Crack Arrest and Static Fracture Toughness Tests of a Ship Plate Steel
Abstract
The recently standardized ASTM crack arrest fracture toughness test method was modified for use with an Australian low alloy, 700 MPa strength, quenched and tempered steel used for ship plate. Specimens 50-mm thick in longitudinal and transverse orientations were tested at -60 C with various depths of side groove. Specimen configurations somewhat outside the range of the ASTM method were found to be useful for this steel and were suggested ad modifications to the standard method. A different solution and expression for the stress intensity factor was used to evaluate the tests and to develop a method for predicting the crack length at which a running crack will arrest. Good agreement was obtained between the observed and predicted crack lengths at arrest. The wedge-loading arrangement of the crack arrest test procedure was used for static fracture toughness tests. Procedures for static wedge-loading fracture toughness were proposed for use, particularly for comparisons with crack arrest toughness test results obtained under similar test conditions. The static fracture toughness was more than twice the value of crack arrest toughness for the tests in this report.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1991
- Accession Number
- ADA245641
Entities
People
- I. A. Burch
- J. C. Ritter
- John H. Underwood
Organizations
- United States Army Armament Research, Development and Engineering Center