This report was prepared as an acco~lnt of work sponsored by the United States Government. Neither the United States nor the United States Atomic Energy Com-miss~on, nor any of their employees, nor any of their contractors, subcontractors, or their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, cornpletenes,s or usefulness of any information, apparatus, product or process disclosed, or represents that its use would not infringe privately owned rights. 10. A t a test temperature of 1 3 0 0~~ (704'~) all mechanical properties of the three alloys (except lncoloy-800 total elongation) increased with increasing strain rate after irradiation.,At a test temperature of 1 1 0 0~~ (593°C) all mechanical properties of the irradiated alloys increased with increasing strain rate except the 0.2% yield strength. Response of unirradiated material to variation in strain rate was mixed. P.