FRACTURE SURFACE TOPOGRAPHY AND TOUGHNESS OF 4340 STEEL.
Abstract
AISI 4340 steel was heat treated to eight strength levels by tempering groups of specimens at intervals of 100 F between 500 F and 1200 F. Tension, notch tension, and Charpy V-notch impact specimens were machined from these materials and tested over a range of temperatures between that of liquid nitrogen and 400 F. The fracture of each specimen was examined at low magnification and each zone of fracture surface configuration was measured. When plotted as a function of testing temperature, these measurements resulted in transitional curves for all three types of specimens. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1969
- Accession Number
- AD0685836
Entities
People
- Frank L. Carr
- Frank R. Larson
Organizations
- United States Army Research Laboratory