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Carbon Fiber Breakage Mechanism in Aluminum(Al)/Carbon Fibers(CFs) Composite Sheet during Accumulative Roll Bonding(ARB) Process
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作者 胡淑芬 SUN Zhenzhong +3 位作者 SHEN Fanghua DENG Jun 杨卫平 杨浩坤 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS CSCD 2024年第1期167-173,共7页
We put forward a method of fabricating Aluminum(Al)/carbon fibers(CFs) composite sheets by the accumulative roll bonding(ARB) method. The finished Al/CFs composite sheet has CFs and pure Al sheets as sandwich and surf... We put forward a method of fabricating Aluminum(Al)/carbon fibers(CFs) composite sheets by the accumulative roll bonding(ARB) method. The finished Al/CFs composite sheet has CFs and pure Al sheets as sandwich and surface layers. After cross-section observation of the Al/CFs composite sheet, we found that the CFs discretely distributed within the sandwich layer. Besides, the tensile test showed that the contribution of the sandwich CFs layer to tensile strength was less than 11% compared with annealed pure Al sheet. With ex-situ observation of the CFs breakage evolution with-16%,-32%, and-45% rolling reduction during the ARB process, the plastic instability of the Al layer was found to bring shear damages to the CFs. At last, the bridging strengthening mechanism introduced by CFs was sacrificed. We provide new insight into and instruction on Al/CFs composite sheet preparation method and processing parameters. 展开更多
关键词 Al/CFs composite sheet accumulative roll bonding tensile strength plastic instability carbon fiber breakage
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Comparison of microstructures and mechanical properties of composite extruded AZ31 sheets 被引量:12
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作者 Yanfu Chai Yan Song +7 位作者 Bin Jiang Jie Fu Zhongtao Jiang Qingshan Yang Haoran Sheng Guangsheng Huang Dingfei Zhang Fusheng Pan 《Journal of Magnesium and Alloys》 SCIE 2019年第4期547-554,共8页
The microstructures and mechanical properties of the composite extruded AZ31/AZ31 and AZ31/4047 Al sheets were investigated and made a comparison to the conventional extruded AZ31 sheet.Owing to the introduced intense... The microstructures and mechanical properties of the composite extruded AZ31/AZ31 and AZ31/4047 Al sheets were investigated and made a comparison to the conventional extruded AZ31 sheet.Owing to the introduced intense shear deformation at the interface during the composite extrusion,grain refinement and tilted texture were detected in AZ31 layers of the AZ31/AZ31 and AZ31/4047 Al sheets,while the conventional extruded AZ31 sheet exhibited a relative coarse,inhomogeneous microstructure and strong basal texture.The compressiontension yield ratio was increased gradually from the AZ31 to the AZ31/AZ31 and AZ31/4047 Al sheets.Besides,the AZ31/4047 Al sheet could successfully accomplish the whole bending forming process at room temperature,while the AZ31 and AZ31/AZ31 sheets were both bend-formed to failure with significant cracks in the outer tensile region under the identical bending parameters.Moreover,under the same bending strain,both the outward offset degree of strain neutral layer and the sheet thickening were more serious in the AZ31/4047 Al composite sheet than those of the AZ31 and AZ31/AZ31 sheets.The foremost reason was the quite wide gap of material properties between Mg alloy AZ31 layer(tensile loading in the outer region)and Al 4047 layer(compressive loading in the inner region). 展开更多
关键词 Mg alloy sheet composite extrusion Tension-compression yield asymmetry BENDABILITY
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Formation mechanism and control of aluminum layer thickness fluctuation in embedded aluminum-steel composite sheet produced by cold roll bonding process 被引量:5
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作者 Chun-yang WANG Yan-bin JIANG +3 位作者 Jian-xin XIE Sheng XU De-jing ZHOU Xiao-jun ZHANG 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2017年第5期1011-1018,共8页
