Accession Number:

ADA029374

Title:

Kinetics of the Martensite Transformation in Athermal Fe-C-Ni-Cr Alloys.

Descriptive Note:

Technical rept.,

Corporate Author:

RENSSELAER POLYTECHNIC INST TROY N Y SCHOOL OF ENGINEERING

Personal Author(s):

Report Date:

1976-07-01

Pagination or Media Count:

44.0

Abstract:

An investigation was conducted to study the martensite transformation kinetics of athermal Fe-C-Ni-Cr alloys. The transformation rate was found to be dependent on alloy composition and was a function of 1 the rate of change of chemical free energy with temperature, and 2 the energy expended in deforming the austenite surrounding a growing martensite embryo in order to accommodate the transformational volume and shear strains. Increasing either of these two factors leads to an increase in transformation rate. Also, it was found that the magnitude of the contribution of the deformation energy to the overall nonchemical free energy associated with the transformation depends on the alloy system and specific composition. Author

Subject Categories:

  • Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE