Search academic texts

Information × Registration Number 0223U001713, 0121U111997 , R & D reports Title Resource-saving synthesis technologies, features of structure formation and properties of high-entropy alloys based on powder mixtures of ferroalloys popup.stage_title Head Marich Miroslav V., Кандидат технічних наук Registration Date 02-02-2023 Organization Institute of Problems of Materials Science named after IM Frantsevich of the National Academy of Sciences of Ukraine popup.description2  During the work, a fundamentally new approach to the selection of components of high-entropy alloys was implemented. Alloys were made from mixtures of ferroalloys with a high content of Cr and Ti (ФХ800 and ФТи70, respectively), as well as with the addition of metals - Ni and Mn (Мн95). Experimental samples of the alloy ФХ800-ФTи70-Ni (chemical composition – TiCrFeNiC) and alloy ФХ800-ФTи70-Mн95 (chemical composition – TiCrFeMnC) were produced using two methods – hot forging and arc remelting. Peculiarities of their structure formation and phase composition depending on the method of production and annealing temperature were investigated. The main physical and mechanical properties of the synthesized alloys were also determined and compared with similar modern alloys of this class. In the process of determining the dry abrasive wear resistance, it was established that the mass wear of the hot-forged ФХ800-FTи70-Mн95 alloy (without annealing), depending on the friction speed, is 3.9-4.2 times lower than that of the control sample - ШХ15 steel, which has a hardness of 60 HRC. High indicators of wear resistance of these alloys are due to the presence of carbide and intermetallic phases in their structure. In general, wind turbines made of powder mixtures of ferroalloys have quite high mechanical properties, but their main drawback is increased fragility, as evidenced by the results of crack resistance determination. Using resource- and energy-saving approaches to the production of multicomponent high-entropy alloys in contrast to existing energy-consuming technologies (multiple remelting of the initial charge, long-term, mechanical alloying), thanks to the creation of a structure with significant distortions of the crystal lattice and the formation of dispersed carbides in situ, a high level of material strength was achieved compared to alloys of this class. Product Description popup.authors Makarenko Olena S. Myslyvchenko Oleksandr M. popup.nrat_date 2023-02-02 Close