry is reversed,which is due to the fact that the LPSO phase is stronger in compression than in *** tensile strain hardening behavior is dominated by dislocation slip,while the dominate mechanism for compressive strain hardening changes from twinning in theα-Mg grains to kinking of the LPSO phase with increasing volume fraction of LPSO *** activation of kinking leads to the constant compressive strain hardening rate of∼2500 MPa,which is significantly higher than the tensile strain hardening rate.

关键词： Mg-y-Ni alloys LPSO phase In-situ synchrotron diffraction Micro-yielding Tensile-compression asymmetry Strain hardening

AN IN-SITU STUDy ON DISLOCATION BEHAVIOR OF CRACK-TIP IN Ti_3Al-Nb ALLOy

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中国有色金属学会会刊：英文版 1997年第3期7卷 31-37页

作者： wu, y Zhen, L yang, DZ Liang, W HARBIN INST TECHNOL SCH MAT SCI & ENGN HARBIN 150001 PEOPLES R CHINA TAIyUAN UNIV TECHNOL DETECTING CTR TAIYUAN 030024 PEOPLES R CHINA

ＡＮＩＮＳＩＴＵＳＴＵＤＹＯＮＤＩＳＬＯＣＡＴＩＯＮＢＥＨＡＶＩＯＲＯＦＣＲＡＣＫＴＩＰＩＮＴｉ３ＡｌＮｂＡＬＬＯＹ①ＷｕＹｉｎｇ，ＺｈｅｎＬｉａｎｇ，ＹａｎｇＤｅｚｈｕａｎｇＳｃｈｏｏｌｏｆＭａｔｅｒｉａｌｓ... 详细信息

ＡＮＩＮＳＩＴＵＳＴＵＤＹＯＮＤＩＳＬＯＣＡＴＩＯＮＢＥＨＡＶＩＯＲＯＦＣＲＡＣＫＴＩＰＩＮＴｉ３ＡｌＮｂＡＬＬＯＹ①ＷｕＹｉｎｇ，ＺｈｅｎＬｉａｎｇ，ＹａｎｇＤｅｚｈｕａｎｇＳｃｈｏｏｌｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅａｎｄＥｎｇｉｎｅｒ...

关键词： Ti 3Al Nb alloy tensile deformation crack propagation dislocation

The Strategy of Third-Party Mediation Based on the Option Prioritization in the graph Model

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Journal of Systems Science and Systems Engineering 2019年第4期28卷 399-414页

作者： Zhenggao wu Haiyan Xu ginger y. Ke College of Economics and Management Nanjing University of Aeronautics and Astronautics Nanjing 211106 China Faculty of Business Administration Memorial University of Newfoundland St. John's Newfoundland and Labrador A1B 3X5 Canada

The resolution of real-world conflicts is often supported by third-party intervention (i.e., media? tion). This paper proposes a possible mediation support in the form of a reverse optimization procedure under the framework of the graph Model for Conflict Resolution (gMCR). The approach computes minimal priority adjustments of preference statements that are necessary to achieve a desired agreement. A mathematical model, based on the matrix form of gMCR, is developed to analyze this third-party mediation problem. Thereby;this study makes a first attempt to obtain option-based mediation strategies, which add comprehensiveness to the traditional state-based strategies, yet are easier to understand and hence more acceptable to the conflict participants. To illustrate the practicality;the proposed procedure is applied to a medical dispute between a patient and a hospital, with the aim to suggest changes in the ordering of preference statements that lead to a desired outcome.

关键词： graph Model for Conflict Resolution third party mediation option prioritization minimal adjustment

USINg HIgH Mg-CONTENT CORED-WIRE TO SPHEROIDIZE AND DESULPHURIZE DUCTILE IRON MELT IN INDUSTRIAL EXPERIMENTS

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Acta Metallurgica Sinica(English Letters) 2004年第6期17卷 881-887页

作者： R.Z.wu B.D.Sun H.J.Ni y.B.wu H.S.wu J.g.ge TheStateKeyLaboratoryofMetalMatrixComposites ShanghaiJiaotongUniversityShanghai200030China TheCollegeofMaterialScience＆Engineering HarbinUniversityofScience＆TechnologyHarbin150080China FoundryBranch HarbinDong＇anEngineCo.Ltd.Harbin150066China

Mg-content cored-wire was used to desulphurize and spheroidize ductile iron melt in industrial experiments. The optimal feeding speed and suitable treatment temperature were determined in the experiments. And cored-wire method and pouring method were compared. Conclusions have been drawn that, under these conditions in the experiments, the optimal feeding speed is 15m/min, treatment temperature should be as low as possible, 1400-1450℃ generally; and cored-wire method can act more effective in ductile iron melt desulphurization and spheroid than pouring method.

