Journal of Materials Engineering and Performance

, Volume 3, Issue 6, pp 754–762 | Cite as

Mechanical properties of haynes alloy 188 after 22,500 hours of exposure to LiF-22CaF2 and vacuum at 1093 K

  • J. D. Whittenberger
Testing and Evaluation


As a continuation of a study of a space-based thermal energy storage system centered on a LiF-CaF2 eutectic salt contained by Haynes alloy 188, this Co-base superalloy was subjected to molten salt, its vapor, and vacuum for 22,500 h at 1093 K. Samples from all three exposure conditions were tensile tested between 77 to 1200 K; in addition, vacuum and molten-salt exposed specimens were vacuum creep rupture tested at 1050 K. Comparison of these mechanical properties with those measured for the as-received alloy reveals no evidence for degradation beyond that ascribed to simple thermal aging of Haynes alloy 188. This behavior is identical to the 10,000 h results (Ref 3); hence, Haynes alloy 188 is a suitable containment material for an eutectic LiF-CaF2 thermal energy storage salt.


Haynes alloy 188 heat treatment long term exposure mechanical properties superalloy thermal energy storage 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    T.L. Labus, R.R. Secunde, and R.G. Lovely, Solar Dynamic Power Module Design, paper No. 899277 in IECEC ’89, Vol 1, Institute for Electrical and Electronic Engineers, New York, 1989, p 299–307Google Scholar
  2. 2.
    J.D. Whittenberger,J. Mater. Eng., Vol 12, 1990, p 211–226CrossRefGoogle Scholar
  3. 3.
    J.D. Whittenberger,J. Mater. Eng. Perform., Vol 1, 1992, p 469–482CrossRefGoogle Scholar
  4. 4.
    J.D. Whittenberger,J. Mater. Eng. Perform., Vol 2, 1993, p 745–757CrossRefGoogle Scholar
  5. 5.
    J.D. Whittenberger,J. Mater. Eng. Perform., Vol 3, 1994, p 91–104CrossRefGoogle Scholar
  6. 6.
    Haynes International Data Sheet for Haynes Alloy 188, Data sheer is available from Haynes International, 1020 West Park Ave., Kokomo, IN 46904-9013, USAGoogle Scholar

Copyright information

© ASM International 1994

Authors and Affiliations

  • J. D. Whittenberger
    • 1
  1. 1.NASA Lewis Research CenterClevelandUSA

Personalised recommendations