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The Dynamic Response of Oxynitride Glass.
Final rept. Jun 86-Jun 87,
ISRAEL INST OF METALS HAIFA
Pagination or Media Count:
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.
APPROVED FOR PUBLIC RELEASE