Anna Korneva
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View article: Green Electronics Soldering by Application of Third Generation Lead-Free Solder Alloys: Studies on Their Wettability and Interface Microstructure Formed with Copper
Green Electronics Soldering by Application of Third Generation Lead-Free Solder Alloys: Studies on Their Wettability and Interface Microstructure Formed with Copper Open
Due to the regulations restricting the use of lead, the implementation of lead-free solders became a legal requirement more than 15 years ago. In addition to the well-known SAC305 solder, new alloys containing various concentrations of Bi,…
View article: Precise spectral directional infrared emissivity of a Cantor high-entropy alloy
Precise spectral directional infrared emissivity of a Cantor high-entropy alloy Open
The multicomponent equiatomic CrMnFeCoNi alloy was proposed by B. Cantor almost 20 years ago and was the first in the family of the so-called multiprincipal or high-entropy alloys (HEAs). Various mechanical properties of the Cantor alloy a…
View article: Severe plastic deformation for producing superfunctional ultrafine-grained and heterostructured materials: An interdisciplinary review
Severe plastic deformation for producing superfunctional ultrafine-grained and heterostructured materials: An interdisciplinary review Open
Ultrafine-grained and heterostructured materials are currently of high interest due to their superior mechanical and functional properties. Severe plastic deformation (SPD) is one of the most effective methods to produce such materials wit…
View article: Effect of High-Pressure Torsion on Phase Formation and Mechanical Properties of a High-Entropy TiZrHfMoCrCo Alloy
Effect of High-Pressure Torsion on Phase Formation and Mechanical Properties of a High-Entropy TiZrHfMoCrCo Alloy Open
This investigation delved into the alterations in the mechanical properties of a TiZrHfMoCrCo high-entropy alloy due to phase transformations induced by high-pressure torsion (HPT). The alloy’s genesis involved levitation melting within an…
View article: Influence of the Phase Composition of Titanium Alloys on Cell Adhesion and Surface Colonization
Influence of the Phase Composition of Titanium Alloys on Cell Adhesion and Surface Colonization Open
The pivotal role of metal implants within the host’s body following reconstructive surgery hinges primarily on the initial phase of the process: the adhesion of host cells to the implant’s surface and the subsequent colonization by these c…
View article: Review - Phase Transitions in Ti Alloys Driven by the High Pressure Torsion
Review - Phase Transitions in Ti Alloys Driven by the High Pressure Torsion Open
The high pressure torsion (HPT) of various binary Ti alloys with β-stabilizers (Fe, Co, Ni, Mo, Nb) was studied. Before HPT, the samples were annealed and contained (i) pure β-phase, (ii) α+β mixture with different portion of phases, (iii)…
View article: Grain Boundary Wetting by the Second Solid Phase: 20 Years of History
Grain Boundary Wetting by the Second Solid Phase: 20 Years of History Open
Grain boundaries (GBs) can be wetted by a second phase. This phase can be not only liquid (or melted), but it can also be solid. GB wetting can be incomplete (partial) or complete. In the case of incomplete (partial) wetting, the liquid fo…
View article: Omega Phase Formation and Mechanical Properties of Ti–1.5 wt.% Mo and Ti–15 wt.% Mo Alloys after High-Pressure Torsion
Omega Phase Formation and Mechanical Properties of Ti–1.5 wt.% Mo and Ti–15 wt.% Mo Alloys after High-Pressure Torsion Open
The paper analyzes the effect of severe plastic deformation by the high-pressure torsion (HPT) on phase transformations, in particular, on the formation of the ω-phase, and on mechanical properties, such as hardness and Young’s modulus, in…
View article: High Entropy Alloys for Energy Conversion and Storage: A Review of Grain Boundary Wetting Phenomena
High Entropy Alloys for Energy Conversion and Storage: A Review of Grain Boundary Wetting Phenomena Open
