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Sunflower-like Solidification Microstructure in a Near-eutectic High-entropy Alloy

Sheng Guo (Institutionen för material- och tillverkningsteknik, Yt- och mikrostrukturteknik) ; C Ng ; C. T. Liu
Materials Research Letters (2166-3831). Vol. 1 (2013), 4, p. 228-232.
[Artikel, refereegranskad vetenskaplig]

Considering the inherent advantages of eutectic alloys as high-temperature materials, eutectic high-entropy alloys provide a brand new research direction for developing materials to be used in high-temperature environments. Along this line of thinking, the solidification microstructure in a near-eutectic Al2CrCuFeNi2 alloy was studied. A unique sunflower-like eutectic colony structure was observed, where the Ni–Al-rich B2 phase formed as the primary phase with a spherical or ellipsoidal morphology, the Ni–Al-rich B2/Cr-rich A2 eutectics grew on the primary phase in a radial manner, and the primary B2 phase further decomposed into nearly cubic particles dispersed in the matrix at lower temperatures.



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Denna post skapades 2013-11-15. Senast ändrad 2015-12-17.
CPL Pubid: 186878

 

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