Accession Number : ADA139359

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

Descriptive Note : Interim scientific rept. 1 Oct 82-30 Sep 83,

Corporate Author : STANFORD UNIV CA DEPT OF MATERIALS SCIENCE AND ENGINEERING

Personal Author(s) : Nix,W D

PDF Url : ADA139359

Report Date : Feb 1984

Pagination or Media Count : 47

Abstract : The structure and high temperature mechanical properties of oxide dispersion strengthened alloys are being studied. We have observed and studied superplastic properties in fine grained MA 6000 and MA 754. These properties have been described by a model which couples dislocation and diffusional creep. The creep properties of coarse grained MA 754 are also being studied. We have observed that cavitation contributes to the creep rate at low stresses and high temperatures and that grain boundary degradation occurs by diffusional processes. Work on the structure and properties of Al-Fe-Ce alloys is just starting. (Author)

Descriptors :   *Alloys, *Superalloys, *Dispersion hardening, *Strength(Mechanics), *Stresses, *Mechanical properties, High temperature, Oxides, Creep, Creep strength, Plastic properties, Aluminum alloys, Cerium alloys, Iron alloys, Dislocations, Diffusion, Cavitation, Grain boundaries, Degradation

Subject Categories : Metallurgy and Metallography
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE