Accession Number : AD0766237

Title :   Inhomogeneous Deformation and Strain-Rate Effects in High Strength Trip Steels.

Descriptive Note : Technical rept.,

Corporate Author : ARMY MATERIALS AND MECHANICS RESEARCH CENTER WATERTOWN MASS

Personal Author(s) : Azrin,Morris ; Olson,Gregory B. ; Gagne,Roger A.

Report Date : MAR 1973

Pagination or Media Count : 27

Abstract : AMMRC-TR-73-12DA-1-T-062105-A-528(*steel, deformation), strain(mechanics), austenite, martensite, temperaturehigh strength alloys, steel, stress strain diagrams, trip steelsTensile true stress-strain curves were obtained on high strength TRIP steel for a range of strain rates and test temperatures. It was possible to determine the true-stress and -strain, and strain-rate during periods of Luders band formation, uniform elongation, and final necking. In service, where dynamic loading conditions exist, either the formation of a Luders band must be prevented, or the temperature sensitivity of the material must be decreased if the 'normal' ductility of the material is to be realized. Methods for preventing the formation of a Luders band or reducing temperature sensitivity are discussed. (Modified author abstract)

Descriptors :   (*STEEL, DEFORMATION), STRAIN(MECHANICS), AUSTENITE, MARTENSITE, TEMPERATURE

Subject Categories : Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE