AN INVESTIGATION OF THE THERMAL SHOCK BEHAVIOR OF REFRACTORY MATERIALS.
Abstract
An investigation to develop methods of evaluating and predicting the non-steady state thermal stress behavior of refractory materials is described. Hollow cyclindrical specimens are heated on the inside surface by electron bombardment. With this technique, tungsten specimens 0.75 in. I.D. x 1.5 in. O.D. x 0.5 in. high can be heated to melting in less than one second. Temperature profiles through the wall of the specimens and the resulting strains at the outside of the specimens are measured as functions of time. Temperature profiles and the appropriate materials properties are input to computer program to calculate thermal stresses and strains in the specimens. The comparison of the calculated and measured strains provides a means for establishing the validity of experimental and analytical techniques. The thermal stress analysis can be applied to any hollow cyclindrical body with an arbitrary radial temperature gradient through the wall. The variation of material properties with temperature, as well as plasticity and anisotropy, are accounted for in the analysis. The newly developed techniques are demonstrated using extruded tungsten. Also, the experimental results from thermal shock tests are given for several refractory carbides and a number of oxide dispersed tungsten alloys. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1965
- Accession Number
- AD0476967
Entities
People
- J. R. Bohn
- K. R. King
Organizations
- TRW Inc.