材料期刊网

MEASUREMENTAL RESEARCH ON THE MAGNETOMECHANICAL COUPLING PROPERTIES OF RARERARTH GIANT MAGNETOSTRICTION MATERIALS

C.Y. Li1) , H.Q. Yuan2) , F.X. Meng3) and Z. Zhou4) 1) Institute of Liaoning Technology , Jinzhou 121001 , China 2) Northeastern University , Shenyang 10006 , China 3) Shenyang University , Shenyang 110044 , China 4) Xincheng Rare Earth Magnetostrictive Materials Ltd. , Dashiqiao 115100 , China

金属学报(英文版)

The physical modelanditsequivalentcircuitoftestapparatusissetup by meansofimpedanceanalysis method. The magnetostriction coefficient, magnetomechanicalcoupling coefficient,frequency and anti- frequency of TbxDy1 - xFe2 - z(0 27 ≤x ≤0 3 ,0 ≤z ≤0 1) rod are measured. Somecoupling problems with mechanicalstress and electromagnetic field such as flux leakage in magnetic path are discussed. The comparing calculated with tested resultsshowsthe accuracyof measurementand thesimplification of model.

关键词: magnetostriction material , null , null

THEEFFECTS OF SOLUTION TREATMENT ON NEAR ALPHA HIGH TEMPERATURE TITANIUM ALLOYS

J. Zhang1 , 2) , G.P. Li1) and D. Li1) 1) Institute of Metal Research , The Chinese Academy of Sciences , Shenyang 110015 , China 2) Shenyang University , Shenyang 110044 , China

金属学报(英文版)

omesolution treatmentsfor Ti 5 8 Al 4 8Sn 2 0Zr 1 0 Mo 0 34Si 0 90 Nd (1 # alloy) , Ti 6 3 Al 4 8 Sn 2 0 Zr 1 0 Mo 0 34 Si 0 90 Nd(2 # alloy) and Ti 6 8 Al 4 8Sn 2 0 Zr 0 5 Mo 0 34 Si 0 70 Nb 0 90 Nd (3 # alloy) several near alpha Titanium alloysat various temperaturesin (α+ β) two phaseregion havebeen carriedout. Theeffectsofsolution treat menttemperatureon theshape,size, distribution andvolumefraction ofthe primary alpha phase(αprim)havebeeninvestigated. Theresultsshowed thattheshape ofαprim did not depend onthesolution temperature, butthesize, the distribution and the volume fraction changed withthevariedsolutiontreatmenttemperature. Theprimaryalpha phaseprincipally precip itated atthe βgrain boundary regions atthe higher temperature nearthe Tα+ β/ β, and asthe temperature was dropped, αprim precipitated in a more uniform way. By energy spectrumanalysisof SEM, the elemental distributionsin primary αphase and transformed βphase(βtrans) havebeeninvestigated. The resultsshowed thatthe amount of Alelementin αprim is higherobviouslythanin βtransathighertemperature. Asthesolution temperature gotdropped theconcentrationsof aluminum elementgot moreuniform in both αprim and βtrans. Thehigher concentration of aluminum elementin αprim would play a importantrolein orderedα2 phase precipitation, and so have an importanteffecton the high temperature properties of the al loys.

关键词: titanium alloy , null , null

THE DETERMINATION OF THE RESIDUAL STRESS DURING THE FATIGUE CRACK EXTENDSION

X.G.Guo1) , H.R.Yang1)and T.Wu2) 1) Shenyang University , Shenyang 110044 , China. 2) Liaoning Jin sheng Construction Company , Shenyang 110044 , China.

金属学报(英文版)

The distribution law of the lateral residualstress at the welding seam is determinated by meansofcuttingthespecimen. Becausetocutthespecimencansimulateapproximatelytheex tension ofthe fatiguecrack,through measuring thestressreleased and calculating the distri bution oftheresidualstressthelaw isfound thattherateofthefatiguecrackextensionisaf fected bytheresidualstress.

关键词: crack extension , null , null

THE INFLUENCE OF Bi ON THE INTERFACIAL WETTABILITY BETWEEN SiC PARTICLES AND NiCrMo ALLOY CAST IRON

J.B. Li1) , J.P. Niu1) and X. Wang2) 1) College of Machinery , Shenyang University , Shenyang 110044 , China2) BenxiIron and Steel Company , Benxi111800 , China

金属学报(英文版)

The present paper reportsasystematicinvestigation ontheinfluenceof Bielementon thein terfacial wettability of NiCrMo alloy castiron and their related mechanism by means of thesessiledrop method . Thesurfacetension hasbeen calculated and analysised . Thestudyshows thatasmallamountof Bielementcan significantlyimprovethe wettabilitybetween SiCandNiCr Moalloycastiron. Theoptimin Bicontentis0 01 wt% .

