IMPACT TESTING AND SLOW NOTCH-BEND TESTING OF ZIRCALOY-2
Sub-size V-notch Charpy impact tests and a notch-bend test were utilized to evaluate some of the effects of specimen orientation, temperature, hydrogen addition, and cold work on Zircaloy-2. At low temperatures the longitudinalvertical (LV) orientation had a higher impact strength than did the transverse-vertical (TV), transverse-horizontal (TH), and longitudinal-horizontal (LH) orientations. At high temperatures, 300 deg C (572 deg F), the transverse- vertical orientation had the highest impact strength. The addition of 100 or 500 ppm hydrogen lowered the impact strength and raised the brittle-to-ductile transttion temperature. Cold working the specimens 12.5% also lowered the impact strength at low temperatures and raised the brittle-to-ductile transition temperature. At high temperatures the impact strength of cold-worked specimens was nearly the same as for annealed specimens. Hydrogen addition and cold work had effects on fracture angle and transition temperature in the notch-bend test similar to their effects on impact strength in the impact test, However, the transition temperature was not raised as much in the notch-bend test as in the impact test. Also, the transverse-horizontal orientation in the notch-bend test had a lower fracture angle than did the other three orientations, particularly for the cold-worked specimens, which fractured at a relatlvely low angle even at 400 deg C (752 deg F). An attempt was made to correlate the notch-bend test with the V-notch Charpy impact test but no correlation was found. (auth)
- Research Organization:
- General Electric Co. Hanford Atomic Products Operation, Richland, Wash.
- DOE Contract Number:
- AT(45-1)-1350
- NSA Number:
- NSA-17-001931
- OSTI ID:
- 4763276
- Report Number(s):
- HW-74339
- Country of Publication:
- United States
- Language:
- English
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