High-Temperature Area of the Fe-Ni-Co-Cu Phase Diagram: Experimental Study and Computer Design

Experimental study of phase equilibria in quaternary Fe-Ni-Co-Cu system has been carried out using differential thermal analysis, scanning electron microscopy and energy dispersive x-ray spectrometry. Experimental data obtained for several synthesized alloys in the Fe-Ni-Co-Cu system have been used for plotting the liquidus and solidus hypersurfaces projections also for design and verification of the T-x-y-z phase diagram. The 4D geometrical description of the Fe-Ni-Co-Cu system, plotted with applying fundamental geometrical principles of phase diagrams design, facilitates visualization of the liquidus and solidus hypersurfaces in 2D and 3D formats, and the entire four-dimensional T-x-y-z phase diagram using any 2D or 3D sections.