Accession Number : AD0763235

Title :   Phase Instability During Low-Cycle Fatigue.

Descriptive Note : Final rept. 1 Jul 69-30 Jun 72,

Corporate Author : ILLINOIS UNIV URBANA

Personal Author(s) : Altsletter,Carl ; Hennessy,Daniel ; Shah,Dilip

Report Date : 1972

Pagination or Media Count : 4

Abstract : The effect of phase instability on plastic deformation was studied. The long range objective was to determine in what way martensitic and and diffusional transformation during deformation may be used to improve the mechanical properties of high strength steel. Consideration will be given to the transformation of austenite under stress, to the acceleration of diffusional processes by cyclic loading and to the effect of these processes during low cycle fatigue of unstable stainless steel. The program was a careful study of the phase changes and the mechanisms of these changes which take place as a result of plastic deformation of steel, rather than the production of large quantities of empirical data. The results of the program are briefly summarized. (Author)

Descriptors :   (*STAINLESS STEEL, PHASE STUDIES), (*NIOBIUM ALLOYS, PHASE STUDIES), (*COBALT ALLOYS, PHASE STUDIES), DEFORMATION, DISPERSION HARDENING, FRACTURE(MECHANICS), NICKEL ALLOYS

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE