A cuboidal B2 nanoprecipitation-enhanced body-centered-cubic alloy Al0.7CoCrFe2Ni with prominent tensile properties

作者：Wang, Qing^*; Ma, Yue; Jiang, Beibei; Li, Xiaona; Shi, Yao; Dong, Chuang; Liaw, Peter K.^*

来源：Scripta Materialia, 2016, 120: 85-89.

DOI：10.1016/j.scriptamat.2016.04.014

• Multi-principal-element alloy
• Alloy design
• Cluster-plus-glue-atom model
• Coherent precipitation
• Mechanical properties

The present work reports a cuboidal B2-coherently-enhanced body-centered-cubic (BCC) alloy Al0.7CoCrFe2Ni with prominent tensile properties at both room (ultimate tensile strength sigma(b) = 1223 MPa and elongation to fracture delta = 7.9%) and high temperatures. This multi-principal-element alloy is developed out of a cluster formula [Al-M-14]Al-1 issued from the cluster-plus-glue-atom model of a BCC structure. Here, the [Al-M-14] cluster is centered by Al, surrounded by fourteen average atoms M = Co1/2Cr1/5Fe2/5Ni1/5, and glued with one Al atom. Its excellent mechanical properties are attributed to a superalloy-like microstructure, characterized by cuboidal B2 nanoprecipitates coherently embedded in the BCC matrix.

• 出版日期2016-7-15
• 单位大连理工大学