Accession Number : AD0762361

Title :   Solid-State Chemical Reactions in Alloy Steels at Elevated Temperatures.

Descriptive Note : Final rept. 1 Apr 70-31 Mar 73,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF METALLURGY AND MATERIALS SCIENCE

Personal Author(s) : Chipman,John ; Elliott,John F.

Report Date : 05 JUN 1973

Pagination or Media Count : 18

Abstract : The principal 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. A secondary objective was the thermodynamic treatment of solutions of interstitial and non-metallic elements in metallic solvents. The interstitial element is carbon dissolved in f.c.c. iron, and recent interest has centered on the effects of alloying elements. For such a solution, the usual form of Henry's law must be modified and a new and relatively simple thermodynamic treatment has been developed. (Author)

Descriptors :   (*STEEL, *PHASE STUDIES), AUSTENITE, HEAT TREATMENT, SOLID SOLUTIONS, SOLUBILITY, CARBIDES

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE