from the conferences organized by TANGER Ltd.
Samples of Ni3Al based alloys with hypo-stoichiometric composition Ni-24Al and Ni-22Al were directionally solidified at rates of 50 and 70 mm/h. The directionally solidified samples were used for creep tests at 900 °C. Testing was performed under a load of 200 MPa in an argon atmosphere. Due to the fact that materials of this type are used in demanding environments, the selected tests were also performed in argon saturated with water vapour. It can be concluded that the applied atmospheres have no significant effect on the creep behaviour of the studied samples. The Ni-22Al alloy exhibits longer times to rupture than the alloy Ni-24Al under the same testing conditions. No significant differences in the appearance and quantity of corrosion products on the surface of the samples were observed.
Keywords: Ni3Al based alloys, directional solidification, creep, mechanical characteristics© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.