| Autor: |
Pokrovsky, A.S., Fabritsiev, S.A., Bagautdinov, R.M., Goncharenko, Yu.D. |
| Zdroj: |
Journal of Nuclear Materials; October 1996, Vol. 237 Issue: 1-2 p841-846, 6p |
| Abstrakt: |
The neutron irradiation effect on the mechanical properties, swelling and fracture surface structure of various beryllium grades was studied in the BOR-60 reactor at 340 to 350°C up to a fluence of 7.2 × 1021n/cm2. At a mechanical testing temperature of 400°C there was observed a strong anisotropy of plastic beryllium deformation depending on the direction of sample cutting relative to the pressing direction. An increase of the testing temperature up to 700°C resulted in an abrupt embrittlement of all irradiated samples. In the most part of the surface structure the intercrystallite fracture along the grain boundaries was covered entirely with large pores, 1 to 4 μm in size. It was suggested that the increase rate of pore formation along the grain boundaries resulted from a high-temperature embrittlement under irradiation. |
| Databáze: |
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