Abstract
A program for rendering ternary phase equilibria in 3-point perspective was developed using Microsoft Visual Basic. Algorithms for rendering and phase analysis are described. With the software, liquidus, subliquidus, and solidus surfaces can be generated, and the three-dimensional object can be rotated to any angle for viewing. The operator can select a composition on the top-view 2-dimensional projection, and surfaces pertinent to an isoplethal study will be displayed. A phase analysis plot is simultaneously displayed wherein relative proportions and compositions of phases are enumerated for any chosen temperature. Phase analysis calculations were based on methods of analytical geometry using best-fit polynomials for liquidus surfaces and their contact boundaries. Phase analysis involved separation into one of five possible modes of phase evolution during cooling.
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