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Date of Award

4-1978

Degree Type

Thesis

Degree Name

Master of Engineering (ME)

Department

Metallurgy

Supervisor

J.S. Kirkaldy

Abstract

PubIished standard free energy changes and activity data for iron and its binary and ternary alloys have been used to evaluate the general linear series (Wagner) expansion of the activity coefficient and these were employed in turn for the accurate thermodynamic determinations of the liquids line and the field in steels with additions of Mn, Si, Ni, Cr, Mo, Cu, V, Nb and Co. Computer programs based on several derived analytic formulae were used to predict multicomponent constant composition and isothermal phase diagrams for total alloy additions up to 5 wt%.

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