CREEP AT HIGH TEMPERATURES IN NI-FE ALLOYS ON SOME MODELS OF WORK HARDENING OF SUPERSTRUCTURES.

Abstract

The creep behavior of Ni3Fe and Ni-20 at % Fe alloys has been investigated in the temperature range between, approximately, 530 to 720C. The experimental activation enthalpy for creep was found to be, within the experimental error, in agreement with the available data for diffusion of Fe in Ni-Fe alloys for the case of the Ni-20 at % Fe alloy. For the stoichiometric composition it is suggested that the diffusion of Ni is the controlling factor. It is proposed that dislocation climbing is the rate controlling process for creep in the Ni-20 at % Fe alloy and gliding of dislocations through a short range ordered structure is controlling the creep rate in the Ni-25 at % Fe alloy. Several other experimental results are discussed. (Author)

Document Details

Document Type
Technical Report
Publication Date
Feb 28, 1965
Accession Number
AD0618291

Entities

People

  • Aldo E. Vidoz
  • C. A. Pampillo

Organizations

  • Universidad Nacional de Cuyo

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Agreements
  • Climbing
  • Diffusion
  • Dislocations
  • Enthalpy
  • Hardening
  • High Temperature
  • Superstructures

Fields of Study

  • Materials science
  • Physics

Readers

  • Materials Science and Engineering.