Accession Number:

ADA080084

Title:

Fracture at Elevated Temperature in Dispersion Strengthened Alloys.

Descriptive Note:

Final technical rept. 1 Oct 75-30 Sep 79,

Corporate Author:

CORNELL UNIV ITHACA N Y DEPT OF MATERIALS SCIENCE AND ENGINEERING

Personal Author(s):

Report Date:

1979-12-03

Pagination or Media Count:

36.0

Abstract:

This report describes important new findings in the understanding of intergranular cavitation and fracture in alloys which derive their creep strength from the presence of hard second phase particles, such as the nickel base superalloys. The work is primarily theoretical but is supported in most instances, by simple experiments on model alloys. Criteria for the nucleation of cavities at high temperature are developed and it is shown that cavities are most likely to nucleate at particles in the grain boundaries.

Subject Categories:

  • Properties of Metals and Alloys
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE