The changes of grain boundary internal friction peak and the correspondingmodulus relaxation of pure copper have been investigated in the couse of constant rate ten-sile deformation at different temperatures.The following four relaxation parameters:(a)the

In this paper materials with high yield strength,toughness and work-hard-ening ability are regarded as the most ideal materials to resist high-stress especially severelyimpact-loaded abrasion.High-carbon low-alloy steels with the microstructure ofaustenit

Low frequency(f=0.5—1Hz)internal friction(IF)of Ti-H alloys con-taining 0.12—1.12 wt-% hydrogen was found to be dependent on hydrogen content.(1)The IF peaks of high hydrogen alloys(0.80—1.12 wt-%)were observed at 325℃ duringheating and 225~C during cooli

Bulk undercooled Ni-32.5 wt-%Sn melt was obtained by purifying themelt.The solidification process of the undercooled melt was studied.The formation of thevarious kinds of structures was analyzed.It is found that regular eutectic structure isformed if the

The general statistical nature of pattern growth such as grains,ordered do-mains,precipitate particles,radiation defect groups and fatigue microcracks has been inves-tigated based on temperature fluctuation and microstructure background fluctuation.Thesto

A method for determining misorientation between crystals in cubic systemby using kikuchi lines in convergent beam electron diffraction(CBED)pattern was devel-oped in the present paper.This method was applied to determine the misorientation be-tween subgra

Effect of alloying elements on the precipitation and tensile properties ofAl-Li alloys was studied by hardness measurement,tensile test and electron microscopyobservation.Results indicated that the increase in Li content caused high Strength and lowductil

This paper deals with the surface apparent process of plasma carburizing.The steel 20 and T12 were used.The carburizing gas was the mixture vapors of methanoland ethanol.The results show that the atmosphere of plasma carburezing is the importantfactor whi

The low cycle fatigue test of high manganese steel Mn13 has been conductedat room and low temperature in this paper.Microstructure changes during strain cyclingand the mechanism of deformation and work hardening in high manganese steel have beeninvestigat

The lattice parameter of Fe-Mn-C austenite dissolved aluminium,chro-mium and silicon has been measured by means of X-ray diffractometer.The experimentalresults indicate that lattice parameter of Fe-Mn-C austenite increases linealy with an in-crease in alu

Trihydroxylaminomethane phosphate(abbreviated THAMP)is a new polarcrystal.Belonging to point group 2,it has independent 13 elastic,8 piezoelectric and 4dielectric constants.All these parameters were determined using 14 properly oriented spec-imens and 4 v

In the system Li_2O-B_2O_3-WO_3,the glass forming region was extended twotimes by use of twin-roller quenching technique.Infrared and Raman spectrum revealedthat W~(6+)ion is located in the tetrahed-rally coordinated oxygen ligands and participated innetw

The glass formation region in the ternary system of CdCl_2 -PbCl_2-KClwas identified for the first time in this work,and the formation of some multicomponentglasses based on CdCl_2 and PbCl_2 was also reported.The IR transmitting spectra studiesshow that

Rhodamine 6G(R6G),a widely used laser dye,is incorporated at differentconcentrations in silica gels and coatings via the sol-gel process,and its fluorescent proper-ties are studied using a frequency-doubled YAG laser(0.53μm)as the excitation lightsource.C

The preparation conditions of activate carbon fiber SCAF,which are madeof natural fiber,and adsorptive properties towards metal ions in the aqueous solution havebeen investigated.The experimental results indicated that condition of activated reactionsuch

By using DSC,TBA(Torsional Braid Analysis)and FTIR,the compatiblecharacteristics of polyetheretherketon(PEEK)/Polyarylethersulfon with cardo group(PES-C)blends have been studied.The results show that PEEK and PES-C are partiallycompatible,and the compatib

A new method of chemical silver plating on carbon fibers(CF)has been in-vestigated.It is found that since CF is not normally catalytic to electroless silver plating,thecoatings are incomplete and of poor adhesion by direct chemical silver plating even aft

Two kinds of siliconized reinforced carbon-carbon composite,laminatedcarbon based and carbon felt based,were oxidized in air at 1300℃ in a thermobalance.Theaverage mass loss rates of the laminated carbon based and carbon felt based composite oxi-dized at