Accession Number : AD0612786

Title :   PLASTIC DEFORMATION AND MARTENSITIC TRANSFORMATION IN IRON ALLOYS.

Descriptive Note : Final rept. for Jan 63-Dec 64,

Corporate Author : FRANKLIN INST PHILADELPHIA PA LABS FOR RESEARCH AND DEVELOPMENT

Personal Author(s) : Breedis,John F. ; Lawley,Alan ; meakin,John D.

Report Date : FEB 1965

Pagination or Media Count : 85

Abstract : An electron transmission study has been made of the martensite transformation in a series of stainless steels. The influence of chemical composition on martensite morphology has been investigated and the composition ranges which transform to lath, surface and plate martensite determined. Using polycrystalline samples of two compositions which transform to lath martensite, an investigation was conducted into the influence of prior plastic deformation on martensite formation. This is of course a contribution to the fundamental understanding of the ausforming process. A further investigation in this area was an examination of the transformation which occurs during plastic deformation at temperatures approaching the M sub s. These experiments were performed on single crystals of the composition Fe-17Cr-16Ni. Finally, transmission studies were carried out to determine the processes occuring during reversion of an Fe-16Cr-12Ni alloy heated in the temperature range 500 to 900 C. (Author)

Descriptors :   (*STAINLESS STEEL, MARTENSITE), (*MARTENSITE, PHASE STUDIES), (*DEFORMATION, MARTENSITE), ELECTRON MICROSCOPY, CHROMIUM ALLOYS, NICKEL ALLOYS, TRANSFORMATIONS, MICROSTRUCTURE, AUSTENITE, CRYSTAL DEFECTS, SINGLE CRYSTALS, SURFACE PROPERTIES

Distribution Statement : APPROVED FOR PUBLIC RELEASE