HIGH TEMPERATURE DEFORMATION AND FRACTURE BEHAVIOR OF METALS UNDER HIGH STRAIN RATE CONDITIONS
Abstract
A program was initiated to evaluate the high strain rate deformation behavior of Udimet 700, beryllium and tungsten over a wide range of temperatures. High strain rate tests were performed on a modified constant load creep machine. A set of Udimet 700 specimens was cut from the outside of an ingot with the specimen axis tangential to the ingot surface and perpendicular to the ingot axis. Results differ in some respects from those obtained from axial specimens. They clearly indicate a strain rate sensitivity of the deformability of beryllium at all temperatures investigated. At low temperatures, ductility in terms of total elongation decreases with increasing strain rate. A metallographic investigation shows this decrease in deformability is due to the increasing tendency towards brittle fracture. At higher temperatures - 1100 F and higher, the ductility increases with increasing strain rate. Metallographic evidence indicates that intercrystalline cracking is the reason for failure at lower stain rates.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1963
- Accession Number
- AD0426476
Entities
People
- J. M. Dhosi
- N. J. Grant
- R. Widmer