关键词: composites , null , null , null

LASTER SURFACE CLADDING BY Co BASE ALLOY WITH Ce ON 20 # STEEL PERFORMANCE AND MICROSTURCTURE STUDYS

L.J.Shang1 2) , Y.Wang2) , Q.K.Cai1)and C.S.Liu1) 1) Northeastern University , Shenyang 110006 , China 2) Shenyang University , Shenyang 110044 , China

金属学报(英文版)

Onthebase of 20 # steel, Co base alloy with Ce and without Ce was obtained with laser heatingtechnology. Theresultshowsthat Cehasobviouslyeffecton alloy microstructureespe ciallyimprovethecorrosion resistancein acid by31 % ,oxygenation resistanceby23 % ,in al kalescent liquid by 23 % . Improve fearlessness 30% and improve hardness by 168 HV.Throughcontrast and analysison the Co base microstructure with Ce and without Ce . The paper discussthetheory of Ce modification Co base alloy from theside of cooling thermody namicsand dynamics

关键词: rareearth , null , null , null

STUDY IN FO RMATION OF SUB GRAINS AND MICROCRACKS IN WEIDED METAIS UNDER FATIGUE LOAD

S.Z.Dong , J.B.Li , X.H.Zhang and J.Zhang Shenyang University , Shenyang 110044 , China

金属学报(英文版)

With TEM( Transmission Electron Microscope) ,ithasobserved and analyzedthatforming processof Sub grainsand position offormingfatigue microcracksarein Welded metalsofthe16 Mnsteelundertensile tensilestress. Theresultsindicatedthattheforming processof Sub grainsfrom dislocationtanglecellstotheSub grains. Thepositionofformingfatigue micro crackisattheoxidativeinterfaceand granular noncrgstallines and Sub boundaries. Thece mentiteineutectoidsafterfracture may beproduced microcracks.

关键词: fatigueload , null , null , null

THE CALCULATION OF THE COHESIVE ENERGY OFГPHASE IN THE TRANSITIONAL LAYER FE ZN OF HEAT GALVANIZED SHEET USED IN CARS

W.M. Ma1) , C.F. Qian2) and X.F. Cheng2) 1) Shenyang University , Shenyang 110044 , China 2) Northeastern University , Shenyang 110006 , China

金属学报(英文版)

hethesisanalysesthevalenceelectronstructuresof phase Γin Fe Zn transitionallayerof heat galvanized sheet used in cars by applying the Empirical Electron Theory of Solids andMolecules, and calculatesthebond energy ofthe major bondsand cohesiveenergy ofcrystals,from which we draw theconclusion:sincecrystal has alargercohesiveenergy, it has higherhardness, butsinceitsbondenergyisratherlow ,itiseasytobreak under pressurefrom out side, and thecrackiseasytocome up andspreadin phase Γ.

关键词: the empirical electron theory of solids and molecules , null , null , null

The effect of environmental variables on atmospheric corrosion of carbon steel in Shenyang

Chinese Science Bulletin

A study was carried out in order to investigate the effect of contaminants and meteorological variables on the rust layer of carbon steel exposed in Shenyang urban atmosphere. Seven kinds of contaminants and twelve kinds of meteorological parameters were also registered in order to correlate the data with respect to corrosion rate and the stepwise multiple regression analysis was carried out in order to obtain the best regression model. The sum of rainfall time as well as sunshine time and the concentration of H(2)S could stimulate initial atmospheric corrosion of carbon steel. The initial atmospheric corrosion kinetics of carbon steel was observed to follow the cubic equation. The corrosion products were analyzed by XRD and the transformation of phases in different periods was discussed.

关键词: contaminants;meteorological parameters;carbon steel;urban atmospheric;corrosion;stepwise multiple regression;corrosion products;rust;pollution

STUDY ON DISLOCATION STRUCTURES IN WELDED METALS UNDER FATIGUE LOAD

H.R.Yang Shenyang University , Shenyang 110044 , China

金属学报(英文版)

With TEM( Transmission ELectron Microscope),it hasbeen oberved and analyzed thatthe dislocationsarrangementsandthefatigue damageofeutectoid arein weled metals which were loaded at differentfatigueloads and load cycles.The resultsindicated thatthecharacter of fatigue damagein ferritesof welded metalsisthedislcationsarrangementchange and ieutec toidsof welded metalisthebroken cementites.This may be produced microcracks.

关键词: fatigue load , null , null , null , null

The fourth editorial committee meeting of JMST was held in Shenyang, China

材料科学技术（英文）

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