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

Sheng Guo, Chun Ng, C.T. Liu
2013 Materials Research Letters  
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 Al 2 CrCuFeNi 2 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
more » ... 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.
doi:10.1080/21663831.2013.844737 fatcat:x5fxhtvrmbdn7jjxlaoa4pqpwq