The multicomponent alloys with nearly equal concentration of components, also known as high entropy alloys (HEAs), were first proposed 22 years ago. The HEAs quickly became very important in materials science due to their unique properties…
View article: Formation and Thermal Stability of the ω-Phase in Ti–Nb and Ti–Mo Alloys Subjected to HPT
Formation and Thermal Stability of the ω-Phase in Ti–Nb and Ti–Mo Alloys Subjected to HPT Open
This paper discusses the features of ω-phase formation and its thermal stability depending on the phase composition, alloying element and the grain size of the initial microstructure of Ti–Nb and Ti–Mo alloys subjected to high-pressure tor…
View article: High Entropy Alloys Coatings Deposited by Laser Cladding: A Review of Grain Boundary Wetting Phenomena
High Entropy Alloys Coatings Deposited by Laser Cladding: A Review of Grain Boundary Wetting Phenomena Open
High-entropy alloys (HEAs) are called also alloys without a main component or multiprincipal alloys. They consist of five, six or more components in more or less equal proportions and possess unique properties. Several dozens of thousands …
View article: Grain Boundary Wetting Phenomena in High Entropy Alloys Containing Nitrides, Carbides, Borides, Silicides, and Hydrogen: A Review
Grain Boundary Wetting Phenomena in High Entropy Alloys Containing Nitrides, Carbides, Borides, Silicides, and Hydrogen: A Review Open
In this review, we analyze the structure of multicomponent alloys without principal components (they are also called high entropy alloys—HEAs), containing not only metals but also hydrogen, nitrogen, carbon, boron, or silicon. In particula…
View article: Grain Boundary Wetting by a Second Solid Phase in the High Entropy Alloys: A Review
Grain Boundary Wetting by a Second Solid Phase in the High Entropy Alloys: A Review Open
In this review, the phenomenon of grain boundary (GB) wetting by the second solid phase is analyzed for the high entropy alloys (HEAs). Similar to the GB wetting by the liquid phase, the GB wetting by the second solid phase can be incomple…
View article: The Grain Boundary Wetting Phenomena in the Ti-Containing High-Entropy Alloys: A Review
The Grain Boundary Wetting Phenomena in the Ti-Containing High-Entropy Alloys: A Review Open
In this review, the phenomenon of grain boundary (GB) wetting by melt is analyzed for multicomponent alloys without principal components (also called high-entropy alloys or HEAs) containing titanium. GB wetting can be complete or partial. …
View article: The Phase Transformations Induced by High-Pressure Torsion in Ti–Nb-Based Alloys
The Phase Transformations Induced by High-Pressure Torsion in Ti–Nb-Based Alloys Open
The study of the fundamentals of the α → ω and β → ω phase transformations induced by high-pressure torsion (HPT) in Ti–Nb-based alloys is presented in the current work. Prior to HPT, three alloys with 5, 10, and 20 wt% of Nb were annealed…
View article: The Enrichment of (Cu, Sn) Solid Solution Driven by High-Pressure Torsion
The Enrichment of (Cu, Sn) Solid Solution Driven by High-Pressure Torsion Open
Cu–14 wt% Sn alloy was annealed at temperatures of 320 and 500 °C. The concentration of tin cinit in the copper-based matrix increased with annealing temperature. The annealed samples were subjected to high-pressure torsion (HPT) at 6 GPa,…
View article: Omega Phase Formation in Ti–3wt.%Nb Alloy Induced by High-Pressure Torsion
Omega Phase Formation in Ti–3wt.%Nb Alloy Induced by High-Pressure Torsion Open
It is well known that severe plastic deformation not only leads to strong grain refinement and material strengthening but also can drive phase transformations. A study of the fundamentals of α → ω phase transformations induced by high-pres…
View article: Influence of β-Stabilizers on the α-Ti→ω-Ti Transformation in Ti-Based Alloys
Influence of β-Stabilizers on the α-Ti→ω-Ti Transformation in Ti-Based Alloys Open
The development of next generation Ti-based alloys demand completely new processes and approaches. In particular, the Ti-alloys of next generation will contain not only α-Ti and β-Ti phases, but also small amounts of ω-phase and intermetal…
