A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Effect of neutron irradiation on the microstructure of tungsten
Two grades of pure tungsten, single and polycrystalline, were irradiated for 282 days in the HFR reactor, Petten, at 900 °C to an average damage level of 1.6dpa. Each grade of tungsten was investigated using the transmission electron microscope (TEM) to assess the effect of neutron irradiation on tungsten microstructure. Investigations revealed the formation of faceted cavities, whose diameter varies from 4 to 14nm in both materials. The cavities are homogeneously distributed only inside single crystalline tungsten. The local distribution of cavities in polycrystalline tungsten is strongly influenced by grain boundaries. The number densities of cavities were measured to be 4×1021 m−3 for polycrystalline and 2.5×1021 m−3 for single crystalline tungsten. This corresponds to volumetric densities of 0.45% and 0.33% respectively. High-resolution transmission electron microscopy (HRTEM) revealed that faces of cavities are oriented in (110) plane. Analytical investigations showed precipitation of rhenium and osmium produced by a transmutation reaction around cavities and at grain boundaries.
Effect of neutron irradiation on the microstructure of tungsten
Two grades of pure tungsten, single and polycrystalline, were irradiated for 282 days in the HFR reactor, Petten, at 900 °C to an average damage level of 1.6dpa. Each grade of tungsten was investigated using the transmission electron microscope (TEM) to assess the effect of neutron irradiation on tungsten microstructure. Investigations revealed the formation of faceted cavities, whose diameter varies from 4 to 14nm in both materials. The cavities are homogeneously distributed only inside single crystalline tungsten. The local distribution of cavities in polycrystalline tungsten is strongly influenced by grain boundaries. The number densities of cavities were measured to be 4×1021 m−3 for polycrystalline and 2.5×1021 m−3 for single crystalline tungsten. This corresponds to volumetric densities of 0.45% and 0.33% respectively. High-resolution transmission electron microscopy (HRTEM) revealed that faces of cavities are oriented in (110) plane. Analytical investigations showed precipitation of rhenium and osmium produced by a transmutation reaction around cavities and at grain boundaries.
Effect of neutron irradiation on the microstructure of tungsten
M. Klimenkov (author) / U. Jäntsch (author) / M. Rieth (author) / H.C. Schneider (author) / D.E.J. Armstrong (author) / J. Gibson (author) / S.G. Roberts (author)
2016
Article (Journal)
Electronic Resource
Unknown
Metadata by DOAJ is licensed under CC BY-SA 1.0
Neutron Irradiation Behavior of Tungsten (Overview)
| British Library Online Contents | 2013
Effect of neutron irradiation on ductility of tungsten foils developed for tungsten-copper laminates
| DOAJ | 2022
Microstructure Development in Neutron Irradiated Tungsten Alloys
| British Library Online Contents | 2011
Effect of self-ion irradiation on hardening and microstructure of tungsten
| DOAJ | 2016
Effect of Nd-YAG laser irradiation on surface microstructure of single crystal tungsten
| British Library Online Contents | 2000