The cold rolling textures of bcc metals were simulated by Taylor modeladapted to{110}<111>,{112}<111>,{123}<111>slip systems.An assumption wasintroduced in the simulation,which supposes critical slip systems having the same possibili-ty to glide and the i

According to the experimental data the values of Hill′s plastic strain ratio,γ,for different kinds of sheet metals are not at all certain a constant independent fromstrain magnitude.Therefore a general model to calculate γ-value is developed in the presen

Fatigue crack propagation in a compressive residual stress field can be char-acterized with the closure effect.The closure force under cyclic loading as well as crackgrowth rate may be determined by experiments.Results show that the minimun crackgrowth ra

The influence of the lattice misfit and γ′precipitate morphology on the pro-perties of both stress-rupture and creep in a single crystal Ni-base superalloy was investi-gated.The dislocation structure during creep deformation has been observed.It has beenf

The silicon-branching of growth of Al-Si eutectic undercons trained condi-tion has been investigated experimentally.It is suggested that the branch cluster of theeutectic silicon is of fractal structure.The fractal dimension value D_f=1.74±0.10 is givenfr

Wrapped up by quarz and treated by heating—cooling cycle,highlyundercooled Al-25.44 Mn-17.15Si melt was obtained.Experiment results show that thephase seperation from liquid appears three times when the alloy solidifies.It is found byX-ray diffraction and

In this paper,the microstructures and properties of two kinds ofAl-Li-Mg-Zr alloys have been studied.The Mg acts as an important solution strength-ening element.The concentration of Mg do not change the tendency of aging hardening ofAl-Li-Mg-Zr alloy.The

A thermomechanical treatment for grain refinement in 7475 aluminium al-loy is reported.The process includes solution treatment,deformation and recrystallizationsteps.This treatment procedure is more suitable for application in a modern plant.Thegrain size

The effects of grain size on serrated yielding in Cu-32Zn alloy were investi-gated.It was found that the exponents β and m in eqs.ρ_m=N·ε~βand C_v= K·ε~m in-crease with grain size.The temperature region of serrations can be devided into threeranges,i.e.th

The microstructures in 8Ni,10Ni and 18Ni maraging steels have been studied by thetransmission electron microscope.It has been shown that the modulated structure developed during theearly aging stage in 8Ni alloy was evidenced,and the modulated structures

T10 steel with a starting structure of ferrite and spheroidal cementite wasimployed to undergo laser processing.Microstructure in the laser-processed zone was in-vestigated by means of TEM.Both microcrystal and amorphous phases were found in thelaser-proc

The a.c.susceptibility(x′),nourmal state resistivity(ρ_n)and critical currentdensity(J_c)of super conductive Y-Ba-Cu oixde were measured.The raito of imaginarypart maximum(X″_(max))to real part(x′)of a.c.susceptibility was calculated.The results showthat

By the reaction between polycarbosilane and tetrabutoxititanium,polytitanocarbosilane PTC-Ⅰ containing Ti(atom ratio Ti/Si=0.02—0.04)weresynthesized.The spinnability and the melting point of PTC-Ⅰ are changed regularly withincreasing the content of Ti.By

The electric conductivity of 0.5Li_2S-0.5GeS_2 glass is higher than0.4Li_2S-0.6GeS_2 glass.But the electric conductivity of latter has higher value than theformer when these two glasses mix LiI respectively.If two kinds of additive salt LiI andLiBr are ad

In this paper,a method preparing ultrafine TiO_2powder by laser irradiationwas presented.Meanwhile the formation conditions of particles were discussed.TEM ob-servation showed that the ultrafine powder was composed of particles from 6 to 20nm withanatase

The recent development of the structure and manufacturing features of va-rious ferromagnetic polymer has been reviewed.Main analysis was given to the develop-ment of ferromagnetic polymer,especially,of nitroxyl radical substituted diacetylenes asmonomers

To improve adhesion of the polyimide(PI),the copolyamic acids(CPAA)were prepared,and an OB′B(ODA-BTDA-BOPDPA)was selected.The effects of com-ponents of monomers,molecular weight of CPAA and its blends,imidization temperature(Ti)as well as solvents on the

A model,based on SEM micrograph of replica and observation,is prsesent-ed in this paper for the analysis of stiffness reduction of composite laminates due todebonding of the interface between fiber and matrix.The method of isoparametric elementswith eight