The influences of rolling reduction and aluminum sheet initial thickness(AIT)on the thickness fluctuation of aluminum layer(TFA)of embedded aluminum?steel composite sheet produced by cold roll bonding were investigate... The influences of rolling reduction and aluminum sheet initial thickness(AIT)on the thickness fluctuation of aluminum layer(TFA)of embedded aluminum?steel composite sheet produced by cold roll bonding were investigated,the formation mechanism of TFA was analyzed and method to improve the thickness uniformity of the aluminum layer was proposed.The results showed that when the reduction increased,TFA increased gradually.When the reduction was lower than40%,AIT had negligible effect on the TFA,while TFA increased with the decrease of AIT when the reduction was higher than40%.The non-uniformities of the steel surface deformation and the interfacial bonding extent caused by the work-hardened steel surface layer,were the main reasons for the formation of TFA.Adopting an appropriate surface treatment can help to decrease the hardening extent of the steel surface for improving the deformation uniformity during cold roll bonding process,which effectively improved the aluminum thickness uniformity of the embedded aluminum/steel composite sheets. 展开更多
关键词 aluminum.steel composite sheet cold roll bonding work-hardened surface layer thickness fluctuation
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Flexural behavior of composite beams after the ultimate limit state externally strengthened with CFRP sheets bonded with high-temperature resistant matrix 被引量:2
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作者 陈伟宏 郑文忠 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2010年第5期679-683,共5页
In this paper the alkali-activated slag cementitious materials(AASCM)which strength at 600 ℃ is larger than that of AASCM at room temperature,were prepared to paste CFRP sheets to strengthen four simply supported unb... In this paper the alkali-activated slag cementitious materials(AASCM)which strength at 600 ℃ is larger than that of AASCM at room temperature,were prepared to paste CFRP sheets to strengthen four simply supported unbonded prestressed composite beams encased circular steel tube truss after ultimate limit state.Test on flexural behavior of these four beams was performed.Moreover,normal section load-bearing capacity of these beams and the curve load-deflection at mid-span were obtained.Experimental results show that it is feasible to strengthen concrete members with CFRP sheets bonded with AASCM.Based on the experimental results and theoretical study,computational method of stiffness is proposed for calculating bending rigidity and normal section load-bearing capacity of concrete simply supported beams strengthened with CFRP sheets bonded with AASCM.Formula of bending rigidity calculation was founded which results are in good agreement with testing data. 展开更多
关键词 alkali-activated slag cementitious materials high-temperature resistance CFRP sheets strengthening composite beam
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Stress and buckling analysis of a thick-walled micro sandwich panel with a flexible foam core and carbon nanotube reinforced composite (CNTRC) face sheets 被引量:2
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作者 A.AMIRI M.MOHAMMADIMEHR M.ANVARI 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI CSCD 2020年第7期1027-1038,共12页
In this paper,the stresses and buckling behaviors of a thick-walled mi-cro sandwich panel with a flexible foam core and carbon nanotube reinforced composite(CNTRC)face sheets are considered based on the high-order she... In this paper,the stresses and buckling behaviors of a thick-walled mi-cro sandwich panel with a flexible foam core and carbon nanotube reinforced composite(CNTRC)face sheets are considered based on the high-order shear deformation theory(HSDT)and the modified couple stress theory(MCST).The governing equations of equi-librium are obtained based on the total potential energy principle.The effects of various parameters such as the aspect ratio,elastic foundation,temperature changes,and volume fraction of the canbon nanotubes(CNTs)on the critical buckling loads,normal stress,shear stress,and deflection of the thick-walled micro cylindrical sandwich panel consider-ing different distributions of CNTs are examined.The results are compared and validated with other studies,and showing an excellent compatibility.CNTs have become very use-ful and common candidates in sandwich structures,and they have been extensively used in many applications including nanotechnology,aerospace,and micro-structures.This paper also extends further applications of reinforced sandwich panels by providing the modified equations and formulae. 展开更多
关键词 stress and buckling analysis thick-walled micro cylindrical sandwich panel flexible foam core carbon nanotube reinforced composite(CNTRC)face sheet high-order shear deformation theory(HSDT)
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Numerical simulation of temperature field in plasma-arc flexible forming of laminated-composite metal sheets 被引量:3
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作者 宋文庆 徐文骥 +2 位作者 王续跃 孟建兵 李洪友 《中国有色金属学会会刊:英文版》 CSCD 2009年第B09期61-67,共7页
