Dynamic yield strength of a low carbon steel has been studied at differenttemperatures and strain rates.Two regions in which yield strength exhibits a different re-sponse to strain rates were found at the range of strain rate from 10~(-4)to 10~2,that is t

70/30 brass is rolled in single direction with different rolling reductions.Three dimentional orientation distribution function is utilized to analysis the macroscopicstatistic unsymmetric textures.According to the state of received shear force,a formatio

Microstructures and mechanical properties of a low alloyed high speed steelW3Mo2Cr4VSi have been investigated,and relationships among the compositon,themicrostructures and mechanical properties are discussed in detail.The experimental resultsshow that the

The strength at elevated temperature is one of the most important proper-ties of hot-working tool steel.The changes of the strength with temperature are obviouslydivided into two stages.This phenomenon is described by a phenomenlogical theory.Theresults s

The mechanical properties of pure aluminum,Al-1Li and Al-2.5Li alloyshave been investigated from room temperature to 77K.The ultimate tensile strength andelongation increased much with the decrease of test temperature,whereas the yieldstrengths show a sli

Deformation behavior near the crack-tip of bulk Fe—3%Si single crystalhas been observed by in-situ deformation and etch-pit method.It has been found thatthere is indeed a dislocation-free zone between the crack-tip and plastic zone.The size ofDFZ and the

The dynamic microprocesses of fracture in granular bainite were observedby the in-situ technique in SEM equipped with tensile platform.The expression about thepartition of strain in dual phase structures was derived.The affecting factors on ductility indu

Inthis paper,dynamic recovery behaviors of low carbon Mn-B steel within mediumtemperature austenite range were studied.Based on the characteristics of dynamic recovery in focmetal,the expression for stress—strain curve describing the thermomechanical proc

Based on the point of view of mechanics,the cracking analysis ofmicrostructure in dual phase materials was analyzed,the concept of equal strengtth designand its equation were introduced,and the critical length(l_0) of martensite phase inF(ferrite)-M(marte

This paper covers the set-up of high temperature corrosion quartz springscales whose sensitivity is 1.2x10~(-5)g,and studies on the corrosion behaviors of 20~# steel inH_2S-HCl-H_2O gas mixtures(H_2S 100—500ppm;HCl 50—250ppm;H_2O 130—540ppm)at 310 and 360

According to fractal method,the present paper analyses the relation between fractal dimen-sion and tensile property on the condition of tensile test,and discusses the influences of microstructures onfractal dimensions.The paper also compares the relation

The luminophors of silicates Li_(0.5)MAl_(0.5)SiO_4:Eu,Bi(M=Mg,Ca,Sr,Ba)weresynthesized and luminescence properties of Bi~(3+)and Eu~(3+)ions were studied.The effects andregularities of M(Ⅱ)ions on the luminescence of Eu~(3+)and Bi~(3+)ions were also inve

Vanadium dioxide exhibits a thermally-induced reversiblesemiconductor-to-metal phase transition near 67℃.In the present work,VO_2 thin filmshave been prepared by the Sol-Gel dip-coating technique on monocrystalline Si(111),silica glass and soda-lime-silic

Based on the fractal geometry,the fractal Brownian model of the secondaryelectron image is founded and the quantitative measure of the 3-D micro-morphology ofgraphites is proposed by using digital image processing(DIP)system as a means ofinfomation proces

The thermal degradation of poly(aryl ether ether ketone)was studied byhigh resolution pyrolysis gas chromatography-mass spectrometry technique in this work.The composition identification,distribution and temperature dependence of the pyrolysateswere inspe

Tri-hydroxymethyl aminomethane phosphate(THAMP)single crystal is anew organic crystal.The large single crystal of optical quality can be easily grown from theaqueuos solution by cooling method.The crystal structure has been determined byfour-circle diffra

Biaxial tension mechanism is one kind of important equipment for studyingmechanical model and strength criterion of the carbon/carbon composites.A simpleframe-guide-joint biaxial tension mechanism designed by IMR has been described in thispaper and it is

Microstructure and character of interface in BN fibre reinforced ZrO_2 havebeen studied.A diffusive zone exists between BN and matrix ZrO_2.In composite the BN ispresent in the form of polycrystals,Y_2O_3 and SiO_2 have diffused in BN and form glassyphase