Accession Number : AD0770189

Title :   Plastic Deformation of Metals at High Strain Rates. Part I. The Effects of Temperature on the Static and Dynamic Stress-Strain Characteristics in Torsion of 1100-0 Aluminum.

Descriptive Note : Summary rept. Feb 72-Mar 73,

Corporate Author : BROWN UNIV PROVIDENCE R I DEPT OF ENGINEERING

Personal Author(s) : Eleiche,A. M. ; Duffy,J.

Report Date : JUL 1973

Pagination or Media Count : 76

Abstract : A series of tests is described in which tubular specimens of a commercially pure polycrystalline aluminum were loaded in torsion up to shear strains of about 2 and 4% respectively, over the temperature range -180C to 250C. The experimental results give the flow stress in shear, the strain and the strain rate against time. They also give stress-strain curves which are compared to the corrresponding static curves obtained by testing similar specimens in torsion at about 0.001/sec. A graph showing the dependence of flow stress on temperature indicates that there are three different temperature ranges for polycrystalline aluminum within each of which a different deformation mechanism presumably dominates the flow process. (Modified author abstract)

Descriptors :   *Stress strain relations, *Plastic deformation, *Aluminum, Strain rate, Temperature, Torsion

Subject Categories : Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE