ZHANG Yun
,
LIU Yulin
,
ZHAO Hong' en
,
HU Zhuangqi
,
Institute of Metal Research
,
Academia Sinica
,
Shenyang
,
ChinaZHU Zhiyong
,
WANG Zhengfu
,
Institute of Corrosion and Protection of Metals
,
Academia Sinica
,
Shenyang
,
China ZHANG Yun
,
Associate Professor
,
Institute of Metal Research
,
Academia Sinica
,
Shenyang 110015
,
China
金属学报(英文版)
The A1-2.79Li-1.3Cu-0.7Mg-0.12Zr(8090) alloy has excellent resistance to intergranular and exfoliation corrosion as naturally aged, worst as peak aged and rather better as underaged than as overaged. The corrosion behaviour of the alloy is closely dependent on its microstructure. Under the peak aging condition, the coarse T_2 phase, which is continuously distributed along grain boundaries, has so low corrosion potential in comparison with the ma- trix, this makes the corrosion resistance of the alloy to be deteriorated by anodic dissolution along grain boundaries.
关键词:
AI-Li alloy
,
null
,
null
,
null
ZHANG Jing
,
CHENG Zhaonian
,
CHEN Nianyi
,
Shanghai Institute of Metallurgy
,
Academia Sinica
,
China CHENG Zhaonian
,
Associate Professor
,
Shanghai Institute of Metallurgy
,
Academia Sinica
,
Shanghai 200050
,
China
金属学报(英文版)
The structure and transport properties in molten NaF have been studied using the method of molecular dynamics simulation. The calculations are based on two models of interionic potentials, which are Fumi-Tosi potential (FT) and the Fumi-Tosi potential without Van der Waals attractive item (FT). The radial distribution function (RDF) and the Na~+ and F~- self-diffusion coefficients have been calculated. The calculated results are in good agreement with the experimental ones. The calculation shows that the two models give nearly identical radial distribution function and self-diffusion coefficient, but the results of FTpotential are a little better than those of FT potential.
关键词:
molten NaF
,
null
,
null
YAN Yuzhang
,
LAN Hong
,
Chongqing University
,
chongqing
,
China YAN Yuzhang
,
Associate Professor
,
Department of Metallurgy and Materials Engineering
,
Chongqing University
,
Chongqing 630044
,
China
金属学报(英文版)
The desulphurizing reaction of the blast furnace low titania slag under the condition of no external agitation is confirmed to be of a first order. The controlling step is the diffusion of S in slag. The measures to accelerate the rate of desulfurization are approached.
关键词:
low titania slag
,
null
,
null
,
null
ZO U Hongcheng DAI Shujuan QIAN Zhixiong LI Guangxia Huazhong University of Science and Technology
,
Wuhan
,
China [Originally published in ACTA METALL SIN(CHINESE EDN)25(3)1989 pp A207—A212
,
Associate Professor
,
Division of Materials
,
Huazhong University of Science and Technology
,
Wuhan
,
China
金属学报(英文版)
The change of microstructure of fatigue specimens before and after laser radiation was studied by transmission electron microscopy.The results show that the diameter of dislocation cell λ tends to a constant at fatigue failure.Based on the principles of continuous damage mechanics,expressions of the fatigue damage criterion and processes of fatigue damage evolu- tion for L Y12CZ have been derived.
关键词:
laser radiation
,
null
,
null
,
null
DU Jiaju TONG Shihua Institute of Solid State Physics
,
Academia Sinica
,
Hefei
,
China [Originally published in ACTA METALL SIN(CHINESE EDN)25(3)1989 pp A226—A228
,
Associate Professor
,
Institute of Solid State Physics
,
Academia Sinica
,
Hefei
,
China
金属学报(英文版)
Optical microscope,SEM and IMMA investigation show that a strong interaction between hydrogen and calcium aluminate inclusions containing MgO may occur in medium carbon steels.This causes the hydrogen accumulating around the inclusions and reducing the ductility of the steel.
关键词:
hydrogen
,
null
,
null
JIA Jun CHEN Xianchao Harbin Institute of Technology
,
Harbin
,
China [Originally published in ACTA METALL SIN(CHINESE EDN)25(3)1989 pp A232—A234
,
Associate Professor
,
Scientific Research Office
,
Harbin Institute of Technology
,
Harbin
,
China
金属学报(英文版)
The results of the contacting fatigue tests for Cu-22%Pb plain bearing alloy show that the fa- tigue failure behavior of the alloy is related to the distribution of Pb particles.Both the addi- tions of mischmetal and sulphur can refine the Pb particles.However,mischmetal improves and sulphur deteriorates the fatigue property of the alloy.
关键词:
Cu-Pb alloy
,
null
,
null
,
null
GAO Hongbin
,
Harbin Shipbuilding Engineering Institute Harbin
,
China GAO Hongbin
,
Associate Professor
,
Harbin Shipbuilding Engineering Institute
,
Harbin 150001
,
China
金属学报(英文版)
The corrosion fatigue crack growth and near-threshold characteristics of a medium strength steel HT60 were investigated using compact tension specimens exposed to synthetic sea water. The da/dN-△AK_(eff) relation in air can give a conservative estimation of da/dN-△K relations in sea water. In the case of high R, however, crack growth acceleration at high △K regions appears to be cantrolled by the stress-assisted dissolution. The crack opening stress inlensity factor K_(op) detected by the back-face-strain method is the result of crack surface in contact with the corrosion products and therefore an overestimated value of K_(op) at the crack tip is given.
关键词:
corrosion fatigue
,
null
,
null
,
null
