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Constructing high-toughness polyimide binder with robust polarity and ion-conductive mechanisms ensuring long-term operational stability of silicon-based anodes
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作者 Yongjun Kang Nanxi Dong +5 位作者 Fangzhou Liu Daolei Lin Bingxue Liu Guofeng Tian Shengli Qi Dezhen Wu 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2024年第6期580-591,I0014,共13页
Silicon-based materials have demonstrated remarkable potential in high-energy-density batteries owing to their high theoretical capacity.However,the significant volume expansion of silicon seriously hinders its utiliz... Silicon-based materials have demonstrated remarkable potential in high-energy-density batteries owing to their high theoretical capacity.However,the significant volume expansion of silicon seriously hinders its utilization as a lithium-ion anode.Herein,a functionalized high-toughness polyimide(PDMI) is synthesized by copolymerizing the 4,4'-Oxydiphthalic anhydride(ODPA) with 4,4'-oxydianiline(ODA),2,3-diaminobenzoic acid(DABA),and 1,3-bis(3-aminopropyl)-tetramethyl disiloxane(DMS).The combination of rigid benzene rings and flexible oxygen groups(-O-) in the PDMI molecular chain via a rigidness/softness coupling mechanism contributes to high toughness.The plentiful polar carboxyl(-COOH) groups establish robust bonding strength.Rapid ionic transport is achieved by incorporating the flexible siloxane segment(Si-O-Si),which imparts high molecular chain motility and augments free volume holes to facilitate lithium-ion transport(9.8 × 10^(-10) cm^(2) s^(-1) vs.16 × 10^(-10) cm^(2) s~(-1)).As expected,the SiO_x@PDMI-1.5 electrode delivers brilliant long-term cycle performance with a remarkable capacity retention of 85% over 500 cycles at 1.3 A g^(-1).The well-designed functionalized polyimide also significantly enhances the electrochemical properties of Si nanoparticles electrode.Meanwhile,the assembled SiO_x@PDMI-1.5/NCM811 full cell delivers a high retention of 80% after 100 cycles.The perspective of the binder design strategy based on polyimide modification delivers a novel path toward high-capacity electrodes for high-energy-density batteries. 展开更多
关键词 Polyimide binder high toughness Robust ionic transport Silicon-based anodes Lithium-ion batteries
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Product Development of High Strength and Toughness Spring Flat Steel
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作者 Jianxin Wang Chunhui Zhang 《Frontiers of Metallurgical Industry》 2024年第1期15-18,共4页
With the continuous development of mechanical industry,higher requirements are put forward for the comprehensive properties of spring steel.The chemical composition and production process of spring flat steel are desi... With the continuous development of mechanical industry,higher requirements are put forward for the comprehensive properties of spring steel.The chemical composition and production process of spring flat steel are designed to meet the requirements of high strength and high toughness of spring flat steel,through the test,the product surface quality and internal quality all meet the national standards,the performance indicators to meet user requirements. 展开更多
关键词 spring flat steel mechanical properties high strength high toughness
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Effect of microstructure on the low temperature toughness of high strength pipeline steels 被引量:10
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作者 Yan-ping Zeng Peng-yu Zhu Ke Tong 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2015年第3期254-261,共8页
Microstructure observations and drop-weight tear test were performed to study the microstructures and mechanical properties of two kinds of industrial X70 and two kinds of industrial X80 grade pipeline steels. The eff... Microstructure observations and drop-weight tear test were performed to study the microstructures and mechanical properties of two kinds of industrial X70 and two kinds of industrial X80 grade pipeline steels. The effective grain size and the fraction of high angle grain boundaries in the pipeline steels were investigated by electron backscatter diffraction analysis. It is found that the low temperature toughness of the pipeline steels depends not only on the effective grain size, but also on other microstructural factors such as martensite-austenite (MA) constituents and precipitates. The morphology and size of MA constituents significantly affect the mechanical properties of the pipeline steels. Nubby MA constituents with large size have significant negative effects on the toughness, while smaller granular MA constituents have less harmful effects. Similarly, larger Ti-rich nitrides with sharp corners have a strongly negative effect on the toughness, while fine, spherical Nb-rich carbides have a less deleterious effect. The low temperature toughness of the steels is independent of the fraction of high angle grain boundaries. 展开更多
