Accession Number:

AD0748098

Title:

The Effects of Surface Layer on Plastic Deformation and Crack Propagation

Descriptive Note:

Semiannual rept. Jan-Jul 1972

Corporate Author:

MARTIN MARIETTA AEROSPACE DENVER CO

Personal Author(s):

Report Date:

1972-07-01

Pagination or Media Count:

83.0

Abstract:

Metallographic evidence of the existence of the surface layer is given. A relationship is given between the surface-layer stress and fatigue failure. Surface-layer stress at the root of notches is reported. The crack propagation rate for an iron-silicon alloy is reported. An attempt to detect slip-line formation and strain under sustained loads up to 500 hr. is reported.

Subject Categories:

  • Properties of Metals and Alloys
  • Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE