Evolution of icosahedral clusters during the rapid solidification of liquid TiAl alloy
作者： Zhuo-Cheng Xie , Ting-Hong Gao , Xiao-Tian Guo , Xin-Mao Qin , Quan Xie
DOI: 10.1016/J.PHYSB.2014.01.035
关键词: Chemical physics 、 Icosahedral symmetry 、 Alloy 、 Supercooling 、 Structural stability 、 Nucleation 、 Crystal 、 Materials science 、 Amorphous solid 、 Glass transition
摘要: Abstract The evolution characteristics of icosahedral clusters during the rapid solidification TiAl alloy under different cooling rates are investigated based on molecular dynamics simulations. short-range order structural properties liquid and amorphous analyzed by several characterization methods. It is found that rate plays a key role has significant effect glass transition temperature. Simultaneously, medium-range evolutions described in detail quantitative method visualization technology solidification. results reveal have good stability configural continuity process. Furthermore, structures improvements with decreasing rate. block crystal nucleation improve forming ability supercooled liquid.
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