2020 Volume 61 Issue 5 Pages 807-819
Recent progress in the development of advanced materials based on the study of CALPHAD approach to the phase diagrams and microstructural control is presented. Thermodynamic databases on the Fe–S based system, Fe–Mn–Al based alloys, Cu-based alloys and Co-based superalloys have been constructed. By utilizing these databases and information on phase diagrams, the following advanced materials have been designed and developed; (i) Schaeffler-type Ti-based alloys, (ii) Pb-free machinable stainless steels using titanium carbosulphide, (iii) high strength Fe–Mn based alloys with low density, (iv) FSW (Friction Stir Welding) tool using Co-based superalloy strengthened by γ′ (Co3 (Al, W)) phase, (v) Ni based metamagnetic shape memory alloys, (vi) Cu–Ni–Al based alloys with high strength and high electronic conductivity strengthened by γ′ (Ni3Al) phase, and (vii) Ingrown nail correcting device and seismic application using Cu–Al–Mn based shape memory alloys. The alloy design and practical application of these materials focussing on the use of phase diagrams have been presented.
