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Journal of Minerals and Materials Characterization and Engineering 2011年第13期10卷 1263-1275页

作者： M.S. Sham Prasad C.S. Venkatesha T. Jayaraju Dept. of Industrial & Production Engineering National Institute of Engineering Mysore India Dept. of Mechanical Engineering National Institute of Engineering Mysore India Dept. of Mechanical Engineering U BDT college of Engineering Davangere India

Polymer composites is a typical material consisting of a matrix reinforced with fiber/filler and the general nature of construction of the material itself provides innumerable sites for the initiation of a defect or for the growth of delamination. The life expectancy of composite structure requires a clear understanding of the material’s response to the growth of interlaminar delamination under Mode I, Mode II, Mode III and Mixed Modes. Fracture testing of fiber reinforced polymer-matrix composites is an active area of research. Even though substantial progress in the area of fracture testing has been achieved, there are still several problems awaiting solution. The new aspects in the experimental studies of interlaminar and intralaminar fracture toughness of polymer matrix composites were emphasized in this review paper. The different modes to evaluate the fracture energy were listed and their suitability was mentioned.

关键词： Interlaminar Delamination Intralaminar Fracture toughness

Study on the bendability and toughness of a 1 500 MPa cold-rolled martensitic sheet steel

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Baosteel Technical Research 2016年第3期10卷 28-34页

作者： ZHU Xiaodong XUE Peng LI Wei ZHANG Hanlong Research Institute Baoshan Iron&Steel Co.Ltd.Shanghai 201900China State Key Laboratory of Development and Application Technology of Automotive Steels(Baosteel) Shanghai 201900China

Cold rolled martensitic sheet steels are achieving more and more applications in car-making because of their ultra-high strength and potential for weight reduction. The relatively low plasticity of ultra-high strength martensitic steels might be a drawback for the applications in the aspects of forming and safety protection function and should be significantly noted. A 1 500 MPa grade cold rolled martensitic sheet steel has been studied to investigate the bendability at 90 degree bending and impact toughness as well as fracture surface morphology at various temperatures. Some discussions have been made basing upon the experiment data to get some understanding on the performance of the materials under various conditions and on how to make use of this kind of ultra high strength steel properly.

关键词： cold rolled martensitic steel sheet bendability toughness

EFFECT OF CRACK DEPTH ON ROTATION FACTOR AND FRACTURE toughness OF WELDED JOINT

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Journal of Shanghai Jiaotong university(Science) 1997年第1期2卷 45-49页

作者：姚寿山

ＥＦＦＥＣＴＯＦＣＲＡＣＫＤＥＰＴＨＯＮＲＯＴＡＴＩＯＮＦＡＣＴＯＲＡＮＤＦＲＡＣＴＵＲＥＴＯＵＧＨＮＥＳＳＯＦＷＥＬＤＥＤＪＯＩＮＴＹａｏＳｈｏｕｓｈａｎ（姚寿山）（Ｄｅｐｔ．ｏｆｍａｔｅｒｉａｌｓＥｎｇｉｎｅｒｉ... 详细信息

ＥＦＦＥＣＴＯＦＣＲＡＣＫＤＥＰＴＨＯＮＲＯＴＡＴＩＯＮＦＡＣＴＯＲＡＮＤＦＲＡＣＴＵＲＥＴＯＵＧＨＮＥＳＳＯＦＷＥＬＤＥＤＪＯＩＮＴＹａｏＳｈｏｕｓｈａｎ（姚寿山）（Ｄｅｐｔ．ｏｆｍａｔｅｒｉａｌｓＥｎｇｉｎｅｒｉｎｇ，ＳｈａｎｇｈａｉＪｉａｏｔｏ...

关键词： fracture toughness CTOD weldments shallow crack rotation factor

Effects of Inclusions on the Microstructure and toughness of HAZ of HSLA Steels

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Effects of Inclusions on the Microstructure and Toughness of...

Excellent heat affected zone toughness technology improved by strong deoxidizers

技术创新与循环经济——第二届宝钢学术年会

作者： ZHENG Qing,CUI Jian (Baoshan Iron & Steel Co.,Ltd,Shanghai 201900,China)

Effects of inclusions on the microstructure and toughness of HAZ were evaluated in this paper. Fine inclusions were found to impose far more important impacts on the microstructure of HAZ rather than base *** the heat cycle of welding simulation,the presence of TiO inclusions retarded the coarsening of austenite grain and stimulated the transformation of austenite to intragranular ferrite,which is in interlocked acicular shape and is difficult for cleavage to propagate *** toughness of HAZ can thus be substantially *** type,size and distribution of inclusions can be controlled in the melting *** inclusions are available only by initially Ti-Killed conditions and some other elements of the steel are necessarily controlled.