Flexible forming of laminated-composite metal sheets (LCMS) using plasma arc is a latest technique, which produces LCMS components by thermal stress without mould and external force. Considering that the controllable ... Flexible forming of laminated-composite metal sheets (LCMS) using plasma arc is a latest technique, which produces LCMS components by thermal stress without mould and external force. Considering that the controllable temperature field is the key during the forming process, a three-layer FEM model, based on the characteristics along LCMS thickness direction, was developed to study the variation rules of temperature field, which was verified robustness by experimental validation. Besides, the influences of process parameters such as plasma arc power, scanning speed and plasma arc diameter on LCMS temperature field were performed. The comparisons of LCMS with single layer metal sheet (SLMS) show the temperature difference of LCMS along thickness direction is smaller than that of SLMS, but the heat-affected zone of LCMS along X axis is wider than that of SLMS under the same process parameters. 展开更多
关键词 电弧温度场 复合金属 弹性夹层 数值模拟 内容管理系统 板成形 血浆 等离子弧
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Experimental and simulation research on thermal stamping of carbon fiber composite sheet 被引量:4
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作者 张琦 高强 蔡进 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2014年第1期217-223,共7页
To improve the manufacture efficiency and promote the application of composites in the automobile industry, a new composite forming method, thermal stamping, was discussed to form composite parts directly. Experiments... To improve the manufacture efficiency and promote the application of composites in the automobile industry, a new composite forming method, thermal stamping, was discussed to form composite parts directly. Experiments on two typical stamping processes, thermal bending and thermal deep drawing, were conducted to investigate the forming behavior of composite sheets and analyze the influence of forming temperature on the formed composite part. Experimental results show that the locking angle for woven composite is about 30°. The bending load is smaller than 5 N in the stamping process and decreases with the increase of temperature. The optimal temperature to form the carbon fiber composite is 170 ℃. The die temperature distribution and the deformation of composite sheet were simulated by FEA software ABAQUS. To investigate the fiber movement of carbon woven fabric during stamping, the two-node three-dimension linear Truss unit T2D3 was chosen as the fiber element. The simulation results have a good agreement to the experimental results. 展开更多
关键词 thermal stamping carbon fiber composite sheet shear angle BENDING deep drawing
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Effect of Hot Processing Technology on Mechanical Properties and Structure of Interface of Ti/Steel Composite Sheet 被引量:6
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作者 关尚哲 刘润生 +1 位作者 范江峰 王小兵 《稀有金属快报》 CSCD 2005年第11期25-30,共6页
研究了热加工工艺对钛-钢复合板界面力学性能和显微组织的影响。测试了在A,B,C,D4种温度下热轧复合板界面的力学性能,用金相显微镜及扫描电镜观察了界面显微组织并分析了界面的成分。结果表明,在A,B2种温度下轧制的钛-钢复合板界... 研究了热加工工艺对钛-钢复合板界面力学性能和显微组织的影响。测试了在A,B,C,D4种温度下热轧复合板界面的力学性能,用金相显微镜及扫描电镜观察了界面显微组织并分析了界面的成分。结果表明,在A,B2种温度下轧制的钛-钢复合板界面机械性能良好,延伸率高,其剪切强度不但可保持坯料原有的水平,甚至还略有增加。在C,D2种温度下轧制的钛-钢复合板界面机械性能相对较低,延伸率较高,但剪切强度要比爆炸复合坯料低,尤其是D加热温度,轧制后界面剪切强度急剧下降。热轧的终轧温度也是影响钛-钢复合板界面结合性能的重要因素。在低于相转变温度的合适温区热轧,且终轧温度合适,获得的钛-钢复合板结合界面无爆炸波纹,没有污染,生产的脆性化合物极细小,组织类同于钛材完全退火的等轴组织。 展开更多
关键词 钛-钢复合板 热加工工艺 力学性能 金属间化合物
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Effects of hot deformation and in-situ ZrB2 particle on microstructure and tensile performance of AA7085 composite sheets
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作者 Jiang-jing Wu Xi-zhou Kai +1 位作者 Chuang Guan Yu-tao Zhao 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2024年第7期1778-1791,共14页
To provide a new idea to reduce anisotropy for sheets in the thickness direction by microstructure modification and,mean-while,maintain or even enhance tensile performance,the in-situ ZrB2 particle/AA7085 composite sh... To provide a new idea to reduce anisotropy for sheets in the thickness direction by microstructure modification and,mean-while,maintain or even enhance tensile performance,the in-situ ZrB2 particle/AA7085 composite sheets with thicknesses of 1,2,3,and 6 mm were investigated.The as-cast grain size was significantly refined by the heterogeneous nucleus of the ZrB2 particle.The microstructure results show that severe hot deformation converts as-cast disordered microstructure into a sequential microstructure by crushing the remanent phases and matrix into a fiber structure.After the solid solution and aging heat treatment,the composite sheets exhibit largely recrystallized grains compared with partially recrystallized grains in the matrix sheets,and weak or even free texture exists in the composite.The grain size in the composite sheets decreases with the increase in thickness reductions.For the thickness range of 1-3 mm,the composite sheets maintain a similar tensile per-formance as that in matrix sheets,while the strength and ductility in the 6-mm-thick composite sheet are improved. 展开更多
