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NUCLEATION BEHAVIOR OF Al8Fe4Nd PHASE IN RAPIDLY SOLIDIFIED AI-Fe-V-Si-Nd ALLOY |
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| Authors: | H.Pang Z.H.Jin J.N.Deng M.G.Zeng |
| Affiliation: | 1. S henyang National Laboratory for Material Science, Institute of Metal Research, CAS, Shenyang 110016,China; College of Science, Northeastern University, Shenyang 110004, China 2. S henyang National Laboratory for Material Science, Institute of Metal Research, CAS, Shenyang 110016,China 3. College of Science, Northeastern University, Shenyang 110004, China |
| Abstract: | The microstructure of Al-Fe- V-Si-Nd alloy prepared by rapid solidification (RS) pro-cessing was studied by X-ray diffraction (XRD), transmission electron microscopy(TEM) and high resolution electron microscopy (HREM). The phase selection of thealloy during solidification and the nucleation behavior of Al8Fe4Nd phase were ana-lyzed witinin the framework of time-dependent nucleation theory. The incubation timefor Al8Fe4Nd phase was found shorter and the nucleation rate higher than those ofα-Al. The results indicate the nucleation of Al8Fe4Nd phase is heterogeneous and thedispersoids of Al8Fe4Nd form as primary particles from the liquid, which is consistentwith experimental observation. |
| Keywords: | Al-Fe based alloy rapid solidification phase selection nucleation behavior |
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