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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 11    No. 1    February 2001

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Simulation study on transition mechanisms of microstructures
during forming processes of amorphous metals
ZHENG Cai-xing(郑采星)1, LIU Rang-su(刘让苏)1
DONG Ke-jun(董科军)1,PENG Ping(彭  平)1
LIU Hai-rong(刘海蓉)2,XU Zhong-yu(徐仲榆)

1. Department of Physics, Hunan University, Changsha 410082, P.R.China;
2. Department of Chemistry, Hunan University, Changsha  410082, P.R.China;
3. Department of Basic Courses, Changsha Communications Institute, Changsha 410076, P.R.China

Abstract:For the first time, a molecular dynamics simulation study of 50000 atoms has been performed for the transition mechanisms of the microstructure configurations of liquid metal Al during forming processes of amorphous state by rapid cooling. Not only have various bond-types been researched, but also icosahedra, defective icosahedra and Frank Kasper polyhedra cluster structures were discussed. A very clear picture of how the metal atoms gather to form clusters and how the clusters evolve further has been obtained. Some discussion corresponding to the microscopic mechanisms of the simulation results was also given. These will give an important enlightenment to understand the forming mechanisms and their microscopic processes of amorphous structures.

 

Key words: amorphous metals; microstructures; transition mechanism; computer simulation

ISSN 1672-7029
CN 43-1423/U

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