关键词 composite sheet Grain structure TEXTURE DISLOCATION Strengthening
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Electron Beam-Physical Vapor Deposited TiAl-based Laminated Composite Sheet with Nb Layer Toughening
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作者 ZHANG De-ming CHEN Gui-qing HAN Jie-cai MENG Song-he 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2006年第B12期5-8,共4页
The TiAl-based laminated composite sheet of 150 mm × 100 mm × 0.2 mm, with 24 TiAl layers and 23 Nb layers laid alternately one on another, was successfully fabricated using the electron beam-physical vapor ... The TiAl-based laminated composite sheet of 150 mm × 100 mm × 0.2 mm, with 24 TiAl layers and 23 Nb layers laid alternately one on another, was successfully fabricated using the electron beam-physical vapor deposition (EB-PVD) method. The microstructure and properties of the sheet were investigated on an atomic force microscope (AFM), a scanning electron microscope (SEM) and a tensile testing machine. The results indicate that the evenly distributed Nb layers are well joined with the TiAl layers, and the interfaces between layers are transparent, and every interlayer spacing is of about 8μm. The fractures appear to be a mixture of intergranular fractures and somewhat ductile quasi-cleavage ones. Despite its slight influence on ultimate tensile strength, the inserts of Nb layers efficiently increase the room temperature ductility of TiAl-based alloys due to the crack deflection effect. 展开更多
关键词 EB-PVD TiAl-based alloys sheet TiAl/Nb laminated composites microstructure and properties
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The development of advanced Cr-free organic composite coated electrogalvanized steel sheet with excellent grounding property
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作者 ZHANG Jianping Research Institute,Baoshan Iron & Steel Co.,Ltd.,Shanghai 201900,China 《Baosteel Technical Research》 CAS 2010年第S1期43-,共1页
In recent years,the concern about environmental protection is increasing on a world scale.Major manufacturers of home appliances and OA equipment have introduced so-called 'green procurement schemes' for reduc... In recent years,the concern about environmental protection is increasing on a world scale.Major manufacturers of home appliances and OA equipment have introduced so-called 'green procurement schemes' for reducing environmentally harmful substances in manufacturing process and end products. Under such background,a new type of chromate-free organic composite coated electro-galvanized steel sheet with high conductivity was developed by Baosteel,which meets the EU RoHS Directive(Restriction of the Hazardous Substances) and other related laws and regulations on environmental safety.It also provides excellent surface electrical conductivity,corrosion resistance,fingerprint resistance,solvent resistance,coating adhesion, heat resistance,formability and other special properties to meet the demand of manufacture's process of OA machine. Compared with previously developed anti-fingerprinting coated electro-galvanized steel sheet,this newly developed product has a good balance between high corrosion resistance(time to 5%white rust in salt spray test is 120 h for flat panel and 72 h for worked potion) and conductivity(surface electro-resistivity in accordance with LOREAST is less than 0.1 milliohm ) due to the special design of coating's structure.Besides,It also provides the properties of grounding and shielding against electromagnetic waves.The evaluation of surface performances of new product showed that it is comparable or even better than the similar products. Currently,the newly developed product has been commercialized. In this paper,the major properties are discussed,such as corrosion resistance,surface electrical conductivity, fingerprint resistance,solvent resistance,coating adhesion(ink/melamine alkyd paint),heat resistance and formability.Furthermore,the application is also briefly described. 展开更多
关键词 chromate-free thin organic composite coating conductivity corrosion resistance elecro-galvanized steel sheet
