SYMPOSIA PAPER Published: 01 January 1982
STP34376S

The Influence of Neutron Irradiation on the Properties of Beryllium

Source

The room temperature mechanical properties of unirradiated hot and cold isostatically pressed high purity beryllium and Zircaloy-2 are compared in three-point bend tests. For ram displacement rates of 1 mm min−1 beryllium exhibits comparable ductility (outer fibre strain) to that obtained with Zircaloy. However, for faster ram displacement rates (6.25 mm s−1) the beryllium specimen fractured in an elastic manner. Fast (E > 1 MeV) neutron irradiation of a beryllium specimen at 350 K to a fluence of 6.44 × 1024 n m−2 results in a negative growth strain of 0.03% and a loss in ductility. No visible radiation damage was detected by transmission electron microscopy and the observed irradiation growth strain is attributed to the formation of submicroscopic defect clusters.

Author Information

Fleck, RG
Nuclear Metallurgy, Metallurgical Research Department, Ontario Hydro Research Division, Toronto, Ontario, Canada
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Details
Developed by Committee: E10
Pages: 735–748
DOI: 10.1520/STP34376S
ISBN-EB: 978-0-8031-4846-8
ISBN-13: 978-0-8031-0753-3