关键词： high Mg-content cored-wire cored-wire method spheroid desulphurization

CALCULATION OF TRANSFORMATION VOLUME FRACTION TO HQ590 HOT ROLLED STRIP STEEL DURINg CONTINUOUS COOLINg

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Acta Metallurgica Sinica(English Letters) 2004年第5期17卷 754-760页

作者： X.g.Zhou X.M.Zhao y.B.Xu D.wu TheStateKeyLab.ofRollingTechnologyandAutomation NortheasternUniversityShenyang110004China

On the basis of phase transformation kinetics, the transformation of γ→α,P,B have been investigated through considering the effect of deformation. The calculation methods of volume fraction have also been given. Co... 详细信息

关键词： transformation kinetics volume fraction nucleation rate

Catalyst–Support Interaction in Polyaniline‑Supported Ni_(3)Fe Oxide to Boost Oxygen Evolution Activities for Rechargeable Zn‑Air Batteries

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Nano-Micro Letters 2025年第1期17卷 176-190页

作者： Xiaohong Zou Qian Lu Mingcong Tang Jie wu Kouer Zhang Wenzhi Li yunxia Hu Xiaomin Xu Xiao Zhang Zongping Shao Liang An Department of Mechanical Engineering The Hong Kong Polytechnic UniversityHung HomKowloonHong Kong SARPeople’s Republic of China Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment TechnologySchool of Environmental Science and TechnologyNanjing University of Information Science and TechnologyNanjing 210044People’s Republic of China Department of Chemistry The Chinese University of Hong KongMa Lin BuildingShatinHong Kong SAR 999077People’s Republic of China WA School of Mines:Minerals Energy and Chemical Engineering(WASM‑MECE)Curtin UniversityPerthWA 6102Australia Research Institute for Advanced Manufacturing The Hong Kong Polytechnic UniversityHung HomKowloonHong Kong SARPeople’s Republic of China Research Institute for Smart Energy The Hong Kong Polytechnic UniversityHung HomKowloonHong Kong SARPeople’s Republic of China

Catalyst–support interaction plays a crucial role in improving the catalytic activity of oxygen evolution reaction(OER).Here we modulate the catalyst–support interaction in polyaniline-supported Ni_(3)Fe oxide(Ni_(3)Fe oxide/PANI)with a robust hetero-interface,which significantly improves oxygen evolution activities with an overpotential of 270 mV at 10 mA cm^(-2)and specific activity of 2.08 mA cm_(ECSA)^(-2)at overpotential of 300 mV,3.84-fold that of Ni_(3)Fe *** is revealed that the catalyst–support interaction between Ni_(3)Fe oxide and PANI support enhances the Ni–O covalency via the interfacial Ni–N bond,thus promoting the charge and mass transfer on Ni_(3)Fe *** the excellent activity and stability,rechargeable Zn-air batteries with optimum Ni_(3)Fe oxide/PANI are assembled,delivering a low charge voltage of 1.95 V to cycle for 400 h at 10 mA cm^(-2).The regulation of the effect of catalyst–support interaction on catalytic activity provides new possibilities for the future design of highly efficient OER catalysts.

关键词： Catalyst-support interaction Supported catalysts Heterointerface Oxygen evolution reaction Zn-air batteries

ELECTRON TRANSFER BETWEEN Eu￣(3+) AND Ce￣(3+) IN SrMgF_4 MATRIX

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Chinese Chemical Letters 1995年第5期6卷 449-452页

作者： wu, y Shi, CS Chinese Acad Sci Changchun Inst Appl Chem Lab Rare Earth Chem & Phys Changchun 130022 Peoples R China

Emissions of europium (Ⅱ ) and europium (Ⅲ) have been observed in SrMgF4: Eu and SrMgF4: Eu, Ce phosphors which are synthesized in Ar flow, It is notable that the intensity of the ESR peaks eorresponding to Eu3+ is... 详细信息

关键词： ELECTRON TRANSFER BETWEEN Eu AND Ce IN SrMgF4 MATRIX

Autism, an area that needs public attention and investment

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Science China(Life Sciences) 2015年第10期58卷 931-932页

作者： Jane y.wu Department of Neurology Center for Genetic Medicine Lurie Cancer Center Northwestern University Feinberg School of Medicine State Key Laboratory of Brain and Cognitive Science Institute of Biophysics Chinese Academy of Sciences

I would like to dedicate this special issue to children and adults who are affected by autism or related developmental disorders, as well as to their families and friends. I am indebted to the clinicians and care providers who have made tremendous effort in supporting these patients. They have inspired me to invest a significant amount of my energy to adventure into this area. I greatly appreciate all the contributing authors around the world whose hard work made this special issue possible.

关键词：自闭投资公众成年人

In vitro Study on Biodegradable AZ31 Magnesium Alloy Fibers Reinforced PLgA Composite

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Journal of Materials Science & Technology 2013年第6期29卷 545-550页

作者： y.H.wu N.Li y.Cheng y.F.Zheng y.Han Center for Biomedical Materials and Tissue Engineering Academy for Advanced Interdisciplinary StudiesPeking University Department of Materials Science and Engineering College of EngineeringPeking University State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University

AZ31 magnesium alloy fibers reinforced poly（lactic-co-glycolic acid）（PLgA） composites were prepared and their mechanical property, immersion corrosion behavior and biocompatibility were studied. The tensile test showed that with the addition of AZ31 fibers, the composites had a significant increment in tensile strength and elongation. For the direct cell attachment test, all the cells showed a healthy morphology and spread well on the experimental sample surfaces. The immersion results indicated that pH values of the immersion medium increased with increasing AZ31 fiber contents. All the in vitro experimental results indicated that this new kind of magnesium alloy fibers reinforced PLgA composites show a potential for future biomedical applications.

关键词： Biomaterials Corrosion Polymeric composites AZ31 magnesium fiber