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Characteristics of deformation joining of aluminum-stainless steel composite sheet
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作者 李培武 孙康宁 +4 位作者 李爱民 李中友 刘秀忠 栾新民 徐秀丽 《中国有色金属学会会刊:英文版》 CSCD 2003年第6期1385-1388,共4页
In order to study the characteristics of deformation joining of aluminum-stainless steel composite sheet, an applied example of this composite sheet was given. The conditions of the composite sheet were discussed, the... In order to study the characteristics of deformation joining of aluminum-stainless steel composite sheet, an applied example of this composite sheet was given. The conditions of the composite sheet were discussed, the optical micrographs and scanning electron micrographs were examined by contrast ways of deformation joining and braze joining. Simultaneously the analysis of energy spectrum was also conducted. The results indicate that the deformation joining composite sheet possesses high bonding strength, good corrosion resistance, less inclusions and less microcracks. 展开更多
关键词 铝合金 不锈钢 复合板 变形特征 接头
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Fabrication, microstructure and properties of electron beam-physical vapor deposited TiAl sheet and TiAl/Nb laminated composites
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作者 韩杰才 章德铭 +2 位作者 陈贵清 孟松鹤 张幸红 《中国有色金属学会会刊:英文版》 CSCD 2006年第B02期449-452,共4页
The TiAl-based alloys sheet with 150 mm×100 mm×0.4 mm and the TiAl/Nb laminated composites with 150 mm×100 mm×0.2 mm were fabricated by using electron beam-physical vapor deposition(EB-PVD) method,... The TiAl-based alloys sheet with 150 mm×100 mm×0.4 mm and the TiAl/Nb laminated composites with 150 mm×100 mm×0.2 mm were fabricated by using electron beam-physical vapor deposition(EB-PVD) method, respectively. The microstructure and properties of the sheet were investigated by AFM, SEM and EDS. The results show that the TiAl based alloys sheet has a good surface quality, and its microstructure is columnar crystal. The component of the alloys indicates a regular and periodical gradient change which leads to the spontaneous delamination along the normal direction of substrate. In the TiAl/Nb laminated composites alternating overlaid by TiAl of 24 layers and Nb of 23 layers, the interface of each layer evenly distributed throughout the cross-section is transparent, and the interlayer spacing is about 8μm. The component of TiAl layers also changes regularly along the normal direction of substrate, but no delamination phenomenon is found. The TiAl/Nb laminated composites have better ductility than the TiAl-based alloys sheet. 展开更多
关键词 电子束汽相淀积 钛铝基合金板 TiAl/Nb层压复合材料 制备 性质 显微结构
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Fabrication and Characterization of Nano-CaCO_3/Polypropylene Foam Sheets 被引量:5
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作者 陈再良 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2007年第4期607-611,共5页
By applying the reinforcing and toughening effect of calcium carbonate (CaCO3) nanoparticles on polypropylene, foam sheets of good performance were successfully fabricated by extrusion. The equipment and conditions ... By applying the reinforcing and toughening effect of calcium carbonate (CaCO3) nanoparticles on polypropylene, foam sheets of good performance were successfully fabricated by extrusion. The equipment and conditions of the extrusion were explored. The mechanical properties of the produced foam sheets were tested. The effect of CaCO3 nano-particles on the mechanical properties and the cellular structure of the sheets was comprehensively studied. The experimental results show that the optimum content of CaCO3 nano-particles in the composite material was -4wt%. At this content, the nano-particles were well dispersed in the substrate, and the composite material had maximum tensile strength and impact strength. Surface treatment of the nano-particles only affected the impact strength of the composite material. CaCO3 micro-particles, on the other hand, showed little effect on the properties of the composite material when the micro-particles content was less than 5 wt%. At a content higher than 5wt%, the properties of the composite material significantly worsened. 展开更多
关键词 calcium carbonat POLYPROPYLENE foam sheet composite material cellular structure
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Fracture and Tensile Properties of Polyvinyl Alcohol Fiber Reinforced Cementitous Composites 被引量:3
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作者 徐世烺 GAO Shuling 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2008年第1期7-11,共5页
