QUARTERLY PROGRESS REPORT OF THE TECHNOLOGY SECTION-SPECIAL MATERIALS SECTION FOR THE PERIOD OCTOBER 1 TO DECEMBERT 31, 1958
The effect of oxygen on the transformation temperatures for Zircaloy-2 has been determined and is shown. The cold fabricability of Zircaloy-2 containing various levels of oxygen and with various heat treatments has been determined. The results are presented graphically. It was determined that the ductility decreased with increasing oxygen content, independent of heat treatment, and that specimens heated 20 hr at 750 deg C showed the best ductility. It was determined that cast Zircaloy-2 retains dimensional stability after thermal cycling three times at 600 deg F. Cold rolled Zircaloy-2 strip must be pickled a minimum of 0.0005-in. per surface to ensure corrosion reststance. Analysis of tensile data showed that 500 deg F properties cannot be predicted with any degree of confidence from room temperature values. A cursory study of critical grain growth in Zircaloy-2 showed largest grain growth to occur in specimens cold rolled 9% and annealed at75O deg C for 8 hr. The heat treatment behavior of the nickel-free Zircaloy-2 specimens was similar to that of Zircaloy- 2. (For preceding period see WAPD-NCE-666.) (auth)
- Research Organization:
- Westinghouse Electric Corp. Bettis Plant, Pittsburgh
- NSA Number:
- NSA-14-001779
- OSTI ID:
- 4213028
- Report Number(s):
- WAPD-NCE-333-59
- Country of Publication:
- United States
- Language:
- English
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