Accession Number : AD0783497

Title :   Deformation of Steel.

Descriptive Note : Final rept.,

Corporate Author : PHILCO-FORD CORP NEWPORT BEACH CALIF AERONUTRONIC DIV

Personal Author(s) : Koppenaal,T. J.

Report Date : FEB 1974

Pagination or Media Count : 8

Abstract : The object of this program was to determine the factors controlling the strengthening that can be obtained in austenitic steels by the introduction of plastic deformation accomplished prior to austenitizing. After reversion to austenite the yield strength of both the low carbon alloy and the medium carbon steel increased with increasing amounts of prior deformation. The reversion process by itself (without any prior deformation) appreciably strengthens the austenite. The effect of carbon on the strength of reverted austenite is seen to increase with increasing amounts of prior deformation. Without any prior deformation, the structure of the reverted austenite in both alloys appears as a stack of sheared plates with a high dislocation density. The strengthening due to the reversion process alone can be explained on the basis of the observed grain size refinement and increase in dislocation density. The medium carbon steel is further strengthening by the presence of carbides.

Descriptors :   *STEEL, *PLASTIC DEFORMATION, *YIELD STRENGTH, AUSTENITE, CARBON STEELS, CARBIDES, GRAIN SIZE, DISLOCATIONS

Subject Categories : Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE