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OALib Journal期刊

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STUDY ON DISLOCATION STRUCTURES IN WELDED METALS UNDER FATIGUE LOAD
HRYang Shenyang University,Shenyang,China,
H.R.Yang Shenyang University
,Shenyang,China

金属学报(英文版) , 1999,
Abstract: 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.
THE PRESENT E-COMMERCE SITUATION IN BANGLADESH FOR B2C E-COMMERCE
Roni Bhowmik,Shenyang,Daoyi
International Journal of Economics and Research , 2012,
Abstract: Internet has opened up a new possibility for trade and commerce, which is electronic commerce. E-commerce involves the use of the Internet in the advertising, identification, payment and supply of goods and services. It applies the opportunity for “boundary crossing” as new entrants, business models, and changes in Technology erode the roadblocks that victimized to individual one industry from other. In developing countries, big companies also micro and medium enterprises like have adopted e-commerce business process. In order to utilize the opportunities in developing the economy Bangladesh government has also initiated many programmes and provides different facilities to promote the adoption of the technology in various sectors. In that starry-eyed catch B2C e-commerce promises a basic shift in the way in which global buyers and sellers trade with each other. The paper looks at the B2C electronic commerce future in Bangladesh analysis in country present conditions.
METHOD FOR CALCULATION AND SIMULATION ON PROPAGATION OF SURFACE CRACK ON SPHERICAL VESSELS MADE OF STEELS
TJBai,CFRen Shenyang University,Shenyang,China Institute of Metal Research,The Chinese Academy of Sciences,Shenyang,China,
T.J.Bai
,and C.F.Ren Shenyang University,Shenyang,China Institute of Metal Research,The Chinese Academy of Sciences,Shenyang,China

金属学报(英文版) , 1999,
Abstract: To avoid leaking or bursing by crack on surface of preddure vessels made of streels,a method for analyzing the principle of propagation of a surface crack is established,and used on a spherical vessel with program calculation and simulation,the program is written in QBASIC and the reaults are provided and discussed.
LASTER SURFACE CLADDING BY Co BASE ALLOY WITH Ce ON 20 # STEEL PERFORMANCE AND MICROSTURCTURE STUDYS
LJShang,YWang,QKCaiand CSLiu Northeastern University,Shenyang,China Shenyang University,Shenyang,China,
L.J.Shang
,Y.Wang,Q.K.Caiand C.S.Liu Northeastern University,Shenyang,China Shenyang University,Shenyang,China

金属学报(英文版) , 1999,
Abstract: 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
THEEFFECTS OF SOLUTION TREATMENT ON NEAR ALPHA HIGH TEMPERATURE TITANIUM ALLOYS
J Zhang,GP Li,D Li Institute of Metal Research,The Chinese Academy of Sciences,Shenyang,China Shenyang University,Shenyang,China,
J. Zhang
,G.P. Li and D. Li Institute of Metal Research,The Chinese Academy of Sciences,Shenyang,China Shenyang University,Shenyang,China

金属学报(英文版) , 1999,
Abstract: 1.IntroductionHightemperaturetitaniumalloysforuseingasturbineengines,airframesandotherapplicationshasexperiencedalongtime.Thehighstrengthtodensityratiooftitaniummakesitaveryattractivedesignchoiceinenergyefficienthighthrusttoweightengines.Tita…
DIRECT SYNTHESIS OF SIA LON/ SiC MULTIPHASE REF RACTORY USING CLAY
H Q Ru,N Zhang,P Z Yu,X D Sun Northeastern University,Shenyang,China Shenyang University,Shenyang,China,
H. Q. Ru
,N. Zhang,P. Z. Yu and X. D. Sun Northeastern University,Shenyang,China Shenyang University,Shenyang,China

金属学报(英文版) , 1999,
Abstract: Sialon/ Si C m ultiphase refractory w as directly synthesized using cheap clay , Si C particlesand proper ad ditives . The new synthesizing process is si m ple an d of low cost . The synthesizedm aterial has good roo m tem perature m echanical properties and ther m al shock resistance . Thisw ork has provided the experi mental basis for the ap plication of high property an d cheap Sialon/ Si C m ultiphase refractories .
THE DETERMINATION OF THE RESIDUAL STRESS DURING THE FATIGUE CRACK EXTENDSION
XGGuo,HRYangand TWu Shenyang University,Shenyang,China Liaoning Jin sheng Construction Company,Shenyang,China,
X.G.Guo
,H.R.Yangand T.Wu Shenyang University,Shenyang,China. Liaoning Jin sheng Construction Company,Shenyang,China.

金属学报(英文版) , 1999,
Abstract: 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.
Hydrogen Trapping by Dislocations and Grain Boundaries in Fe-3%Si AHoy
Yuandong DIAO Shenyang Institute of Chemical Technology,Shenyang,ChinaMingzhou CAO Xiaojing WAN Institute of Metal Research,Academia Sinica,Shenyang,China,

材料科学技术学报 , 1993,
Abstract: In present work,Fe-3%Si alloy specimens with various degrees of cold working and various grain sizes were chosen to determine the effect of cold working and grain sizes on the hydrogen diffusivities by electrochemical permeation method and the mechanism of hydrogen trapping by dis- ocations and grain boundaries is discussed.
Influence of Grain Size and Texture on the Yield Asymmetry of Mg-3Al-1Zn Alloy

SMYin,CHWang,YDDiao,SDWu,SXLi Shenyang University of Chemical Technology,Shenyang,China Institute of Metal Research,Chinese Academy of Sciences,Shenyang,China,

材料科学技术学报 , 2011,
Abstract: The yield asymmetry between compression and tension of magnesium alloy Mg-3Al-1Zn (AZ31) with different grain sizes and textures has been studied by tensile and compressive testing of as-cast, as-extruded and equal channel angular pressed (ECAPed) specimens. The significant yield asymmetry (the ratio of yield strength between compression and tension σyc/σyt is~0.44) was found in as-extruded specimens and the corresponding microstructure evolution during deformation revealed that {1012} tensile twinning is the underlying reason for the large yield asymmetry. Strong texture and grain size are influential factors for large yield asymmetry. The separate contributions of grain size and texture on yield asymmetry were investigated.
A STUDY OF EXPERT SYSTEM FOR SECTION EXTRUSION PROCESS BASED ON FINITE ELEMENT METHOD SIMULATION
HWLiu,HDing,JZCui School of Mechanical Engineering,Shenyang University,Shenyang,China School of Materials & Metallurgy,Northeastern University,Shenyang,China,

金属学报(英文版) , 1999,
Abstract: The samples obtained by Finite Element Method (FEM) simulation for section extrusion process have been trained on BP Neural Networks. The mapping relationsbetween die's geometrical parameters and energetic parameters, such as stress and strain generated in the die are established. The extrusion process model and its expert system are also determined. The excellent expansibility this system possesses provides a new prospect for the future development of expert system for section extrusion dies.
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