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Time of Flight Measurements of Unirradiated and Irradiated Nuclear Graphite under Cyclic Compressive Load
- Source :
- Bodel, W, Atkins, C & Marsden, B 2017, ' Time of Flight Measurements of Unirradiated and Irradiated Nuclear Graphite under Cyclic Compressive Load ', Journal of Nuclear Materials, vol. 487, pp. 50-67 . https://doi.org/10.1016/j.jnucmat.2016.12.044
- Publication Year :
- 2017
-
Abstract
- The time-of-flight technique has been used to investigate the stiffness of nuclear graphite with respect to the grade and grain direction. A loading rig was developed to collect time-of-flight measurements during cycled compressive loading up to 80% of the material's compressive strength and subsequent unloading of specimens along the axis of the applied stress. The transmission velocity (related to Young's modulus), decreased with increasing applied stress; and depending on the graphite grade and orientation, the modulus then increased, decreased or remained constant upon unloading. These tests were repeated while observing the microstructure during the load/unload cycles. Initial decreases in transmission velocity with compressive load are attributed to microcrack formation within filler and binder phases. Three distinct types of behaviour occur on unloading, depending on the grade, irradiation, and loading direction. These different behaviours can be explained in terms of the material microstructure observed from the microscopy performed during loading.
- Subjects :
- 010302 applied physics
Nuclear and High Energy Physics
Materials science
Modulus
Stiffness
02 engineering and technology
021001 nanoscience & nanotechnology
Microstructure
musculoskeletal system
01 natural sciences
Stress (mechanics)
Compressive strength
Nuclear Energy and Engineering
Nuclear graphite
0103 physical sciences
medicine
General Materials Science
Graphite
Irradiation
medicine.symptom
Composite material
0210 nano-technology
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Bodel, W, Atkins, C & Marsden, B 2017, ' Time of Flight Measurements of Unirradiated and Irradiated Nuclear Graphite under Cyclic Compressive Load ', Journal of Nuclear Materials, vol. 487, pp. 50-67 . https://doi.org/10.1016/j.jnucmat.2016.12.044
- Accession number :
- edsair.doi.dedup.....5cebe09cbba7f778aeffe4ab45c561fa