SYMPOSIA PAPER Published: 01 January 1987
STP25657S

Tensile and Fracture Properties of EBR-II-Irradiated V-15Cr-5Ti Containing Helium

Source

The alloy V-15Cr-5Ti was cyclotron-implanted with 80 appm He and subsequently irradiated in the Experimental Breeder Reactor (EBR-II) to 30 displacements per atom (dpa). The same alloy was also irradiated in the 10, 20, and 30% cold-worked conditions. Irradiation temperatures ranged from 400 to 700°C. No significant effects of helium on mechanical properties were found in this temperature range although the neutron irradiation shifted the temperature of transition from cleavage to ductile fracture to about 625°C. Ten percent cold work was found to have a beneficial effect in reducing the tendency for cleavage fracture following irradiation, but high levels (20%) were observed to reduce ductility. Still higher levels (30%) improved ductility by inducing recovery during the elevated-temperature irradiation. Swelling was found to be negligible, but precipitates—titanium oxides or carbonitrides—contained substantial cavities.

Author Information

Grossbeck, ML
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN
Horak, JA
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN
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Details
Developed by Committee: E10
Pages: 291–309
DOI: 10.1520/STP25657S
ISBN-EB: 978-0-8031-5017-1
ISBN-13: 978-0-8031-0963-6