Fig. 5
From: Parametric study of piercing force and surface quality in elastomer-assisted tube piercing
SEM micrograph of the cutting edges in (a) sample T04 (50 Shore A polyurethane tool), and (b) sample T02 (85 Shore A polyurethane tool), along with an SEM micrograph of the fracture cross-section in (c) sample T04, and (d) sample T02.
