MECHANICAL PROPERTIES AT LOW AND HIGH STRAIN RATE OF PE-16 NIMONIC ALLOY IRRADIATED TO 9.2 DPA
The mechanical properties of alloy PE 16 are reported, determined in the strain rate range about 10**- 3- -:- 10 3- s**-1, at ambient, 400 and 500 degrees C, on as-received, thermally aged (9860 hours in sodium at 500 degrees C), irradiated to 9.2 dpa materials. Regarding the irradiated material one observes: - The effect of irradiation consisted in an increase of flow stress ranging between 10 and 30 percent and the reduction of ductility of about 20 percent points with respect to the as-received material. - Strain-rate softening of small value of ambient temperature while it reaches the value of about 15 percent at high temperature. - Dynamic strain ageing with serrations along the flow curves at high temperatures and low strain rate. The high strain rate values of strength of irradiated PE 16 material are not conservative with respect to the low strain rate values. The strain rate softening of the irradiated material seems to be due to: - the dynamic strain ageing which is present at low strain rate and not at high strain rate; - the thermal softening caused by the temperature rise during the adiabatic dynamic testing; - the accentuation of the two preceding phenomena caused by the damage introduced by irradiation.
Bibliographic Reference: THIRTEENTH INTERNATIONAL SYMPOSIUM "EFFECTS OF RADIATION ON MATERIALS", SEATTLE (USA), JUNE 23-25, 1986 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 32472 ORA
Availability: Can be ordered online
Record Number: 1989124135900 / Last updated on: 1987-01-01
Available languages: en