The Effects of Base Metal Notch Orientation and Acuity and Weld Porosity on the Dynamic Tear Toughness of A514F Steel.
Abstract
The effects of weld porosity on the dynamic tear properties of A514F steel butt welds were assessed in a program which conducted dynamic tear tests in six areas of experimentation: (1) the base plate steel in the longitudinal and transverse orientations; (2) sound weld metal; (3) weld metal containing clustered porosity; (4) weld metal containing linear porosity; (5) stress-relieved weld metal; and (6) base metal in the longitudinal and transverse directions having fatigue precracked notches. The upper shelf dynamic tear toughness of the base plate was observed to be much greater for specimens with the notchh oriented perpendicular to the final rolling direction than for the specimens with the notch parallel to the final Specimens which had notches precracked in fatigue and oriented parallel to the rolling direction had the same toughness-temperature behavior as specimens that were machine-notched in the same orientation. The toughness values of the fatigue precracked specimens whose notches were perpendicular to the rolling direction were greater than for the same orientation specimens with machined notches. The fatigue precracked specimens had higher temperature ductile-to-brittle transitions than the machine-notched specimens. Weld specimens had upper shelf toughness values which were less than the toughness values of base plate specimens that were notched perpendicular to their rolling direction; however, these values were greater than the toughness values of base plate specimens notched parallel to the rolling direction. Both the clustered porosity and the linear porosity specimens had toughness values somewhat lower than the sound weld specimens.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1977
- Accession Number
- ADA037046
Entities
People
- E. P. Cox
Organizations
- Construction Engineering Research Laboratory