关键词 high strength pipe steels microstrucmre low temperature toughness influencing factors
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Mechanics Behavior of Ultra High Toughness Cementitious Composites after Freezing and Thawing 被引量:9
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作者 徐世烺 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2010年第3期509-514,共6页
Mechanical behaviors of UHTCC after freezing and thawing were investigated,and compared with those of steel fiber reinforced concrete(SFRC),air-entrained concrete(AEC) and ordinary concrete(OC).Four point bendin... Mechanical behaviors of UHTCC after freezing and thawing were investigated,and compared with those of steel fiber reinforced concrete(SFRC),air-entrained concrete(AEC) and ordinary concrete(OC).Four point bending tests had been applied after different freezing-thawing cycles(0,50,100,150,200 and 300 cycles,respectively).The results showed that residual flexural strength of UHTCC after 300 freezing-thawing cycles was 10.62 MPa(70% of no freezing thawing ones),while 1.58 MPa(17% of no freezing thawing ones) for SFRC.Flexural toughness of UHTCC decreased by 17%,while 70% for SFRC comparatively.It has been demonstrated experimentally that UHTCC without any air-entraining agent could resist freezing-thawing and retain its high toughness characteristic in cold environment.Consequently,UHTCC could be put into practice for new-built or retrofit of infrastructures in cold regions. 展开更多
关键词 ultra high toughness cementitious composites cyclic freezing and thawing flexural strength multiple cracking flexural toughness
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Uniaxial Compressive Properties of Ultra High Toughness Cementitious Composite 被引量:4
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作者 蔡向荣 徐世烺 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2011年第4期762-769,共8页
Uniaxial compression tests were conducted to characterize the main compressive performance of ultra high toughness cementitious composite (UHTCC) in terms of strength and toughness and to obtain its stress-strain re... Uniaxial compression tests were conducted to characterize the main compressive performance of ultra high toughness cementitious composite (UHTCC) in terms of strength and toughness and to obtain its stress-strain relationships. The compressive strength investigated ranges from 30 MPa to 60 MPa. Complete stress-strain curves were directly obtained, and the strength indexes, including uniaxial compressive strength, compressive strain at peak stress, elastic modulus and Poisson's ratio, were calculated. The comparisons between UHTCC and matrix were also carried out to understand the fiber effect on the compressive strength indexes. Three dimensionless toughness indexes were calculated, which either represent its relative improvement in energy absorption capacity because of fiber addition or provide an indication of its behavior relative to a rigid-plastic material. Moreover, two new toughness indexes, which were named as post-crack deformation energy and equivalent compressive strength, were proposed and calculated with the aim at linking up the compressive toughness of UHTCC with the existing design concept of concrete. The failure mode was also given. The study production provides material characteristics for the practical engineering application of UHTCC. 展开更多
关键词 ultra high toughness cementitious composite compressive strength compressive toughness fiber reinforcement
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Flexural response of reinforced concrete beams strengthened with post-poured ultra high toughness cementitious composites layer 被引量:6
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作者 王楠 徐世烺 《Journal of Central South University》 SCIE EI CAS 2011年第3期932-939,共8页
