ABSTRACT
As with all other structural materials, attaining sufficient fracture resistance is a vital requirement for high entropy alloys (HEAs), particularly for safety-critical applications. The fracture behaviors of a number of HEAs had been studied in the past decade. While some exhibit unprecedented fracture toughness akin to the toughest materials ever known, others are just like brittle materials. In this chapter, we summarize a decade of investigations of the fracture behaviors of HEAs, broadly covering the characterization of fracture resistance, fractographic characteristics, and fracture mechanisms. The writing is on the basis of the author’s already published review article on the same subject, with some recent advances incorporated.
