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
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null
,
null
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
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null
,
null
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
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null
,
null
,
null
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
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null
,
null
,
null
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
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
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null
,
null
,
null
,
null