Four-point bending tests were conducted up to failure on eleven reinforced concrete (RC) beams and strengthening beams to study the effectiveness of externally pouring ultra high toughness cementitious composites (UHT... Four-point bending tests were conducted up to failure on eleven reinforced concrete (RC) beams and strengthening beams to study the effectiveness of externally pouring ultra high toughness cementitious composites (UHTCC) on improving the flexural behavior of existing RC beams.The strengthening materials included UHTCC and high strength grade concrete.The parameters,such as thickness and length of strengthening layer and reinforcement in post-poured layer,were analyzed.The flexural behavior,failure mode and crack propagation of composite beams were investigated.The test results show that the strengthening layer improves the cracking and ultimate load by increasing the cross section area.Introducing UHTCC material into strengthening not only improves the bearing capacity of the original specimens,but also disperses larger cracks in upper concrete into multiple tightly-spaced fine cracks,thus prolonging the appearance of harm surface cracks and increasing the durability of existing structures.Compared with post-poured concrete,UHTCC is more suitable for working together with reinforcement.The load?deflection plots obtained from three-dimensional finite-element model (FEM) analyses are compared with those obtained from the experimental results,and show close correlation. 展开更多
关键词 ultra high toughness cementitious composities strengthening beams flexural behavior post-poured layer
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Mechanical properties and grain refinement by acicular ferrite in high strength high toughness weld metal 被引量:2
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作者 雷玄威 王红鸿 +1 位作者 吴开明 于磊 《China Welding》 EI CAS 2016年第1期71-76,共6页
The volume fraction and morphology of acicular ferrite evolution in a high strength high toughness weld metal were studied and the mechanical properties of weld metal under heat input of 21 kJ/cm with and without fast... The volume fraction and morphology of acicular ferrite evolution in a high strength high toughness weld metal were studied and the mechanical properties of weld metal under heat input of 21 kJ/cm with and without fast cooling were tested. The results show the weld metal can obtain a large proportion of acicular ferrite during a wide range of cooling rate and the sizes of acicular ferrite in length and thickness decrease with cooling rate increasing. The weld metal exhibited high tensile strength (895 MPa and 870 MPa) and good low temperature toughness (average AKv-30℃ 104 J and 79. 2 J). The higher tensile strength and better low temperature toughness of the weld metal under fast cooling are due to the more refined grain of acicular ferrite. 展开更多
关键词 acicular ferrite high toughness weld metal mechanical properties
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EFFECT OF WELDING THERMAL CYCLE ON THE MICROSTRUCTURE AND TOUGHNESS OF LOW ALLOY HIGH STRENGTH STEEL 被引量:1
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作者 C.S.Hu1,2) and Y.X.Gu3) 1) Department of Mechanical Engineering ,Fushun Petroleum Institute,Fushun 113001 ,China 2) State Key Laboratory for Corrosion and Protection ,Institute of Corrosion and Protection of Metal, The Chi nese Academy of Science,She 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 1999年第4期626-629,共4页
Weldingthermalcyclicsimulated techniquesisemployed in thestudy. By meansof analysismetalloscope, fracture morphology and impact toughness test of the sample, the effect ofweldingthermalcycle peak temperature and dualt... Weldingthermalcyclicsimulated techniquesisemployed in thestudy. By meansof analysismetalloscope, fracture morphology and impact toughness test of the sample, the effect ofweldingthermalcycle peak temperature and dualthermal cycle on the micro structure and toughnessoflow alloy high strength steel HQ100 isinvestigated.Inner fine martensitic andbainitic microstrctureisobservedby TEM.Theresultsshow that withtheincreaseof peaktem perature, grain sizesbecomelarger,theimpacttoughness drop down .Ifthermalcycleisim posed twiceand dualthermalcyclicpeaktemperatureis1275 ℃+ 750 ℃,theimpacttoughnessisatthelowest value.Alsotheimpacttoughnessagrees withthefracture morphology. 展开更多
关键词 thermalcycle peaktemperature high strengthsteel MICROSTRUCTURE and toughness
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Dynamic fracture toughness of high strength metals under impact loading:increase or decrease 被引量:5
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作者 Ze-Jian Xu Yu-Long Li 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2011年第4期559-566,共8页
