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Information × Registration Number 0222U000923, 0117U002131 , R & D reports Title Formation of ierarchic structured states in metalic systems as physical ground of elaboration of competitive constructional and fuctional materials popup.stage_title Head Ivasishin Orest M, Доктор технічних наук Registration Date 21-01-2022 Organization Institute of Metal Physics. G.V. Kurdyumov of the National Academy of Sciences of Ukraine popup.description2 The physical nature of influence of formation of hierarchical structural-phase states (at the atomic, nano-, micro- and macroscopic scale levels) on physical, chemical and mechanical properties of various metal systems is established. Thermal stability of silver nanostructures depending on the crystallographic hierarchy is analyzed. Effect of contact breakage on the destruction of carbine-graphene nanoelements has been established. Firstly, it was obtained that plastic deformation of Fe-30.9% Ni-1.23% C alloy by precipitation method (e = 1.13) causes partial destruction of graphite structure and increases relative content of amorphous carbon along the boundaries of structural elements. Gradient microstructure with relatively low modulus of elasticity, high hardness and satisfactory plasticity was formed in Zr-Ti-Nb-Ta medical alloys by means of ultrasonic shock treatment. Firstly, all known types of martensite in the Ni-Mn-Ga system are combined as different polytypic modifications and a new type of phase diagram is constructed, which allows to predict the type of martensite in this system. In multicomponent TiZrHfCoNiCu compounds, martensite crystals are formed in dendrites during transformation, while interdendritic gaps act as subgrain boundaries. For the first time, compositions of titanium alloys of Ti-Al-Mo-Fe and Ti-Al-Mo-Cr systems were proposed, which allowed to ensure a competitive balance of mechanical properties with commercial alloys. The orders of magnitude of improvement of magnetic properties of amorphous magnetic tapes based on cobalt at annealing up to 730K (manifestation of hierarchy) were obtained. Firstly, the mechanism of dispersion hardening of foundry eutectic (α-Al + Mg2Ge) alloys based on the ternary Al – Mg – Ge system with nanoparticles of Mg2Zn or Al3 phases (Sc, Zr, Hf) was implemented. A new general approach for assessing the stability of multicomponent solid substitution solutions using the parameters of elements was developed. Product Description popup.authors popup.nrat_date 2022-03-09 Close