Accession Number:

ADA083643

Title:

The Effect of Ion Plating and Ion Implantation on the Cyclic Response and Fatigue Crack Initiation of Metals and Alloys.

Descriptive Note:

Technical rept. no. 2 1 Mar 79-29 Feb 80,

Corporate Author:

GEORGIA INST OF TECH ATLANTA FRACTURE AND FATIGUE RESEARCH LAB

Report Date:

1980-04-09

Pagination or Media Count:

59.0

Abstract:

Fatigue crack initiation can be affected by surface phenomena and the possibility exists for improving the fatigue performance by altering the state of the surface without greatly changing bulk properties. This program was initiated on 1 March 1978, with the objective of determining the effect of ion implantation and ion plating on the cyclic stress-strain response and fatigue crack nucleation of a metal substrate. To meet this objective, we have selected surface film-substrate combinations designed to separate the various parameters, e.g., crystal structure, SFE, shear modulus, misfit, residual stress, etc., which control near surface deformation and associated crack initiation. This report summarizes our progress during the period 1 March 1979 - 29 February 1980. Three aspects of the program are discussed 1 The effect of silver and nickel ion plating on the low and high cycle fatigue behavior of polycrystalline copper, 2 x-ray diffraction analysis of ion implanted crystals, and 3 the effect of aluminum-ion implantation on the fatigue crack initiation of polycrystalline copper. Author

Subject Categories:

  • Metallurgy and Metallography
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE