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RELATIONSHIP BETWEEN FRACTAL DIMENSION AND CYCLIC CREEP PROPERTIES OF ROTOR STEEL 34CrMoA

YI Jianzhang Shenyang Institute of Aeronautical Engineering , Shenyang , ChinaYANG Zhi'an ZHU Shijie WANG Zhongguang Institute of Metal Research , Academia Sinica , Shenyang , China lecturer , Department of Safety Engineering , Shenyang Institute of Aeronautical Engineering , Shenyang 110031 , China

金属学报(英文版)

Vertical section method has been used to measure the fractal dimension of cyclic creep frac- ture surfaces of rotor steel 34CrMoA at 550℃.The relationship between fractal dimension and cyclic creep properties has been analyzed.The fractal dimension is dependent upon the power product of minimum cree...

关键词: cyclic creep , null , null , null

DIFFUSION BONDING OF SUPERPLASTIC AI ALLOY LC4

HUANG Yan , MA Longxiang Northeast Universtity of Technology , Shenyang , China lecturer , Department of Metalforming , Northeast University of Technology , Shenyang 110006 , China

金属学报(英文版)

Diffusion bonding of supcrplastic Al alloy LC4,with prior surface treatment of organic solution protecting coating after electroplishing and stainless steel wool brushing,was performed by Gleeble test machine under conditions ranged 490—530 ℃,1.0—3.0 MPa. 30—180 min and vacuum of 1.0×10~(-3) Pa.The ...

关键词: superplasticity , null , null , null

HYDROGEN ATTACK ON AUSTENITIC STEEL 304 UNDER HIGH TEMPERATURE AND HIGH PRESSURE

LI Xiaogang CHEN Hua YAO Zhiming LI Jin KE Wei Institute of Corresion and Protection of Metals , Academia Sinica , Shenyang , China lecturer , Institute of Corrosion and Protection of Metals , Academia Sinica , Shenyang 110015 , China

金属学报(英文版)

The hydrogen attack of austenitic stainless steel 304 exposed to hydrogen under the pressure of 5 MPa at 733 K for 2×10~4 h in service was detected.The microstructure has been studied by SEM and TEM.Hydrogen was determined with molten samples which had tempered at.573,673,773,873,and 973 K for 6 h.T...

关键词: hydrogen attack , null , null , null

BEHAVIOUR OF BORON SEGREGATION AT GRAIN BOUNDARIES IN BCC Fe-3% Si ALLOY

ZHANG Sanhong HE Xinlai CHU Youyi~* KE Jun University of Science and Technology Beijing , Beijing , China lecturer , Department of Materials Physics , University of Science and Technology Beijing , Beijing 100083 , China

金属学报(英文版)

The behaviour of baron segregation at grain boundaries in Fe-3% Si has been studied by means of particle tracking autoradiography(PTA).The results indicate that the tendency of equilibrium segregation of B at grain boundaries in Fe-3% Si is higher than that in austenitic alloys.No observable nonequi...

关键词: Boron , null , null , null

PREPARATION OF B-N FILMS BY ION BEAM ASSISTED DEPOSITION

JIANG Hai TAO Kun LI Hengde Tsinghua University , Beijing , China lecturer , Department of Materials Science and Engineering , Tsinghua University , Beijing 100084 , China

金属学报(英文版)

BN films,synthesized by ion beam assisted deposition,were analysed by RBS,AES, IR spectra and TEM.Formatiom of c-BN phase was shown not only by IR spectra at absorption peak of 1100 cm~(-1),but also by electron diffraction pattern.The results of AES demonstrate an effect of N~+ implantation near the...

关键词: ion beam assisted deposition , null

IN-SITU OBSERVATION OF THERMAL FATIGUE CRACK GROWTH IN STEEL 3Cr2W8V

LIU Jianhong HE Shiyu YAO Mei Harbin Institute of Technology , Harbin , China lecturer , Depatment of Metallic Materials , Harbin Institute of Technology , Harbin 150006 , China

金属学报(英文版)

The growing process of thermal fatigue cracking,in steel 3Cr2WSV was observed under desk SEM fitted with sell-made minisized device for thermal faligue test.Before the growing of thermal fatigue crack,the main crack tip reveals to blunt firstly,and some holes and uncontinuous microcraeks occur in fr...

关键词: steel 3Cr2W8V , null , null , null

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