Accession Number : AD0618291

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

Descriptive Note : Annual rept. for 1 Mar 64-28 Feb 65,

Corporate Author : UNIVERSIDAD NACIONAL DE CUYO SAN CARLOS DE BARILOCHE (ARGENTINA) INSTITUTO DE

Personal Author(s) : Vidoz,Aldo E. ; pampillo,C. A.

Report Date : 28 FEB 1965

Pagination or Media Count : 10

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)

Descriptors :   (*NICKEL ALLOYS, IRON ALLOYS), (*CREEP, NICKEL ALLOYS), IRON ALLOYS, HIGH TEMPERATURE, STRESSES, HEAT OF ACTIVATION, HARDENING, CRYSTAL DEFECTS

Distribution Statement : APPROVED FOR PUBLIC RELEASE