View article: Application of combined load for obtaining ultra-fine grained structure in magnetic alloys of the Fe-Cr-Co system
Application of combined load for obtaining ultra-fine grained structure in magnetic alloys of the Fe-Cr-Co system Open
Fe-Cr-Co system magnets are known for their high remanence and maximum energy product along with high mechanical properties. However, since the thermomagnetic treatment of the alloy implies the spinodal decomposition, which in turn drops t…
View article: On Constituents of the Periodic Layered Microstructure Developed in the Solid-State Reaction Between Zinc and Co2Si
On Constituents of the Periodic Layered Microstructure Developed in the Solid-State Reaction Between Zinc and Co2Si Open
The composition and crystal structure of the constituents of the periodic layered microstructure developed during the solid-state reaction between Co 2 Si intermetallic and zinc at 390 °C were investigated using scanning electron microscop…
View article: DIFFUSIVE AND DISPLACIVE PHASE TRANSFORMATIONS UNDER HIGH PRESSURE TORSION
DIFFUSIVE AND DISPLACIVE PHASE TRANSFORMATIONS UNDER HIGH PRESSURE TORSION Open
Severe plastic deformation (SPD) can induce various phase transformations. After a certain strain, the dynamic equilibrium establishes between defects production by an external force and their relaxation (annihilation). The grain size, har…
View article: Microstructure Evolution and Some Properties of Hard Magnetic FeCr30Co8 Alloy Subjected to Torsion Combined with Tension
Microstructure Evolution and Some Properties of Hard Magnetic FeCr30Co8 Alloy Subjected to Torsion Combined with Tension Open
The hard magnetic alloy FeCr30Co8 alloy was subjected to severe plastic deformation (SPD) by torsion combined with tension in the temperature range of 750 °C to 850 °C. This range of deformation temperatures corresponds to the α solid solu…
View article: Diffusive and Displacive Phase Transformations in Nanocomposites under High Pressure Torsion
Diffusive and Displacive Phase Transformations in Nanocomposites under High Pressure Torsion Open
The high-pressure torsion (HPT) of Ti-Fe alloys with different iron content has been studied at 7 GPa, 5 anvil rotations and rotation speed of 1 rpm. The alloys have been annealed before HPT in such a way that they contained different amou…
View article: Dissolution of Ag Precipitates in the Cu–8wt.%Ag Alloy Deformed by High Pressure Torsion
Dissolution of Ag Precipitates in the Cu–8wt.%Ag Alloy Deformed by High Pressure Torsion Open
The aim of this work was to study the influence of severe plastic deformation (SPD) on the dissolution of silver particles in Cu–8wt.%Ag alloys. In order to obtain different morphologies of silver particles, samples were annealed at 400, 5…
View article: Structural and Mechanical Properties of Ti–Co Alloys Treated by High Pressure Torsion
Structural and Mechanical Properties of Ti–Co Alloys Treated by High Pressure Torsion Open
The microstructure and properties of titanium-based alloys can be tailored using severe plastic deformation. The structure and microhardness of Ti–4 wt.% Co alloy have been studied after preliminary annealing and following high pressure to…
View article: Grain Boundary Complexions and Phase Transformations in Al- and Cu-Based Alloys
Grain Boundary Complexions and Phase Transformations in Al- and Cu-Based Alloys Open
High-pressure torsion has been used to obtain the ultra-fine grained (UFG) state with a high specific area of grain boundaries (GBs) in Al-Zn, Al-Mg, Cu-Ag, Cu-Co, and Cu-Ni solid solutions with face-centered cubic (fcc) lattices. The UFG …
View article: Structure and mechanical properties of joint between hard magnetic alloy 25H15K and low carbon steel processed by pressure welding
Structure and mechanical properties of joint between hard magnetic alloy 25H15K and low carbon steel processed by pressure welding Open
The structure and tensile properties of diffusion bonding of hard magnetic alloy 25H15K with low carbon steel 3 processed by pressure welding in vacuum using interlayer of nickel. The microstructure of the compounds was investigated by sca…