Mechanical properties of Haynes Alloy 188 after exposure to LiF-22CaF2, air, and vacuum at 1093 K for periods up to 10,000 hours
- NASA, Lewis Research Center, Cleveland, OH (United States)
As part of a program to provide reassurance that the cobalt-base superalloy Haynes Alloy 188 can adequately contain a LiF-CaF2 eutectic thermal energy storage salt, 4900- and 10,000-hr exposures of Haynes Alloy 188 to LiF-22CaF2, its vapor, vacuum, and air at 1093 K have been undertaken. Following such exposures, the microstructure has been characterized and the 77 to 1200 K tensile properties measured. In addition, 1050 K vacuum creep-rupture testing of as-received and molten salt- and vacuum-exposed samples has been undertaken. Although slight degradation of the mechanical properties of Haynes Alloy 188 due to prior exposure was observed, basically none of the losses could be ascribed to a particular environment. Hence, observed decreases in properties are due to thermal aging effects, not corrosive attack. In view of these findings, Haynes Alloy 188 is still deemed to be suitable for containment of the eutectic LiF-CaF2 thermal energy storage media. 8 refs.
- OSTI ID:
- 6240119
- Journal Information:
- Journal of Materials Engineering and Performance; (United States), Vol. 1:4; ISSN 1059-9495
- Country of Publication:
- United States
- Language:
- English
Similar Records
Tensile properties of Haynes alloy 230 and Inconel 617 after long exposures to LiF-22CaF[sub 2] and vacuum at 1,093 K
Tensile properties and structure of several superalloys after long-term exposure to LiF and vacuum at 1,173 K
Related Subjects
HAYNES 188 ALLOY
MECHANICAL PROPERTIES
CALCIUM FLUORIDES
COBALT ALLOYS
ENERGY STORAGE
HEAT RESISTING ALLOYS
LITHIUM FLUORIDES
MOLTEN SALTS
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
ALLOY-CO36CR22NI22W15FE3
ALLOYS
CALCIUM COMPOUNDS
CALCIUM HALIDES
CHROMIUM ALLOYS
COBALT BASE ALLOYS
CORROSION RESISTANT ALLOYS
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HAYNES ALLOYS
HEAT RESISTANT MATERIALS
IRON ALLOYS
LANTHANUM ADDITIONS
LANTHANUM ALLOYS
LITHIUM COMPOUNDS
LITHIUM HALIDES
MATERIALS
RARE EARTH
RARE EARTH ALLOYS
SALTS
STORAGE
360103* - Metals & Alloys- Mechanical Properties