The effects of cold rolling on the evolution of microstructure and the mechanical behavior of Al_0.25CoCrFeNi high-entropy alloys were investigated. Cold rolling resulted in extensive grain elongation, formation of deformation bands within the grains, and development of crystallographic textures that depended on the rolling reduction. The textures were investigated by electron backscattered diffraction after cold rolling. The present cold-rolled alloy indicates a strong brass-type texture. Cold rolling results in a substantial strengthening of the alloy; its ultimate tensile strength approaches 1479 MPa, which was 2.8 times of that in the as-cast condition, but at the expense of low ductility (ε ~ 2.3%).

研究了冷轧对Al _0.25 CoCrFeNi高熵合金组织演变和力学行为的影响。冷轧导致广泛的晶粒伸长，晶粒内形变带的形成以及依赖于轧制压下率的晶体织构的发展。在冷轧后通过电子背散射衍射研究织构。本发明的冷轧合金显示出很强的黄铜型织构。冷轧可大大增强合金的强度。其极限抗拉强度接近1479 MPa，是铸态条件下的2.8倍，但以低延展性为代价（ε〜2.3％）。