Accession Number : AD0737262

Title :   Effect of Cyclic Transformation Treatments on the Structure and Mechanical Properties of Steels.

Descriptive Note : Technical rept.,

Corporate Author : MANLABS INC CAMBRIDGE MASS

Personal Author(s) : Kulin,S. Andrew ; Kreder,Konstantin

Report Date : OCT 1971

Pagination or Media Count : 87

Abstract : Cyclic transformation experiments have been conducted on three steels. Marked increases in strength properties occur with transformation cycling. This effect then remains constant or decreases somewhat with large numbers of transformation cycling. Ductility and fracture toughness values do not degrade with cyclic strengthening. Prior austenite grain size and martensitic cell lath sizes decrease rapidly to very small values upon cyclic treatment. Also, the number and intensity of dislocation tangles in the cycled martensite increase with such treatments. This type of strengthening, with toughness retention, indicates promise for this method of processing in the achievement of high strength levels in steels. (Author)

Descriptors :   (*HEAT TREATMENT, *STEEL), PHASE STUDIES, HARDENING, TENSILE PROPERTIES, MICROSTRUCTURE, IMPACT TESTS

Subject Categories : Fabrication Metallurgy

Distribution Statement : APPROVED FOR PUBLIC RELEASE