An Investigation of the Structure and High Temperature Mechanical Properties of Oxide Dispersion Strengthened Alloys.

Abstract

The structure and high temperature mechanical properties of oxide dispersion strengthened alloys are beilng studied. We have studied the creep and fracture properties of Inconel MA754 at very high temperatures. These properties depend both on the size distributions of the Y2O3 dispersoids (whick have been measured with small angle X-ray scattering) and on the morphology of the grain structure. We have also studied the high temperature flow properties of Al-Fe-Ce alloys made by RSR techniques. We have shown that the particles which strength this alloy are monoclinic Al13Fe4. The high temperature strength of the alloy is found to be limited both by coarsing of the precipitates and by precipitate twinning. Efforts to improve the high temperature strength of Al-Fe-Ce by mechanical alloying are underway. These studies include the development of techniques for making TEM thin foils from powders. Originator-supplied keywords include: Oxide dispersion strengthened metals, Solute strengthening, Dispersion strengthening, ODS superalloys, Superplasticity, and Creep strength.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1984
Accession Number
ADA151107

Entities

People

  • W. D. Nix

Organizations

  • Stanford University

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Aluminum Oxides
  • Chemical Analysis
  • Chemistry
  • Creep
  • Creep Strength
  • Crystal Structure
  • Diffraction
  • Materials
  • Materials Engineering
  • Materials Science
  • Mechanical Properties
  • Metallurgy
  • Modulus Of Elasticity
  • Physical Metallurgy
  • Scattering
  • Solid Solutions
  • Stresses

Fields of Study

  • Materials science

Readers

  • Powder metallurgy of Titanium alloys.