Accession Number : ADA183910

Title :   The Dynamic Response of Oxynitride Glass.

Descriptive Note : Final rept. Jun 86-Jun 87,

Corporate Author : ISRAEL INST OF METALS HAIFA

Personal Author(s) : Yeshurun,Y ; Brandon,David G

PDF Url : ADA183910

Report Date : Jun 1987

Pagination or Media Count : 14

Abstract : Plate impact experiments were performed on two grades of oxynitride glass. Material manganin guages were used to determine the dynamic response of this material in the range of 0 to 12 GPa. In the high stress range the measured stress signals showed that the transmitted waves are composed of an initial elastic jump followed by stress relaxation and a subsequent 'plastic' wave. The 'plastic' transition occured at 9.0 + or - 0.2 GPa for a 6.0 at % nitrogen glass and at 10.4 + or - 0.3 GPa for a 3.3 at % nitrogen glass. This behaviour is characteristic of ductile metals, but is seldom observed in glasses. The Hugoniot curves for both the above nitrogen compositions were determined in the range of 0 to 1 GPa and their spall strength in this pressure regime was estimated from the manganin guage record.

Descriptors :   *GLASS, *DYNAMIC RESPONSE, DUCTILITY, ELASTIC PROPERTIES, MANGANIN, PLASTIC PROPERTIES, STRESS RELAXATION, STRESSES, PLASTICS, TRANSITIONS, PRESSURE, SIGNALS

Subject Categories : Ceramics, Refractories and Glass
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE