XU Xiangxing SU Yi ZHOU Wei Tsinghua University
,
Beijing
,
ChinaCAI Qigong Central Iron and Steel Research Institute
,
Ministry of Metallurgical Industry
,
Beijing
,
China XU Xiangxing
,
Dept.of Mechanical Engineering
,
Tsinghua University
,
Beijing
,
100084
,
China
金属学报(英文版)
The cleavage fracture mechanism of granular bainitie weld metal in 15MnVN steel has been investigated.SEM observation of a special specimen for revealing simultaneously fracture sur- face and microstructure shows that the cleavage of the weld is initiated by M-A constituent. The 95th percentile equi...
关键词:
granular bainite
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YAO Kefu TANG Naiyong CHEN Nanping Tsinghua University
,
Beijing
,
China [Originally published in ACTA METALL SIN(CHINESE EDN)25(3)1989 pp A213—A218
,
Ph.D.Student
,
Dept.of Materials Sci.and Eng.
,
Tsinghua University
,
Beijing
,
China
金属学报(英文版)
The development of dislocation structures in the plastic zone ahead of a crack tip has been in- vestigated in a duplex stainless steel during in-situ deformation experiments in a scanning transmission electron microscope.It was found that the dislocation distribution was significantly different in t...
关键词:
crack tip
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DONG Zhili
,
MA Jusheng
,
TANG Xiangyun
,
YOU Liang Tsinghua University
,
Beijing
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China lecturer Department of Materials Science and Engineering
,
Tsinghua University
,
Beijing 100084
,
China
金属学报(英文版)
The oxidation rate,the growth,morphology and structure of oxide scale and whiskers for Fe-Ni-Cr sealing alloys in H_2-H_2O atmosphere at high temperatures have been studied. The growth rate of scale is controlled by diffusion.The scale is composed of Cr_2O_3 and spinel(Fe,Mn)O·Cr_2O_3 and the oxide ...
关键词:
oxidation
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null
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HE Jianhong TANG Xiangyun CHEN Nanping Tsinghua University
,
Beijing
,
China Professor
,
Division of Metallic Meterials
,
Department of Materials Science and Engineering
,
Tsinghua University
,
Beijing
,
China
金属学报(英文版)
The permeation curves of hydrogen in ferritic-austenitic duplex stainless steel have been electrochemically determined.The apparent diffusivity of hydrogen depends on the austenite content(f_γ)at room temperature,D=(0.27+0.9/f_γ~2)(10~(-10)cm~2/s).It is simply verified that hydrogen in ferritic-aust...
关键词:
hydrogen
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null
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H. Y. Zhao
,
A. L. Lu
,
Q. Y. Shi and F. Yan (Welding Division
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Department of Mechanical Engineering
,
Tsinghua University
,
Beijing 100084
,
China)
金属学报(英文版)
T-joints are widely used in ship manufacturing and other welding structures.The welding residual stress and deformation hare significant influence on failure and service life in welding structures.By us- ing of 3D thermal elasto - plastic FEM, the temperature fields,stress fields and deformation ...
关键词:
welding
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JIANG Hai TAO Kun LI Hengde Tsinghua University
,
Beijing
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China lecturer
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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
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YU Jingfen LIU Difei Tsinghua University
,
Beijing
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China professor
,
Dept.of Chemical Engineering
,
Tsinghua University
,
Beijing 100084
,
China
金属学报(英文版)
The thermodynamics of micella formation,interfacial characteristics,synergistic effects and interfacial kinetics for synergistic extraction system D_2 EHPA-MPA-Fe~(3+) have been studied.It was found that D_2EHPA in the mixed system strongly exhibits the effect on the micella formation thermodynamics...
关键词:
interfacial chemistry
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