THERMAL FATIGUE OF DUCTILE MATERIALS. I. EFFECT OF VARIATIONS IN THE TEMPERATURE CYCLE ON THE THERMAL-FATIGUE LIFE OF S-816 AND INCONEL 550. II. EFFECT OF CYCLIC THERMAL STRESSING ON THE STRESS-RUPTURE LIFE AND DUCTILITY OF S-816 AND INCONEL 550

Technical Report · Mon Sep 01 00:00:00 EDT 1958

OSTI ID:4322208

Clauss, F J; Freeman, J W

These two reports were issued separately, but are cataloged as a unit. Tensile specimens of 8-816 and Inconel 550 were alternately heated and cooled while constrained in a manner that prevented Their free axial expansion and contraction, and the number of cycles to fracture was determined. Hardness measuremcnts and microstructural stodies were also made. The number of cycles to failure was more sensitive to changes in the maximum cycle temperature than to changes in the temperature difference. In farther tests, other specimens were treated as described above, except that the thermal cycling was discontinued before failure occurred and the effect measured in relation to the number of cycles. Exposure to thermal-fatigue conditions strengthened S-816 in stress rupture and weakened Inconel 550. (J.R.D.)

• Research Organization: Lewis Flight Propulsion Lab., Cleveland
• NSA Number: NSA-13-002186
• OSTI ID: 4322208
• Report Number(s): NACA-TN-4160; NACA-TN-4165
• Resource Relation: Other Information: These two reports were issued separately, but are cataloged as a unit. Orig. Receipt Date: 31-DEC-59
• Country of Publication: United States
• Language: English

Related Subjects

METALLURGY AND CERAMICS
ALLOY-S-816
ALUMINUM ALLOYS
CHROMIUM ALLOYS
COBALT ALLOYS
COOLING
EXPANSION
FAILURES
FATIGUE
HARDNESS
HEAT RESISTING METALS
HEATING
INCONEL ALLOYS
IRON ALLOYS
MANGANESE ALLOYS
METALLOGRAPHY
MOLYBDENUM ALLOYS
NICKEL ALLOYS
NIOBIUM ALLOYS
STRESSES
TEMPERATURE
TENSILE PROPERTIES
TITANIUM ALLOYS
TUNGSTEN ALLOYS