An elusive phenomenon is observed in previous investigations on dynamic fracture that the dynamic fracture toughness (DFT) of high strength metals always increases with the loading rate on the order of TPa.m1/2.s-1.... An elusive phenomenon is observed in previous investigations on dynamic fracture that the dynamic fracture toughness (DFT) of high strength metals always increases with the loading rate on the order of TPa.m1/2.s-1. For the purpose of verification, variation of DFT with the loading rate for two high strength steels commonly used in the aviation industry, 30CrMnSiA and 40Cr, is studied in this work. Results of the experiments are compared, which were conducted on the modified split Hopkinson pressure bar (SHPB) apparatus, with striker velocities ranging from 9.2 to 24.1 m/s and a constant value of 16.3 m/s for 30CrMnSiA and 40Cr, respectively. It is observed that for 30CrMnSiA, the crack tip loading rate increases with the increase of the striker velocity, while the fracture initiation time and the DFT simultaneously decrease. However, in the tests of 40Cr, there is also an increasing tendency of DFT, similar to other reports. Through an in-depth investigation on the relationship between the dynamic stress intensity factor (DSIF) and the loading rate, it is concluded that the generally increasing tendency in previous studies could be false, which is induced from a limited striker velocity domain and the errors existing in the experimental and numerical processes. To disclose the real dependency of DFT on the loading rate, experimentsneed to be performed in a comparatively large striker velocity range. 展开更多
关键词 Dynamic fracture. Fracture toughness Loadingrate effect - Hopkinson pressure bar high strength metal
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Effect of Plastic Deformation and H_2S on Dynamic Fracture Toughness of High Strength Casing Steel 被引量:1
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作者 曾德智 ZHANG Naiyan +3 位作者 TIAN Gang HU Junying ZHANG Zhi SHI Taihe 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2015年第2期397-403,共7页
The effects of plastic deformation and H2 S on fracture toughness of high strength casing steel(C110 steel) were investigated. The studied casing specimens are as follows: original casing, plastic deformation(PD)... The effects of plastic deformation and H2 S on fracture toughness of high strength casing steel(C110 steel) were investigated. The studied casing specimens are as follows: original casing, plastic deformation(PD) casing and PD casing after being immersed in NACE A solution saturated with H2S(PD+H2S). Instrumented impact method was employed to evaluate the impact behaviors of the specimens, meanwhile, dynamic fracture toughness(JId) was calculated by using Rice model and Schindler model. The experimental results show that dynamic fracture toughness of the casing decreases after plastic deformation. Compared with that of the original casing and PD casing, the dynamic fracture toughness decreases further when the PD casing immersed in H2 S, moreover, there are ridge-shaped feature and many secondary cracks present on the fracture surface of the specimens. Impact fracture mechanism of the casing is proposed as follows: the plastic deformation results in the increase of defect density of materials where the atomic hydrogen can accumulate in reversible or irreversible traps and even recombine to form molecular hydrogen, subsequently, the casing material toughness decreases greatly. 展开更多
关键词 sour gas fields high strength casing C110 steel plastic deformation H2S fracture toughness
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Effect of Zr-Ti combined deoxidation on impact toughness of coarse-grained heat-affected zone with high heat input welding
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作者 万响亮 吴开明 +2 位作者 王红鸿 卢伟煜 成林 《China Welding》 EI CAS 2014年第4期56-62,共7页
In this study, the effects of Zr-Ti combined deoxidation and AI deoxidation on the impact toughness of coarse- grained heat-affected zone in high-strength low-alloy steels were investigated. More fine oxides were form... In this study, the effects of Zr-Ti combined deoxidation and AI deoxidation on the impact toughness of coarse- grained heat-affected zone in high-strength low-alloy steels were investigated. More fine oxides were formed in the Zr-Ti-killed steel than in Al-killed steel. It was also found that more acicular ferrite grains were formed in the coarse-grained heat-affected zone in the Zr-Ti-killed steel than in Al-killed steel. The impact toughness of coarse-grained heat-affected zone of Zr-Ti-kiUed steel was higher than that of Al-killed steel. The good impact toughness was attributable to the pinning effect of fine oxides and the formation of acicular ferrite grains on fine oxides. 展开更多
