HIGH TEMPERATURE STRENGTH PROPERTIES OF COMMERCIAL AND VACUUM MELTED HAYNES ALLOY NO. 25
Technical Report
·
OSTI ID:4840033
Tensile and creep rupture tests in air on commercial air melted Haynes Alloy No. 25 in the solution heat treated condition were in good agreement with commercially published information. Rupture life in sodium at 1500 and 1650 deg F was three to four times the corresponding life in air at the same temperatures. Material tbat was subjected to a simulated diffusion bonding and brazing treatment exhibited a reduction in tensile ductility in tests up to 1000 deg F and normal tensile ductility at 1600 deg F. The tensile and creep-rupture strength of vacuum arc melted material tested in air appeared similar to that of commercial air melted material. Tensile tests on solution heat treated material indicated somewhat lower yield strength when compared to commercial material, although the ultimate strength generally was comparable. Aging at 1400 deg F increased the ultimate and yield strength with no adverse effect on ductility in subsequent tensile tests at 1400 deg F. Aging at temperatures above 1400 deg F did not appear to affect the tensile properties in subsequent tensile tests at the aging temperature. (auth)
- Research Organization:
- Pratt and Whitney Aircraft Div., United Aircraft Corp. Connecticut Aircraft Nuclear Engine Lab., Middletown
- NSA Number:
- NSA-15-031201
- OSTI ID:
- 4840033
- Report Number(s):
- PWAC-351
- Country of Publication:
- United States
- Language:
- English
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