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INFLUENCE OF HOMOGENIZATION TREATMENT UNDER AN ELECTRIC FIELD ON DUCTILITY OF 2091 Al-Li ALLOY DURING HOT ROLLING

LIU Wei , CUI Jianzhong (Northeastern University , Shenyang , China Manuscript received 10 November , 1994)

金属学报(英文版)

For 2091 Al-Li alloy, the volume fraction of second phase particles is greatly determined by the homogenization temperature and homogenization time under an electric field and the ductility of the alloy is determined by the fraciton of second phase particles. The combined homogenization treatment shortens the homogenization time, reduces the loss ofLi content and increases the ductity of the alloy.

关键词: : homogenization treatment , null , null , null

Steel-Making and Continuous/Ingot Casting Scheduling of Mixed Charging Plan Based on Batch Splitting Policy

LIU Wei , SUN Liang-liang

钢铁研究学报(英文版)

For steel-making and continuous/ingot casting are the key processes of modern iron and steel enterprises, this paper proposes a batch splitting schedule policy to solve continuous and ingot casting schedule of mixed whole/half charging plan for steel making. First establish the model of continuous and ingot casting schedule of mixed whole/half charging plan according to the complex constraints. Then solve this model by heuristic algorithm. Finally use actual data to prove the proposed algorithm′s validity and analyze the application result in steel plant.

关键词: continuous/ingot casting , whole/half charging , batch splitting policy , scheduling

Intergranular Fatigue Cracking Behaviour in Aluminium

LIU Wei , WANG Zhongguang , XIA Yuebo Institute of Matal Research , Academia Sinica , Shenyang , China.

材料科学技术（英）

In order to understand the basic mechanism of intergranular cracking in pure metals during fatigue, stress-controlled push-pull fatigue tests were carried out with high purity aluminium. Tests were interrupted frequently so as to study the grain boundary (GB) cracking behaviour by the surface observation. The results show that crack initiation at GB was a process controlled by multi-factors, such as boundary structure, GB-slip interaction, GB sliding and so on. If these factors are varied so that the incompati- bility at a GB increased, the possibility of cyacking at the boundary will be raised. Some inteygranular cracking phenomena are not able to be explained by the GB stepping mechanism.

关键词: intergranular crack , null , null , null , null

EFFECT OF HOMOGENIZATION TREATMENT UNDER AN ELECTRIC FIELD ON T_1 DISTRIBUTION AND MECHANICAL PROPERTIES OF 2091 Al-Li ALLOY

LIU Wei , CUI Jianzhong(Northeastern University , Shenyang , ChinaManuscript received 10 November 1994)

金属学报(英文版)

Homogenization treatment under an electric field increases the distributive homogeneity of the T1 precipitation and improves the yield strength of 2091 Al-Li alloy.

关键词: :homogenization treatment , null , null , null

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