Accession Number : AD0714085

Title :   Dependence of Fatigue Life and Flow Stress on the Microstructure of Precipitation-Hardened Al-Cu Alloys.

Descriptive Note : Summary rept. 1-30 Jun 70,

Corporate Author : RUTGERS - THE STATE UNIV NEW BRUNSWICK N J MATERIALS RESEARCH LAB

Personal Author(s) : Park,B. K. ; Greenhut,V. ; Luetjering,G. ; Weissman,S.

Report Date : AUG 1970

Pagination or Media Count : 57

Abstract : The fatigue and flow stress properties of polycrystalline and single crystal specimens of the Al-3 wt % Cu alloy and of commercial Al2024 alloy were investigated as a function of heat treatment. In order to obtain significant information regarding the interaction of the moving dislocations with the precipitate particles, the specimens were fatigued in push-pull at a constant stress corresponding to 0.5% initial plastic strain. Particular attention was focused upon the dependence of fatigue life of this alloy on size and distribution of the precipitate particles (interparticle distance) and their coherency with the matrix. (Author)

Descriptors :   (*ALUMINUM ALLOYS, MICROSTRUCTURE), FATIGUE(MECHANICS), STRESSES, COPPER ALLOYS, HEAT TREATMENT, DISLOCATIONS, INTERACTIONS

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE