STRUCTURAL DAMAGE IN THERMALLY CYCLED RENE 41 AND ASTROLOY SHEET MATERIALS

Technical Report · Mon Feb 29 04:00:00 EST 1960

OSTI ID:4147216

Moon, D P; VanEcho, J A; Simmons, W F; Barker, J F

Stress-rupture life at 1650 deg F and tensile properties at room temperature and at 1400 deg F were used to determine the extent of structural damage in thermally cycled Rene 41 and Astroloy sheet materials Solution-treated and aged Rene 41 was tested both in the heat-treated condition and after exposure to 10 or l00 thermal cycles betwein 1350 and 1750 or 1875 deg F. All of the conditions of thermalcycling exposure caused at least some loss in the strength of this material. Metallographic examination indieated that over-aging was primarily responsible for the damage at 1750 deg F Resolution of the Ni/sub 3/(Al. Ti) precipitate and depletion of the alloy by surface oxidation were found to be the damaging mechanisms at 1875 deg F. Solution-treated and aged Astroloy was evaluated in the same manner in the heattreated condition and after 10 thermai cycles between 1350 and 1875 F. No loss of strength was incurred by- this expesure. but over-aging was observed and would probably- have caused structural damage with further exposure. (auth)

• Research Organization: Battelle Memorial Inst. Defense Metals Information Center, Columbus, Ohio
• NSA Number: NSA-14-011976
• OSTI ID: 4147216
• Report Number(s): DMIC-126; PB-151083
• Country of Publication: United States
• Language: English

Related Subjects

ALUMINUM ALLOYS
ASTROLOY
DECOMPOSITION
FAILURES
HEAT TREATMENTS
HIGH TEMPERATURE
INTERMETALLIC COMPOUNDS
LOSSES
MATERIALS TESTING
METALLOGRAPHY
METALS, CERAMICS, AND MATERIALS
NICKEL ALLOYS
OXIDATION
PRECIPITATION
QUANTITATIVE ANALYSIS
QUANTITY RATIO
REACTION KINETICS
RENE ALLOYS
SHEETS
STRESSES
SURFACES
TEMPERATURE
TENSILE PROPERTIES
TITANIUM ALLOYS