THERMODYNAMICS OF PRECIPITATION AND TRANSFORMATION IN SOLID STEELS.
Abstract
The objective of the project was to secure accurate laboratory data which could serve as a basis for a complete thermodynamic description of the changes occurring in the heat treatment of carbon and alloy steels. The important changes considered are the transformations from liquid to solid, and from austenite to ferrite, and precipitations of graphite, cementite and other carbides from the liquid or solid phases, particularly from austenite. These changes and combinations thereof control the ultimate structure and, hence, the strength and toughness of the steel. The classic approach to the problem utilizes phase diagrams to show the limits of composition and temperature for each phase of the alloy system under equilibrium conditions. A second objective was the development of a method of computation which makes such diagrams unnecessary. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 05, 1970
- Accession Number
- AD0706909
Entities
People
- John Chipman
- John F. Elliott
Organizations
- Massachusetts Institute of Technology