A new heat-resistant alloy for aircraft construction has been created at Belgorod State National Research University (BelSU). It retains its strength at a temperature of 800 °C and surpasses analogues in plasticity. A patent has already been obtained for the development. This was reported in the press service of the university.
Existing alloys often do not provide the necessary level of mechanical and functional properties. Researchers noted that one of the promising areas for solving this problem is high-entropy alloys, which consist of five or more elements, unlike traditional analogues.
Such multi-component systems demonstrate high combinations of strength and plasticity. Complex alloys based on refractory elements are of particular interest. They are able to maintain high strength characteristics in a wide temperature range.
The new high-entropy alloy is developed on the basis of six elements — aluminum, titanium, vanadium, chromium, zirconium and niobium. To obtain a homogeneous structure, the alloy was subjected to repeated remelting in a vacuum. The test results confirmed that the material retains high strength values both at room temperature and under conditions of strong heating.
Traditional refractory alloys based on molybdenum, tungsten and tantalum demonstrate high strength, but their plasticity does not exceed two percent, and excessive density limits their application. The material we created is much lighter and at the same time retains good mechanical properties in a wide temperature range.
At room temperature, the alloy demonstrates a tensile strength of 1456 megapascals and a plasticity of 14.7%. When heated to 800 °C, it retains a strength of 1192 megapascals and is able to deform by more than 50% without destruction. For comparison, the VT6 titanium-based aircraft alloy shows strength values at a temperature of 800 °C in the range of 600-800 megapascals.
According to BelSU scientists, their development may allow the creation of competitive parts for aircraft engines and spacecraft.
Earlier, www1.ru reported that a refractory alloy for the aviation industry was created in Russia.
Read materials on the topic:
Boeing and Airbus are not needed: Russian airline will focus only on MC-21
Irkutsk will have to work hard: Aeroflot plans to receive more than 100 MC-21 aircraft
Now on home
Герой России Гарнаев: никто из профессионалов о возобновлении производства на КАЗ всерьёз не говорит
Система отслеживает спутники на высотах до 50 000 км и ведёт за ними наблюдение
The armored vehicle is equipped with a KamAZ-740.35-400 diesel engine with a power of 400 hp.
Constant improvements in avionics, weapons and tactical capabilities will make the aircraft a flexible response to future challenges
The exterior of the KamAZ-54901 features fairings on the cab and chassis for fuel economy
Fighters are in demand both domestically and abroad
Tyazhpromexport and Venezuela Agree on Plant Revival
The company not only completed the state order, but also quickly mastered the production of AK-12K for special forces
Experts have developed a photogrammetric complex with a resolution of less than 1 cm