关键词： inclusions HAZ toughness deoxiclization

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Baosteel Technical Research 2010年第4期4卷 32-36页

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 Metallurgical Process Division Research Institute Baoshan Iron & Steel Co. Ltd. Shanghai 201900 China Analysis & Testing Center Research Institute Baoshan Iron & Steel Co. Ltd. Shanghai 201900 China

Excellent heat affected zone(HAZ)toughness technology improved by strong deoxidizers(ETISI)technology has been developed by *** 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 *** 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 *** 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℃.

关键词： high-heat input welding heat affected zone toughness oxide metallurgy inclusions

HOT-PRESSED SILICON NITRIDE CERAMICS WITH HIGH FRACTURE toughness AT ELEVATED TEMPERATURES

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Chinese Science Bulletin 1988年第10期33卷 832-836页

作者：徐有仁黄莉萍来亭荣符锡仁严东生 Shanghii Institute of Ceramics Academia Sinica

Silicon nitride ceramics as structural materials for engines need a combination of both high strength and high fracture toughness at elevated temperatures. Several recent studies show that the rare-earth oxides additive can improve the high temperature strength of Si3N4, and the bend strength of Si3N4 with Y2O3, and La2O3 additives maintains from room temperature up to 1300℃. However, the effect of rareearth oxides on high temperature fracture toughness of Si3N4 has not yet been reported. In the present work, fracture toughness tests were performed at 20 to

关键词： toughness nitride additives tetragonal ceramics sintered Electron bending sintering elevated

Effect of microstructure on toughness of 9Cr-lMo deposited metal with varying heat inputs

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China Welding 2011年第2期20卷 46-50页

作者：王红鸿胡锋吴开明 Key Laboratory for Systems Science on Metallurgical Processing Wuhan University of Science and Technology Wuhan 430081.

The microstractures of 9Cr-lMo multipass deposited metal were observed. The effect of microstructure on impact toughness of 9Cr-lMo multipass deposited metal with varying heat inputs was investigated. Result shows that fine-grained microstructure occurs in reheated zones. The absorbed energy increases with the increase of volume fraction of fine-grained microstructure , suggesting that the volume fraction of fine-grained microstracture influences directly on impact toughness. The increasing ratio of fine-grained zone thickness to weld layer thickness is responsible for improving impact toughness after PWHT.

关键词： fine-grained microstructure toughness 9Cr-lMo muhipass deposited metal

Effect of Grain Size of β-Si_3N_4 and Glassy Phase on Strength and Fracture toughness of In-Situ Toughened Si_3N_4

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High Technology Letters 1996年第2期2卷 84-88页

作者：罗学涛 Department of Materials Science and Engineering Northwestern Polytechnical UniversityXi'an 710012P.R.China

An in-situ toughened Si3N4 ceramic is obtained by *** flexural strength andfracture toughness are 960MPa,12.74MPa·m1/2at room temperature and 720MPa,23.94MPa·msub>1/2at 1350℃,*** relation between grain size of β-Si3N4 and mechanicalproperties is *** glassy phase containing Y and La plays an important role inincreasing high-temperature mechanical properties because of its high viscosity and *** deflection,crack branching and pullout of rodlike β-Si3N4 grains are ob-served in this material by SEM,and the toughening mechanisms are discussed.

关键词： Si3N4 In-situ toughening Microstructure Strength Fracture toughness

The effect of different cooling and tempering conditions on the strength and toughness of SA533B steel

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Baosteel Technical Research 2014年第2期8卷 26-30页

作者： LIU Huibin ZHANG Hanqian Research Institute Baoshan Iron & Steel Co.Ltd

The microstmcture and mechanical properties of SA533B low-alloy steel were investigated under different cooling and tempering conditions. Steel plates cooled at 40℃/s and 25℃/min,exibited microstructures of auto-tempered martensite and bainite, respectively. During tempering, the strength of steels quenched at the two different cooling rates decreased continuously with an increase in the tempering parameter, which is defined by T （20 ＋ log t）, where T is the temperature and t is the holding time. However, the rate of change of the strength scales with the degree to which the virgin microstructure deviates from equilibrium. The strength of the martensitic steel decreased faster and finally obtained a value close to that of the bainitic steel. The ductility and toughness gradually improved during tempering, passed through a maximum value, and finally diminished. The level of maximum toughness was also found to depend on the cooling rates of SA533B steel. The high cooling rate with a microstructure of auto-tempered martensite exhibited a larger toughness and a lower ductile-brittle transition temperature than the low cooling rate with a microstructure of bainite, because the former had finer precipitated cementite particles at quenching and a slower coarsing rate during tempering.

关键词： SA533B steel cooling rate tempering strength toughness

Effects of Sepiolite Mineral Nano-fiber on Strength and toughness of Ceramics

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Effects of Sepiolite Mineral Nano-fiber on Strength and Toug...