Experiments were carried out to design polyvinyl alcohol (PVA) fiber reinforced cementitous composites (PVA-FRCCs) holding high ductility and energy consumption ability. Besides, the properties of each ingredients... Experiments were carried out to design polyvinyl alcohol (PVA) fiber reinforced cementitous composites (PVA-FRCCs) holding high ductility and energy consumption ability. Besides, the properties of each ingredients in composites, mixing method and technology for fresh mixture were described in detail. Then, the pseudo-strain-hardening (PSH) behavior was investigated in uniaxial tension test. As a result, the maximum ultimate tensile strain can reach 0.7 percent. On the other hand, the single edge notch (SEN) thin sheet specimens were employed to gain the normal tensile load via crack mouth opening displacement (CMOD) curves, which can show obvious PSH behavior. In addition, the curves can be divided into four zones whose fracture toughness calculation methods were discussed. The wedge splitting (WS) test method can be applied to discuss the fracture toughness. Moreover, fracture energy of SEN and WS specimens were both approximately evaluated. 展开更多
关键词 pseudo-stain-hardening cementitious composites polyvinyl alcohol fiber single edge notch thin sheet wedge splitting fracture toughness
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Recent Developments in the Study on Oriented Silicon Steel Sheets 被引量:1
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作者 WANG Jun-an, LI Qiang, YAO Mei-yi, ZHOU Bang-xin Institute of Materials, School of Material Science and Engineering, Shanghai University,Shanghai 200072, China 《Advances in Manufacturing》 SCIE CAS 2000年第S1期161-164,共4页
Over the past several decades, the texture, properties and manufacture of quality silicon steels have been investigated for application in magnetic devices requiring magnetically soft materials, such as transformers, ... Over the past several decades, the texture, properties and manufacture of quality silicon steels have been investigated for application in magnetic devices requiring magnetically soft materials, such as transformers, inductive devices, etc. Most recently, the factors effecting the texture and magnetic properties, e.g. impurities, rolling process and annealing process, have been greatly studied. The benefits of this study are that low core loss silicon steels with stable high-performance can be obtained through an economic production process. This review is intended to summarize the recent developments in the texture, properties, manufacture and application of oriented silicon steel sheets. 展开更多
关键词 oriented silicon steel sheets RECRYSTALLIZATION TEXTURE compositION processing
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Mechanical properties and fracture mechanism of Fe/Cu composite sheets with Al interlayer after annealing treatment 被引量:1
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作者 Xiao-wei Feng Jia-xin Li +2 位作者 Zhi-bin Zheng Bo Feng Hao-kun Yang 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2023年第9期1888-1895,共8页
The feasibility of preparing Fe/Cu composite sheet was achieved by introducing submillimeter thickness Al sheet as an interlayer by rolling at room temperature.The shear test of the composite sheet supported that the ... The feasibility of preparing Fe/Cu composite sheet was achieved by introducing submillimeter thickness Al sheet as an interlayer by rolling at room temperature.The shear test of the composite sheet supported that the metallurgical bonding strength between Fe/(Al)/Cu interface was stronger than that of Cu sheet at the initial state.With further 300 or 600℃ annealing treatments,the interlayer subsequently exhibited brittle shear fracture,and the shear strength significantly dropped under the shear test.Furthermore,the tensile test pointed out that the tensile fracture mechanism changed from fracture as a whole structure to interlayer-to-layer delamination mode after annealing treatment.The microstructure and X-ray diffraction observations proved that the formation of Cu–Al intermetallic compounds(IMCs)along the interlayer resulted in brittle fracture,rather than that of Fe–Al IMCs after annealing,especially under 600℃ annealing treatment.The investigation of the effect of the rolling process and annealing treatment on the mechanical properties of the Fe/(Al)/Cu composite sheet shall provide instruction for high-quality composite metallic sheet fabrication. 展开更多
关键词 composite sheet Fe/Cu INTERLAYER Intermetallic compound FRACTURE
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Application of WC cermet sprayed composite coating in hot-dip galvanizing lines
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作者 YU Jilai Li Qingsheng WANG Lu 《Baosteel Technical Research》 CAS 2015年第1期8-12,共5页
