Publication details

Phase equilibria in the Ni-Al-Cr-Ti system at 1000 and 1100 C

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Year of publication 2004
Type Article in Periodical
Magazine / Source Journal of Alloys and Compounds
MU Faculty or unit

Faculty of Science

Field Physical chemistry and theoretical chemistry
Keywords Intermetallics; Scanning and transmission electron microscopy
Description Design of advanced materials in general calls for better understanding of phase transitions at service temperatures and relevant equilibrium phase diagrams. In the case of multicomponent alloys, it is often necessary to study phase transformations on model systems. NiAlCrX quaternary systems (X = Co, W, Ti, Ta, etc.) are relatively simple yet sufficiently representative models for Nibase superalloys. However, their complete thermodynamic description requires qualified knowledge of thermodynamic parameters for lower order systems as well as higher order correction terms. This work continues our previous studies on NiAlCr(Co,W, Mo) systems. This time it is focused on titanium as the fourth element. Experimental alloys were prepared with respect to gamma + gamma' phases presence and studied by means of analytical electron microscopy after annealing at typical service temperatures. Experimentally identified types of phases are compared with those obtained by means of thermodynamic calculations.
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