Study of the Microstructure of High-Entropy Alloys AlFeCuCoNiCrTi_X (x=0, 05, 1.0)

Abstract:

The microstructure of high-entropy Alloys AlFeCuCoNiCrTix (x=0, 05, 1.0) with different titanium contents had been studied. The results showed that: (1) The microstructure of AlFeCuCoNiCrTix exhibited the trend from dendritic structure to eutectic-cell structure as the titanium contents increasing and spinodal decomposition, nanoprecipitation and amorphous phase can be also observed; (2) Composition segregation appeared (especially Cu) and Ti promoted the segregation of Cu; (3) Alloys was consisted of FCC and BCC, and phases gradually converted from FCC+BCC1 to FCC+BCC1+BCC2 with addition of titanium and BCC2 became the leading phase; (4) Both ordering and spinodal decomposition coincided due to the difference of atomic size and high entropy effect.

• Periodical: Applied Mechanics and Materials (Volumes 66-68)
• Pages: 894-900
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.66-68.894
• Online since: July 2011
• Authors: Hong Fei Sun, Nana Guo, Can Ming Wang, Zhong Li Li, Hai Yun Zhu
• Keywords: Amorphous, Dendritic Structure, Nano-Precipitation, Ordering, Spinodal Decomposition

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