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Effect of Revolution on inhomogeneous deformation of IF Steel in High Pressure Torsion

Materials Sciences and Applications 2016年第11期7卷 673-679页

作者： Yuepeng Song Miaomiao Chen Baoyan Xu Dongsheng Gao Hyoung Seop Kim Shandong Agricultural University Mechanical and Electronic Engineering College Tai’an China Shandong Agricultural University Shandong Provincial Key Laboratory of Horticultural Machineries and Equipments Tai’an China Pohang University of Science and Technology Department of Materials Science and Engineering Pohang Korea

The effect of revolution on inhomogeneous plastic deformation of HPT processed IF steel was investigated using experimental and simulation approaches. The results indicate that the degree of inhomogeneous plastic deformation increases as the revolutions increase along the radial direction on the transversal plane of disks. In addition, the hardness and the microstructure distributions verify the trend that the effective strain of the HPT processed disks at the early torsion stage is gradually deformed from the edge to the center with the revolutions increases.

关键词： High-Pressure Torsion inhomogeneous deformation IF Steel Revolution Finite El-ement Analysis

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Polyoxometalates-derived nanostructures for electrocatalysis application

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Rare Metals 2024年第5期43卷 1845-1866页

作者： Chao-Yue Sun Wen Li Kai Wang Wei-Jia Zhou Hai-Qing Wang Institute for Advanced Interdisciplinary Research(iAIR) College of Chemistry and Chemical EngineeringUniversity of JinanJinan250022China Shandong Electrical Engineering and Equipment Group Intelligent Electric Co. Ltd.Jinan 250022China

The conversion of intermittent renewable electrical energy to chemical energy is of great importance which can not only mitigate current energy and environmental crisis but also contribute to the ongoing carbon neutrality national *** is serving as a low-carbon conversion technology that enables green and efficient energy conversion mainly through hydrogen evolution reaction(HER),carbon dioxide reduction reaction(CO_(2)RR),and nitrogen reduction reaction(NRR).The core of electrocatalysis is the design and construction of low-cost high-activity and high-stability electrocatalyst to drive reaction thermodynamics and *** employment of polyoxometalates(POMs)as platforms or precursors to construct different types of electrocatalysts has been widely ***,we systematically summarized the recent advances in POM-derived nanostructures for electrocatalysis *** strategies for precursor design and electrocatalyst synthesis were briefly *** morphology control,phase control,composite modulation,and heterostructure engineering in POM-derived nanostructures were presented in *** structure–activity relationship of POM-derived nanostructures is fully discussed for HER CO_(2)RR,and NRR ***,the current challenges and future outlooks of POM-derived nanostructures are summarized to provide insights toward high-efficiency electrocatalysts for energy conversion technologies.

关键词： Microforming Cylindrical compression Size effects Grain orientation inhomogeneous deformation

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Mechanism of size effects in microcylindrical compression of pure copper considering grain orientation distribution

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Rare Metals 2013年第1期32卷 18-24页

作者： Chuan-Jie Wang Chun-Ju Wang Bin Guo De-Bin Shan Yan-Yan Chang School of Materials Science and Engineering Harbin Institute of Technology Key Laboratory of Micro-Systems and Micro-Structures Manufacturing Harbin Institute of Technology

In microscale deformation, the magnitudes of specimen and grain sizes are usually identical, and size- dependent phenomena of deformation behavior occur, namely, size effects. In this study, size effects in micro- cylindrical compression were investigated experimentally. It was found that, with the increase of grain size and decrease of specimen size, flow stress decreases and inhomogeneous material flow increases. These size effects tend to be more distinct with miniaturization. Thereafter, a modified model considering orientation distribution of surface grains and continuity between surface grains and inner grains is developed to model size effects in micro- forming. Through finite element simulation, the effects of specimen size, grain size, and orientation of surface grains on the flow stress and inhomogeneous deformation were analyzed. There is a good agreement between experimental and simulation results.

关键词： Microforming Cylindrical compression Sizeeffects Grain orientation inhomogeneous deformation

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TEXTURE IN inhomogeneousLY ROLLED ALUMINIUM SHEET

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Transactions of Nonferrous Metals Society of China 1992年第1期2卷 98-103页

作者： Mao Weimin University of Science and Technology Beijing 100083China

The changs of stress state in cold rolled aluminium sheet with large pass reduction,the combining activation process of slip systems as well as the formation mechanism of corresponding shear textures were *** is shown that the rolling deformation with large pass reduction produces not only the general rolling stresses but also a strong shear stress in aluminium *** increasing additional shear stress the general rolling textures,i.e.{112},{123},{110}and{110}decrease,and the shear texture,i.e.{001}as well as{111}fibre texture become *** internal relation of these two kinds of textures was also discussed.

关键词： inhomogeneous deformation aluminium texture

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