Equations between degree of undercooling and thermal properties of metalsin homogeneous nucleation,non-homogeneous nucleation and solidification under pres-sure have been established.Based on conventional data of thermal properties of metals,theexperiment

The interaction between Al_2O_3 particle and the growing solid-liquid inter-face in Al_2O_3 particle/A1-2.OMg-4.5Cu alloy composite during solidification is investi-gated by means of directional solidification technique in this paper.The distribution lawa

Influence of Mn on rheological behavior of Al-5wt-%Cu alloy insolid-liquid coexistence zone (SLCZ) has been investigated on apparatus specially de-signed.Results show that Mn makes shear modulus,viscosity and yield strength of alloys inSLCZ raise to some

The equilibrium temperatures of the disordered α and β phases T_0and ofthe ordered α′and β′(L2_1structure)T_0,as well as the M_s(β′assumed to be B2,DO_3,andL2_1structure respectivety)have been calculated thermodynamically for Cu-Zn-Al alloyswith various c

The structure morphologies of products formed in the earlier stage of inter-mediate transformation in the experimental alloys Fe-C-Mo and Fe-C-Si-Mn have beeninvestigated with TEM.It was found that in whole intermediate temperature range thetransformation

Dislocation behavior and effect of hydrogen have been observed near thecrack-tip in Fe-3%Si single crystal during in-situ deformation in an electron microscope.It has been found that a number of dislocations were emitted from the crack-tip duringdeformati

Fractal dimensions of fracture surfaces of 7475 Al were measured by verticalsection method when the alloy was deformed under different temperaute,strain rate andgrain size.The results show that the higher the fractal dimension of fracture surface,thelarge

Aluminum alloys L2,LD2,LF12,LY12,AI-4%Cu were implanted with ni-trogen ions at energy of 80keV at room temperature and dose range of 1×10~(16)—8.3×10~(17)N~+·cm~(-2).The surface structure,chemical bond of the implanted surafce layer were in-vestigated by

We performed the measurements of the bulk modulus E,yield strength S_y,fracture strength S and fracture work W in randomly punched plates of plexiglass,steeland aluminium.A power law relation is observed for E,S_y,and S near the percolationthreshold and t

The superplasticity induced by dynamic recrystallization in commercial al-uminium alloy LY12Y was studied.LY12Y sheet can exhibit suppertasticity in a wide rangeof temperature and strain rate in receipt condition.The maximum elongation of 243% wasobtained

Bamboo is a species of abundant natural plant materials with highspecific-strength and high specific-modulus.This paper is concerned with fracturebehaviour of Phyllostachys and Bambusoides with notch at different face.Bending fracturetests were carried ou

VO_2 powder and VO_2 ceramics are prepared by diamine hydrochloridemethod and typical ceramic technology respectively.A insulator (monoclinic) to metal(tetragonai)transition with an abrupt decrease of electric resistance is observed around70℃.The variatio

The transesterification reactions occuring during melt mixing ofpoly(butylene terephthalate)(PBT)with polycarbonate(PC)which both made in our coun-try are studied by intrinsic viscosity measurements,solubility separations,IR spectroscopyand selective degr

The yielding phenomena of viscoelastic materials consist of three factors:1)the time dependence of the bulk stress-strain relation;2)the time dependence of the yield-ing initation mechanism;and 3)the kinetics of the molecular flow and bond rupture of theo

Phlogopite based glass-ceramic KM_(g3)(AlSi_2O_(10))F_2 is one kind ofbritttle,machineable ceramic material.Its brittle and mechanics properties are obviously im-proved after reinforced by carbon fiber to form composite (CPMC) which remainsmachineable.Thr

In this paper,it is discovered that the basic hypothesis of fracture mechanics,K_(1c)=σ_f(ay)~(1/2) being a constant,is untenable when the crack size is smaller than certain val-ue which related to the material behavior.Thus,the measuring results with sma