At St. Petersburg State Marine Technical University (SPbGMTU) and Skoltech, a new refractory alloy for the aviation industry has been developed that retains its properties over a wide temperature range and is easy to process. This was reported by the press service of the Russian Science Foundation (RSF).
The composition we obtained combines high strength and sufficient ductility in the range from room temperature to one thousand degrees Celsius. It showed unique resistance to strength loss at high temperatures, surpassing industrial refractory and previously known compositionally complex alloys.
Scientists made this discovery during a theoretical study of high-entropy alloys — complex combinations of refractory metals that can outperform traditional nickel- and titanium-based alloys in terms of heat resistance and durability.
Although several similar materials have been created in recent years, many of them suffered from low ductility, which limited their application. To solve this problem, Russian researchers studied the properties of various alloys based on niobium, molybdenum, tantalum, and vanadium. As a result, they synthesized alloys using vacuum arc remelting and performed cold rolling. Four of them showed good machinability.
The alloy with a ratio of niobium, molybdenum, tantalum, and vanadium atoms of 85:5:5:5 proved to be the most promising. It is able to withstand significantly higher loads than existing refractory materials and retains 60% of its strength when heated to 1000 degrees Celsius. This makes the new alloy particularly interesting for use in the aerospace and energy industries.
Earlier, www1.ru reported that UEC revealed the technology of "growing" blades for PD-8 and PD-14 aircraft engines.
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