Some Observations Concerning the Oxidation of the Cobalt-Base Superalloy L-605 (HS-25)

Abstract

The concentration of the minor alloying elements silicon and manganese were found to strongly affect the oxidation behavior of L-605 in the temperature range 1000 deg to 1200 deg C. Silicon Is also dominant in determining the post-aging ductility of this alloy. Plots were developed which indicate that it is possible to optimize both oxidation resistance and ductility of L-605 by restricting the silicon and manganese concentrations to the range 0.1 to 0.4 and 1.4 to 1.65 weight percent, respectively. A mechanism compatible with observed weight gains, scale structures, and scale compositions was proposed for the oxidation of L-605 and similar alloys.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1968
Accession Number
ADA405662

Entities

People

  • Gary D. Sandrock
  • James S. Wolf

Organizations

  • National Aeronautics and Space Administration

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Alloys
  • Aluminum Oxides
  • Body Weight
  • Boric Acids
  • Chemical Synthesis
  • Chemistry
  • Chromium
  • Diffraction
  • High Temperature
  • Materials
  • Metal Oxides
  • Optical Properties
  • Oxidation
  • Oxidation Resistance
  • Solid Solutions
  • X Rays
  • X-Ray Diffraction

Fields of Study

  • Materials science

Readers

  • Powder metallurgy of Titanium alloys.