Evaluation of Sensitivity of Lameller Tearing by Z-direction Cranfield Type Test

Abstract

The Cranfield type test is one of the popular tests for evaluating lamellar tearing of steel plates.
The authors proposed the Z-direction Cranfield type test in which the welded beads are built-up in the through-thickness direction of plate.
By the Z-direction Cranfield type test and the original test method (X-direction test), the relation between the shape and distribution of nonmetallic inclusions and the behavior and propergation of cracks can be made clear.
Lamellar tear sensitivity of steel plates can be evaluated quantitatively with the relationship between the direction and the length of cracks.