关键词 STEELS heat-affected zone high heat input welding toughness DEOXIDATION
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Effect of B_(2)O_(3) enrichment on microstructural inhomogeneity of high strength steel weldments
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作者 Joydeep Roy Pritam Das 《China Welding》 CAS 2024年第3期25-32,共8页
The present work attributes the role of boron on the high strength steel submerged arc weld using an undermatching filler wire.Mild steel filler wire was used for welding in constant machine parameters setting to eval... The present work attributes the role of boron on the high strength steel submerged arc weld using an undermatching filler wire.Mild steel filler wire was used for welding in constant machine parameters setting to evaluate the joint strength due to the enrichment of boron.To change the chemical composition of the weld metal,boron trioxide powder was blended with virgin flux in various proportions(2.5%−12.5%),which led to an increase in boron weight percentage in the range of 0−0.0065.The results show that weld metals(WM)optical micrographs depict the various types of ferrites,pearlites and secondary phases like martensite-austenite(M-A).Acicular ferrite content was influenced by the boron trioxide addition.Heat affected zone(HAZ)micrographs were not showing appreciable changes with oxide enrichment.Hardness and toughness of weld metals showed the mixed trend with B_(2)O_(3) enrichment whereas,small reduction in ultimate tensile strength(UTS)and yield strength(YS)was observed. 展开更多
关键词 high strength steel B_(2)O_(3) flux microstructure HARDNESS toughness ultimate tensile strength
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Low temperature impact toughness of laser hybrid welded joint of high strength low alloy steel
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作者 倪加明 李铸国 +2 位作者 黄坚 倪慧峰 吴毅雄 《China Welding》 EI CAS 2011年第3期1-5,共5页
High strength low alloy steel with 16 mm thickness was welded by using high power laser hybrid welding. Microstrueture was characterized by using optical microscopy, scanning electron microscopy ( SEM ) , transmissi... High strength low alloy steel with 16 mm thickness was welded by using high power laser hybrid welding. Microstrueture was characterized by using optical microscopy, scanning electron microscopy ( SEM ) , transmission electron microscopy (TEM) and selected area electron diffraction (SAED). Low temperature impact toughness was estimated by using Charpy V-notch impact samples selected from the upper part and the lower part at the same heterogeneous joint. Results show that the low temperature impact absorbed energies of weld metal are (202,180,165 J) of upper samples and (178,145,160 J) of lower samples, respectively. All of them increase compared to base metal. The embrittlement of HAZ does not occur. Weld metal primarily consists of refined carbide free bainite and a little granular bainite since laser hybrid welding owns the character of low heat input. Retained austenite constituent film "locates among the lath structure of bainitie ferrite. Refined bainitic ferrite lath and retained austenite constituent film provide better low temperature impact toughness compared to base metal. 展开更多
关键词 laser hybrid welding high strength low alloy steel low temperature impact toughness carbide free bainite retained austenite constituent film
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Fabrication of High Toughness Silk Fibroin/Tungsten Disulfide Nanoparticles Hybrid Fiber and Self-Heating Textile by Wet Spinning|
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作者 Jianjun Guo Lingling Jia +5 位作者 Sandra Senyo Fometu Qiang Ma Jinjin Wang Hang Li Lei Jiang Guohua Wu 《Journal of Renewable Materials》 SCIE EI 2022年第12期3373-3389,共17页
Traditionally,silkworm silk has been used to make high-quality textiles.Nevertheless,various wastes from silk-worm silk textiles that are no longer used are increasing.which is also causing considerable waste and cont... Traditionally,silkworm silk has been used to make high-quality textiles.Nevertheless,various wastes from silk-worm silk textiles that are no longer used are increasing.which is also causing considerable waste and contam-ination.This issue is causing widespread concern in countries that use more silk.Regenerated silk fibroin(RSF)fibers have been shown to be fragile and tender,which prohibits RSF from being widely used as a structural com-ponent.Therefore,enriching the function of silk and enhancing the RSF mechanial properties are important directions to expand the