Device and method for detecting workpiece fractures

A device for detecting fractures or corrosion in a workpiece having a non-conductive outer surface. A thin film layer of metallic material comprising a plurality of separate crack detection wires is bonded to the non-conductive surface of the workpiece. A top coating of protective material is applied to the thin film layer to protect the detection wires from abrasion and corrosion. When an electrical current is transmitted through the detection wires, a predictable resistivity pattern is viewable on a monitor. As a fracture propagates through the workpiece causing the crack detection wires to break one-by-one, the change in resistivity of the wires can be monitored and the existence and extent of any fracture or corrosion to the wires determined.