Effect of long periods at high temperatures on the structure and properties of nickel-chromium alloys

Conclusions

• 1. Strengthening the solid solution by increasing the amount of alloyed elements and the formation of moderate amounts of the intermetallic phase in the structure gives a niclel alloy with a high ductility and high resistance to prolonged periods at high temperatures.

• 2. The KhN65VMTYu alloy has a high structural stability and good mechanical properties because of a limited amount of the strengthening phase in the initial state (10%) and after long periods at high temperatures (up to 17%), and also because the coherence of the solid solution and the intermetallic phase is preserved after long periods at 700–800°C.