Abstract
HASTELLOY* alloy s is a commercial, solid solu* HASTELLOY is a registered trademark of Cabot Corporation tion-strengthened, nickel-base superalloy developed for applications where oxidation resistance, low thermal expansion and retained ductility after long-time exposure at elevated temperatures are prerequisites. Its typical heat treatment consists of annealing at 1340 K (1950 °F) followed by air cooling to produce an essentially single phase material. When specimens from annealed heats were aged at 810 K (1000 °F) for 1000 to 8000 h and then tensile tested at room temperature, it was found that relative to the annealed condition, the 0.2 pct yield strength had nearly doubled while about 70 pct of the tensile elongation was retained. It is the objective of this note to report on the formation of a long-range ordered phase that caused the observed strengthening.
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References
S. K. Das and G. Thomas:Phys. Status Solidi (a), 1974, vol. 21, pp. 177–90.
G. Wallwork and J. Croll:Review of High-Temperature Materials, J. B. Newkirk, ed., vol. III, no. 2, pp. 89–104, Freund Publ. House Ltd., Israel, 1976.
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Tawancy, H.M. Order-Strengthening in a nickel-base superalloy (hastelloy alloy S). Metall Trans A 11, 1764–1765 (1980). https://doi.org/10.1007/BF02660534
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DOI: https://doi.org/10.1007/BF02660534