Coherent precipitation and stability of cuboidal nanoparticles in body-centered-cubic Al0.4Nb0.5Ta0.5TiZr0.8 refractory high entropy alloy

• Published in: Scripta materialia Vol. 190; pp. 40 - 45
• Main Authors: Wang, Qing, Han, Jincan, Liu, Yufeng, Zhang, Zhongwei, Dong, Chuang, Liaw, Peter K.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.01.2021
• Subjects: Aging; High entropy alloy; Microstructure; Phase transformation; Precipitation; Aging; Phase transformation; Precipitation; High entropy alloy; Microstructure

The present work developed a new body-centered-cubic (BCC)-based Al0.4Nb0.5Ta0.5TiZr0.8 refractory high entropy alloy with coherent precipitation. The formation of cuboidal nanoprecipitates with a size of 25~50 nm in an 873 K-aged alloy is ascribed to a moderate lattice misfit. A Zr5Al3 phase also c...