Tensile strength prediction of dual-phase Al0.6CoCrFeNi high-entropy alloys

• DOI: 10.1007/s12613-020-2084-2
• Publication Date: 2020-08-27T16:04:46Z
• Authors: Min Zhang; Jin-xiong Hou; Hui-jun Yang; Ya-qin Tan; Xue-jiao Wang; Xiao-hui Shi; Rui-peng Guo; Jun-wei Qiao
• Keywords: 02 engineering and technology; 0210 nano-technology

The evolution of the microstructure and tensile properties of dual-phase Al0.6CoCrFeNi high-entropy alloys (HEAs) subjected to cold rolling was investigated. The homogenized Al0.6CoCrFeNi alloys consisted of face-centered-cubic and body-centered-cubic phases, presenting similar mechanical behavior as the as-cast state. The yield and tensile strengths of the alloys could be dramatically enhanced to ∼1205 MPa and ∼1318 MPa after 50% rolling reduction, respectively. A power-law relationship was discovered between the strain-hardening exponent and rolling reduction. The tensile strengths of this dual-phase HEA with different cold rolling treatments were predicted, mainly based on the Hollomon relationship, by the strain-hardening exponent, and showed good agreement with the experimental results.