Properties Of Glasses At Elevated Temperatures

Download this report (PDF, 1.54 MB, 48 pages)
Report Number: WADC TDR 56-645 Part 11
Author(s): Kerper, M. J., Eimer, E. H., Scuderi, T. G.
Corporate Author(s): National Bureau of Standards
Date of Publication: 1966-04
Pages: 48
DoD Task:
Identifier: AD0485202

Abstract:
A relationship between the stress at the point of fracture and the size of the mirror on the fracture face of glass rods of varying diameters has been established, and shown not to be affected by a change in the diameter of the rod. The elastic properties of two chemically strengthened glasses were determined. Young's modulus and shear modulus show a sharp drop in the temperature range from 23.9 C (75 F) to 249 C (480 F). Other glasses in the program did not show this inflection. The strength of these glasses as well as the other glasses in the program were determined at -17.8 C (0 F) and -45.6 C (-50 F), with the results showing that the strength increased at these temperatures as compared to the room temperature strength. Creep curves for the chemically strengthened glasses were obtained at 75 F, and appeared similar to those of earlier glasses in the program. Stress-rupture tests on abraded specimens revealed failures at 75% stress level at most test temperatures, but no failures at 67% at 75 F. Unabraded specimens tested only at 75 F, had failures at 90% but not at 75%.

Provenance: IIT

Other options for obtaining this report:

Via the Defense Technical Information Center (DTIC):
A record for this report, and possibly a pdf download of the report, exists at DTIC

Via National Technical Report Library:
This report may be available for download from NTRL. Use the Title from this record to locate the item in DTIC Online

Indications of Public Availability
No digital image of an index entry indicating public availability is currently available
There has been no verification of an indication of public availability from an inside cover statement



Export