EXPLOSION TEAR TEST STUDIES OF HIGH-STRENGTH Q and T STEELS
Abstract
Cleavage (brittle) fractures, have been investigated extensively. Proof-test failures involving 'low energy shear' fractures have been encountered under conditions of near-yield-point loading for structures (rocket cases) which utilized high-strength materials. This investigation was undertaken to develop a test method which would provide for the evaluation of tearing characteristics under explosive loadings for steels ranging in yield strength from 100 to 150 ksi. A new test, the explosion tear test, was developed. Preliminary results demonstrate that high-strength materials differ widely in tearing resistance. The relationship of Charpy V shelf level to tearing resistance has been examined. Shelf-level values significantly less than 40 to 50 ft-lb are shown to correlate with low energy shear characteristics in the explosion tear test. The quantitative correlation of Charpy V shelf level to tearing resistance of high- strength steels, however, is disclosed to be more complex than originally presumed. The complications, involving a yield-strength dependency and other factors, are discussed.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 06, 1962
- Accession Number
- AD0285496
Entities
People
- A. J. Babecki
- P. P. Puzak
Organizations
- United States Naval Research Laboratory