Journal of Failure Analysis and Prevention

, Volume 6, Issue 1, pp 102–110 | Cite as

Columbia tragedy: High-temperature materials chemistry and thermodynamic considerations of the breached wing leading edge

  • E. Opila
  • N. Jacobson
  • G. Jerman
Peer Reviewed Articles
  • 104 Downloads

Abstract

Metallurgical analysis of debris from the leading edge of the breached left wing of the Columbia space shuttle demonstrated that the temperatures inside the leading edge structural subsystem exceeded 1760 °C (3200 °F). A thin, relatively uniform deposit containing aluminum, Inconel, and Cerachrome was found inside most of the reinforced carbon-carbon composite panels. Such deposition indicates the melting and concurrent deposition of spar, attachment hardware, and insulation. In contrast, panel 8 showed thick, nonuniform deposits suggesting this panel was the breach location. The characteristics of these nonuniform deposits provided indications of plasma flow direction and plasma impingement locations and were helpful in establishing the sequence of failure events. In addition, no indications of A286 were found in the deposits inside panel 8. The lack of evidence for A286 suggests that the breach location was remote from the A286 fittings.

Keywords

Columbia debris analysis deposits high-temperature chemistry reinforced carbon-carbon (RCC) thermodynamics wing leading edge 

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References

  1. 1.
    N. A. Toropov and F. Ya Galakhov: “Solid Solutions in the Al2O3-SiO2 System,” Uch. Zap. Kazan. Gos. Univ., No. 1, 1958, pp. 8–11.Google Scholar

Copyright information

© ASM International 2006

Authors and Affiliations

  • E. Opila
    • 1
  • N. Jacobson
    • 1
  • G. Jerman
    • 2
  1. 1.NASA Glenn Research CenterCleveland
  2. 2.NASA Marshall Space Flight CenterHuntsville

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