FRACTOGRAPHY. PART XIII EXAMINATION OF ELEVATEDTEMPERATURE FRACTURE IN A LOW-CARBON FREEMACHINING STEEL.
Abstract
A small cylindrical steel collar adapted for use in a laboratory extrusion die assembly suddenly broke in a brittle manner into two pieces during an extrusion operation in which the temperature of the collar was at 600 F. It was suspected that this was above the transition temperature, and an investigation was made in order to extract such information as might be available and pertain to the problem of similar catastrophic rupturing of pressurized containers at elevated temperature. The electron microscope was employed to characterize the service fracture, which was concluded to have been generated by the growth and coalescence of voids around rod-shaped nonmetallic inclusions. This is an example of a brittle fracture occuring at a temperature too high for the cleavage mode to operate. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1963
- Accession Number
- AD0428137
Entities
People
- E. P. Dahlberg
- J. E. Flint
Organizations
- United States Naval Research Laboratory