comprehensive utilization of silk products.In the present research,wet spinning was used to create a series of RSF/tungsten disulfide(WS_(2))nanoparticles(NPs)hybrid fiber having distinct WS_(2) nanoparticles concentrations.It was discovered that the temperature of hybrid fibers containing 0.8 wt%RSF/WS_(2) nanoparticles might climb from 20.4℃ to 85.6℃in 1 min and 108.3℃ in 10 min after being exposed to simulated sunlight for a period of one minute and ten minutes.It also had certain antibacterial activity and thermal stability.Fabrics created by hand mixing had outst anding photothermal characteristics under natural sunlight.Further-more,adding WS_(2) nanoparticles might increase the tensile properties of hybrid fibers,which could be caused by the reality that the blending of WS_(2) nanoparticles inhibited the self-assembly of sheets in RSF reaction mixture in a dosage dependent way,as evidenced by the fact that RSF/WSz nanoparticles hybrid fibers had lesser β-sheets material,crystalline nature,and arystalline size.The above performance makes the RSF/WS_(2) nanoparticles hybrid fbers promising candidates for application in photothermal fabrics as well as military dothing. 展开更多
关键词 Smart textile wet spinning high toughness photother mal conversion regenerated silk fibroin
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Development of the High Toughness Spirally Submerged Arc Welded Pipe Line
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作者 Li Genquan(Baoji Welded Pipe Research Institute, CNPC) 《China Oil & Gas》 CAS 1995年第4期35-37,共3页
DevelopmentoftheHighToughnessSpirallySubmergedArcWeldedPipeLine¥LiGenquan(BaojiWeldedPipeResearchInstitute,C... DevelopmentoftheHighToughnessSpirallySubmergedArcWeldedPipeLine¥LiGenquan(BaojiWeldedPipeResearchInstitute,CNPC)Keywords:Pipe... 展开更多
关键词 PIPE line. high. toughness. SUBMERGED ARC WELDING
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A New Method for Determining J_(IC) of High StrengthHigh Fracture Toughness Steels by SingleThree Point Bend Specimen
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作者 Ping GENG M.K.Tseng and Cunfu QIAN (College of Science, Northeastern University, Shenyang 110006, China) 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 1998年第4期377-379,共3页
A single three point bend specimen compliance method for determining JIC of high strength high fracture toughness steels is presented and a formula for calculatinff J-integral is proposed as follows.It is simple and v... A single three point bend specimen compliance method for determining JIC of high strength high fracture toughness steels is presented and a formula for calculatinff J-integral is proposed as follows.It is simple and valid for high strength high fracture toughness steels. The values of JIC and KIC measured by this method are in good agreement with those measured by standard test method. 展开更多
关键词 of high Strengthhigh Fracture toughness Steels by SingleThree Point Bend Specimen A New Method for Determining J IC
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Preparation of Self-compacting Ultra-high Toughness Cementitious Composite
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作者 张秀芳 徐世烺 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2011年第4期754-761,共8页
A self-compacting ultra-high toughness cementitious composite (UHTCC) reinforced by discontinuous short polyvinyl alcohol (PVA) fibers, which exhibits self-compacting performance in the fresh state and strain-hard... A self-compacting ultra-high toughness cementitious composite (UHTCC) reinforced by discontinuous short polyvinyl alcohol (PVA) fibers, which exhibits self-compacting performance in the fresh state and strain-hardening and multiple cracking behavior in the hardened state, was developed through controlling flow properties of fresh mortar matrix at constant ingredients concentrations determined by micromechanical design and ensuring uniform fibers dispersion. The superplasticizer was utilized to adjust its flow properties in the fresh state. A series of flow tests, including deformability test, flow rate test, and self-placing test, were conducted to characterize and quantify the fluidity performance of fresh mortar matrix and self-compactability of fresh UHTCC. It is revealed that the utilization of superplasticizer is efficient in producing the fresh mortar matrix with desirable fluidity and the resulting self-compacting UHTCC. In addition, results of four point bending tests on the developed self-compacting UHTCC confirm the insensitivity of mechanical performance of self-compacting UHTCC to the presence of external vibrations as well as the flexural characteristics of deformation hardening and multiple cracking. 展开更多
