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ATOMIC SCALE MECHANISM OF RESTRAINED EMBRITTLEMENT IN AMORPHOUS Fe_(78)B_(13)Si_9 ALLOY BY ELECTRIC PULSE RAPID ANNEALING

J.L. Huang , X.G. Cao , E. Sukedai , S. Yamasaki , and H.C.Gu(Department of Materials Engineering , Luoyang Institute of Technology , Luoyang 471039 , China)(Department of Mechanical Engineering , Okayama University of Science , 1-1 Ridai-Cho , Okayama City , Okayma 700 , Japan)(Institute of Materials Science and Engineering , Xi'an Jiaotong University , Xi'an 710049 , China)

金属学报(英文版)

The direct observations of the atomic arrangements in both conventional furnace annealed and electric pulse rapid annealed Fe78B13Si9 amorphous alloy have been conducted by the lattice imaging technique in a higt resolution electron microscope. The results showed that the embrittlement of the alloy ...

关键词: Fe_(78)B_(13)Si_9 amorphous alloy , null , null , null

EFFECT OF SILICON ON PRODUCING DUCTILE IRON WITH COMPLEX STRUCTURE OF BAINITE AND MARTENSITE

Y. P. Zhang , J.X. Zhu , Y. Q. Wang and J.Y.Su(Institute of Cast Iron Research , Xi'an University of Technology , Xi'an 710048 , China)(Department of Mechanical Engineering , Xi'an Jiaotong University , Xi'an 710049 , China)

金属学报(英文版)

This paper deals with an important role of silicon in producing ductile iron with quenched complex structure of bainite and martensite. The samples are cast in permanent mold and quenched in solution of sodium silicate. The result of thc experiments shows that the austenizing temperature should rise...

关键词: ductile iron , null , null , null

EXPERIMENTAL INVESTIGATION ON HISTORY-DEPENDENCE OF PLASTIC BEHAVIOR OF TYPE 302 STAINLESS STEEL UNDER COMBINED AXIAL-TORSIONAL LOADS

S.X. Zhao , X.F. Sun and Z.B. Kuang (Institute of Applied Mechanics , Southwestern Jiaotong University , Chengdu 610031 , China)(Institute of Engineering Mechanics , Xi'an Jiaotong University , Xi'an 710049 , China)

金属学报(英文版)

Experimental investigations were pedermed on the plastic deformation along bilinear strain paths with various values of corner-angle by subjecting thin-walled tubular specimens of type 302 stainless steel to combined axial and torsional loads. Variations of scalar and vectorial behavior of the stres...

关键词: complex loading , null , null

STUDY OF THE MICROSTRUCTURE SIMULATION AND PERFORMANCE OF FUSION WELDING HAZ OF ZINC-BASED ALLOY

K.K. Zhang , D.R. Chen , J. Xue , D. W. Sun and H.C. Li( 1) Department of Materials Engineer , Xi'an Jiaotong University , Xi'an 710049 , China 2) Luoyang Institute of Technology , Luoyang 471039 , China 3) CITIC Heavy)

金属学报(英文版)

Base on a vast amount of testing and calculations for the welding thermal cycling curves of different testing points in fusion welding (TIG welding, gas welding) HAZ of zinc-based alloy with low melting points, this paper defines the welding thermal cycle parameters of microstructure stimulation of ...

关键词: zinc-based alloy , null , null , null , null

Nondestructive Evaluation of Ferroelectric Multilayer Capacitors Using Electromechanical Resonances

Hongtao SUN , Hongfang WANG , Liangying ZHANG and Xi YAO(Electronic Materials Research Laboratory , Xi'an Jiaotong University , Xi'an , 710049 , China)

材料科学技术（英文）

Under the mechanically free and clamped boundary conditions, electromechanical resonances of ceramic multilayer capacitors are calculated using vibration and piezoelectric equations. Multilayer capacitors made of ferroelectric BaTiO3 and Pb(Mg1/3Nb2/3)O3 ceramics have been used to examine the theore...

关键词:

Ceramics Surface Modification by Excimer Laser Metal Coating

Weidou ZHU and Haicheng GU(Dept. of Materials Science and Engineering , Xi'an Jiaotong University , Xi'an , 710049 , China)

材料科学技术（英文）

Thin metallic layers (~ 2 μm) of Ni were deposited on polycrystalline Al2O3. ZrO2 and (Ce-TZP)+Al2O3 ceramic substrates. and further irradiated with pulsed excimer (Xeno chloride) laser pulses. The laser energy density was varied from 0.21 to 0.81 J / cm2 to optimize bending strength. For ZrO2 ceram...

关键词:

A NEW NON-UNIFORM YIELD PHENOMENON AND ITS MECHANISM

W.F. Zhang , Y.M. Chen and J.H. Zhu(State Key Laboratory for Mechanical Behavior of Materials , Xi'an Jiaotong University , Xi'an 710049 , China)

金属学报(英文版)

A new non-uniform yield phenomenon is found during tension of austenite stainless steel at -190℃, which consists of elasto-plastic instability ξph and stress plateau ξL resulting from strain-induced martensite transformation. It is essentially different from non-uniform yield that is related to disl...

关键词: non-uniform yield , null , null , null

Plastic Deformation in Quench-and 650℃ Tempered Steel

LIU Yumen Department of Materials Science and Engineering , Xi'an Jiaotong University , Xi'an , China.

材料科学技术（英文）

The variations of the dislocation structures in the quench and 650℃ tempered steel with increase of elongations have been investigated by using transmission electron microscopy. In the small elongation stage, the boundaries between ferrite and carbide in this steel can release dislocations. As the e...

关键词: plastic deformation , null , null

EFFECT OF SPECIMEN SIZE ON J_R RESISTANCE CURVE

H.P. Chen and Z.J. Deng (State Key Lab. for Mechanical Behavior of Materials , Xi'an Jiaotong University , Xi'an 710049 , China)

金属学报(英文版)

The effect of specimen thinkness on JR resistance curve has been investigated using low and middle strength steels. As the J dominance regime is reached, the initial J-integral values, J(i), are definite even if the elastic component Ji(e) and plastic component Ji(p)vary with the thinkness of specim...

关键词: : fracture mechanics , null , null , null

ON SPINODAL BOUNDARIES OF Al-Li ALLOYS

WEI Yinghui , WANG Xiaotian (School of Materials Scince and Engineering , Xi'an Jiaotong University , Xi'an 710049 , China Manuscript received 10 Mareh , 1994)

金属学报(英文版)

The spinodal decomposition can occur in Al-Li alloys containing 5.8-14.2 at.% Li at room temperature. The modutated structure wavelength is approximately 3.1 nm for com mercial Al-LI alloys. The limit composition of the miscibility gap is 3.66 -16.06 at.%Li at 298 K. The highest temperature of the ...

关键词: : Al-Li alloy , null , null

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