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The long-term thermal stability of thermo-span alloy

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  • Thermal Stability
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Abstract

In order to evaluate the long-term thermal stability of Thermo-Span® alloy—an age-hardenable, Fe-Co-Ni-based superalloy—heat-treated samples were exposed for 1,500 hours at temperatures ranging from 480°C to 675°C. Evaluations included tensile tests at room temperature, 595°C, and 650°C; stress-rupture tests at 675°C; and post-creep tensile tests at 620°C. The results showed that Thermo-Span alloy exhibits stable tensile properties and microstructure after 1,500 hour exposures at temperatures within the range of 480°C to 675°C. No embrittlement occurred at any temperature. Exposure at 675°C did not degrade stress-rupture properties. Neither stressed nor unstressed exposures at 620°C had a significant effect on tensile properties at 620°C.

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References

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Authors and Affiliations

  1. Carpenter Specialty Alloys, USA

    R. B. Frank (specialist in high-temperature alloy R&D)

Authors
  1. R. B. Frank
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Author’s Note: Thermo-Span is a registered trademark of CRS Holdings, a subsidiary of Carpenter Technology Corporation.

For more information, contact R.B. Frank, Carpenter Specialty Alloys, 1600 Centre Avenue, Reading, Pennsylvania 19612-4662; (610)208-2696; fax (610) 736-7148; e-mail rfrank@cartech.com.

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Frank, R.B. The long-term thermal stability of thermo-span alloy. JOM 52, 37–39 (2000). https://doi.org/10.1007/s11837-000-0113-1

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  • DOI: https://doi.org/10.1007/s11837-000-0113-1

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