Fracture resistant properties of AerMet steels

The purpose of this study is to report well-controlled experiments conducted to determine the fracture resistant properties of AerMet(R) 100 steels. One of the objectives of this study is to determine the influence of fracture toughness properties on the fracture and fragmentation process. Both sphere impact tests and cylinder expansion test geometry were used to determine the dynamic fracture resistant coefficients. These experiments were conducted at strain rates of similar to 14 x 10(3)/s for the cylinder expansion tests; the strain rates for the sphere impact tests varied over 50 to 100 x 10(3)/s. Fracture resistant coefficients of 60 MPa rootm and 20 MPa rootm are obtained from the cylinder test and the sphere impact test, respectively. These measurements do not agree with the static fracture toughness values reported in the literature. (C) 2001 Elsevier Science Ltd. All rights reserved.