Hierarchical Eutectic Structure Enabling Superior Fracture Toughness and Superb Strength in CoCrFeNiNb0.5 Eutectic High Entropy Alloy at Room Temperature

Laves phase is hard but notorious for its brittleness at a low temperature. Over the past decades, a great deal of efforts is paid to toughen Laves phase by forming Lave phase‐based metal–metal composites. In this work, the authors demonstrate that, through the mixing of carefully selected elements, one can obtain the CoCrFeNiNb0.5 eutectic high entropy alloy (EHEA), which exhibits a hierarchical eutectic lamellar structure consisting of Laves...