Fracture surfaces of irradiated compositesElectron microscopy was used to analyze the fracture surfaces of T300/934 graphite/epoxy unidirectional off-axis tensile coupons which were subjected to 1.0-MeV electron radiation at a rate of 50 Mrad/h for a total dose of 10 Grad. Fracture surfaces from irradiated and nonirradiated specimens tested at 116 K, room temperature, and 394 K were analyzed to assess the influence of radiation and temperature on the mode of failure and variations in constituent material as a function of environmental exposure. Micrographs of fracture surfaces indicate that irradiated specimens are more brittle than nonirradiated specimens at low temperatures. However, at elevated temperatures the irradiated specimens exhibit significantly more plasticity than nonirradiated specimens.
Document ID
19880029742
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Milkovich, Scott M. (Northrop Corp. Defense Systems Div., Rolling Meadows, IL, United States)
Sykes, George F., Jr. (NASA Langley Research Center Hampton, VA, United States)
Herakovich, Carl T. (Virginia Polytechnic Institute and State University Blacksburg, United States)