关键词 SELF-COMPACTING ultra-high toughness cementitious composite (UHTCC) flow property STRAIN-HARDENING multiple cracking
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Progress in the technological development of oxide metallurgy for manufacturing steel plates with excellent HAZ toughness 被引量:10
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作者 Yang Jian Zhu Kai Wang Guodong 《Baosteel Technical Research》 CAS 2008年第4期43-50,共8页
In the present study, the market needs for the (HAZ) toughness are analyzed, and the mechanism of the development of steel plates with excellent heat affected zone decrease in the HAZ toughness during high-heat inpu... In the present study, the market needs for the (HAZ) toughness are analyzed, and the mechanism of the development of steel plates with excellent heat affected zone decrease in the HAZ toughness during high-heat input welding is discussed.The important countermeasure for improving the HAZ toughness is to employ the technology of oxide metallurgy ,namely,to make use of fine inclusion particles for improving the microstructure of HAZ. The progress and theories of oxide metallurgy technologies developed in the Nippon Steel Corporation ( NSC), the JFE Steel Corporation and the Kobe Steel Group are illustrated. Steel plates developed by these three companies with excellent HAZ toughness are introduced. 展开更多
关键词 high-heat input welding HAZ toughness steel plates oxide metallurgy fine particles INCLUSIONS
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Excellent heat affected zone toughness technology improved by strong deoxidizers 被引量:3
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作者 YANG Jian1),ZHU Kai1),WANG Ruizhi1),ZHANG Yi2)and SHEN Jianguo1)1)Metallurgical Process Division,Research Institute,Baoshan Iron & Steel Co.,Ltd.,Shanghai 201900,China2)Analysis & Testing Center,Research Institute,Baoshan Iron & Steel Co.,Ltd.,Shanghai 201900,China 《Baosteel Technical Research》 CAS 2010年第4期32-36,共5页
Excellent heat affected zone(HAZ)toughness technology improved by strong deoxidizers(ETISI)technology has been developed by Baosteel.In the deoxidation process of molten steel by adding strong deoxidizers,the formatio... Excellent heat affected zone(HAZ)toughness technology improved by strong deoxidizers(ETISI)technology has been developed by Baosteel.In the deoxidation process of molten steel by adding strong deoxidizers,the formation of micrometer inclusions and nano-meter precipitates in steel plates can be effectively controlled by a precise control of oxygen concentration.In the welding process with a high-heat input,the formation of acicular ferrite can be selectively promoted with the aid of the micrometer inclusions;the growth of γ grains can also be selectively restrained by the pinning effect of the nano-meter precipitates.After welding with a high-heat input of 400 kJ/cm,excellent HAZ toughness can be obtained in the steel plates with both of the above microstructures,and the average absorbed energy is greater than 200 J for the V-notch Charpy impact test at-20℃. 展开更多
关键词 high-heat input welding heat affected zone toughness oxide metallurgy INCLUSIONS
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Improvement of Toughness of UHMWPE/PP Blends
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作者 Feixiang Guo Hao Jiang +1 位作者 Hui Lü Yanhua Yin 《Journal of Beijing Institute of Technology》 EI CAS 2019年第3期667-674,共8页
Ultra-high molecular weight polyethylene (UHMWPE) was blended with polypropylene (PP) in order to ensure good processing. Inorganic rigid particles were also used to toughen UHMWPE/PP blends. CaCO3 and a compound addi... Ultra-high molecular weight polyethylene (UHMWPE) was blended with polypropylene (PP) in order to ensure good processing. Inorganic rigid particles were also used to toughen UHMWPE/PP blends. CaCO3 and a compound additive containing heat mixed polyethylene glycol 2000 and white diatomite were added to the blends. The crystalline, surface morphology and mechanical properties of the blends were investigated comprehensively. The toughness of the material is effectively improved. By contrast, the compound additive had a better result. When the content of additive was 15%, the elongation at the break increased by 279.2% and the fracture energy increased by 343.8% compared to the original samples. 展开更多
关键词 ultra-high molecular weight polyethylene (UHMWPE) INORGANIC FILLER toughness
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