With the rapid development of the automobile industry, the use of galvannealed and galvanized steel sheets in automobiles is on the rise. These sheets must meet very high surface quality requirements. The surface trea... With the rapid development of the automobile industry, the use of galvannealed and galvanized steel sheets in automobiles is on the rise. These sheets must meet very high surface quality requirements. The surface treatment of line rolls is known to have a great impact on strip quality. To prevent dusts such as zinc ash from pressing into the strip surface, we used a composite thermal spray surface treatment technique to treat rolls. The successfully developed tungsten carbide (WC) + Ni-P composite plating technology improved the quality of the tungsten carbide thermally sprayed WC roll surface. This technique is also helpful to control defects such as adhered foreign materials in hot-dip galvanized automobile outer panel surfaces. 展开更多
关键词 hot-dip galvanizing line automotive sheet WC composite thermal spraying process roll
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Preparation and Characterization of Reduced Graphene-P3HT Composite Thin Films for Use as Transparent Conducting Electrodes
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作者 Lam Minh Long Dang Dinh Long +3 位作者 Nguyen Phuong Hoai Nam Nguyen Trong Tinh Sergei Antonovic Chizhik Nguyen Nang Dinh 《Materials Sciences and Applications》 2018年第5期464-472,共9页
With the aim of producing simple and effective transparent conducting electrodes, the conducting polymer poly(3-hexylthiophene) (P3HT) incorporated with reduced graphene oxide film (rGO) (called rGO-P3HT) was prepared... With the aim of producing simple and effective transparent conducting electrodes, the conducting polymer poly(3-hexylthiophene) (P3HT) incorporated with reduced graphene oxide film (rGO) (called rGO-P3HT) was prepared by spin-coating method. Structural, electrical and optical characterization showed that rGO-P3HT films 9.0 wt% P3HT exhibited good stability when exposed to the ambient atmosphere. These composite films of 200 nm thickness possess a sheet resistance and transparency of R□~ 17Ω and T ~ 72%, respectively. Owing to containing conducting polymer, rGO-P3HT-coated glass could be efficiently used in photovoltaic applications, in organic solar cells in particular, with the replacement of the indium tin oxide (ITO) and fluorine tin oxide (FTO) electrodes. 展开更多
关键词 composite rGO-P3HT Thin Films TRANSPARENT CONDUCTING Electrode sheet Resistance TRANSMITTANCE
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Creep and Shrinkage Effects on the Bond-Slip Characteristics and Ultimate Strength of Composite Slabs
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作者 Alireza Gholamhoseini Ian Gilbert Mark Bradford 《Journal of Civil Engineering and Architecture》 2014年第9期1085-1097,共13页
Composite one-way concrete slabs with profiled steel sheeting as permanent formwork are commonly used in the construction industry. The steel sheeting supports the wet concrete of a cast-in-situ reinforced or post-ten... Composite one-way concrete slabs with profiled steel sheeting as permanent formwork are commonly used in the construction industry. The steel sheeting supports the wet concrete of a cast-in-situ reinforced or post-tensioned concrete slab and, after the concrete sets, acts as external reinforcement. In this type of slab, longitudinal shear failure between the concrete and the steel sheeting is the most common type of failure at the ultimate load stage. Design codes require the experimental evaluation of the longitudinal shear capacity of each type of steel decking using full-scale tests. This paper presents the results of the short-term testing up to failure of two types of profiled steel decking that are commonly used in the construction industry in Australia. Fourteen full-scale, simply-supported slabs were tested in four-point bending with shear spans of either span/4 or span/6. Four slabs were tested at age of 28 days and the other 10 slabs were subjected to drying shrinkage and various levels of sustained loads for a period of at least 6 months prior to testing to failure. The effects of creep and drying shrinkage on the load carrying capacity and deformation of the slabs at ultimate loads are presented and discussed. The bond-slip relationship of each slab is determined from the test data and the values of maximum longitudinal shear stress calculated using different methods are described and compared. 展开更多
关键词 composite slabs creep and shrinkage longitudinal shear stress partial interaction profiled steel sheeting.
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