Molecular‐dynamics simulation of mechanical alloying for the Al50Ti50alloy
作者:
J. Lu,
J. A. Szpunar,
期刊:
Journal of Applied Physics
(AIP Available online 1993)
卷期:
Volume 74,
issue 2
页码: 902-904
ISSN:0021-8979
年代: 1993
DOI:10.1063/1.354885
出版商: AIP
数据来源: AIP
摘要:
The structural ordering development during mechanical alloying of the Al50Ti50alloy was investigated by using molecular‐dynamics computer simulations. Random external forces with both random orientations and magnitudes were used to simulate the mechanical alloying processes and pseudopotential was used as a model for the interaction between the atoms. The results indicate that the final nonequilibrium phase obtained through simulation of mechanical alloying is an amorphous state which can be formed experimentally in the laboratory. The transformation from crystals to amorphous state may locally be a first‐order‐like phase transition, but statistically it is a gradual phase transition due to the characteristics of random external forces which help atoms to overcome their energetic barrier during the mechanical alloying. This means that the transformation occurs in random sites and is discontinuous.
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