Fracture behavior of notched TC21 alloy observed by In-situ SEM

Abstract The fracture behavior of notched TC21 alloy with lamellar microstructure has been investigated during the tensile deformation process. The crack initiates along the α/β interface within the α colony at the notch. And the crack propagates along the slip band or near the colony boundary, which are far away from the notch. The fracture mode is a combination of ductile and quasi-cleavage fractures.