A5044236637- Magnesium Alloys: Properties and Applications
- Aluminum Alloys Composites Properties
- Microstructure and mechanical properties
- Aluminum Alloy Microstructure Properties
- Advanced materials and composites
- Particle Accelerators and Free-Electron Lasers
- Metal and Thin Film Mechanics
- Particle accelerators and beam dynamics
- Titanium Alloys Microstructure and Properties
- Topological Materials and Phenomena
- Physics of Superconductivity and Magnetism
- Superconducting Materials and Applications
- Rare-earth and actinide compounds
- Metal Alloys Wear and Properties
- Hydrogen Storage and Materials
- Advanced Welding Techniques Analysis
- Gyrotron and Vacuum Electronics Research
- Corrosion Behavior and Inhibition
- Powder Metallurgy Techniques and Materials
- Iron-based superconductors research
- Advanced Thermoelectric Materials and Devices
- Magnetic Properties of Alloys
- Microstructure and Mechanical Properties of Steels
- Advanced X-ray Imaging Techniques
- Boron and Carbon Nanomaterials Research
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
1998-2024
Hiroshima University
1999-2002
The effect of high-pressure torsion (HPT) on the microstructure, phase composition, mechanical characteristics, degradation rate, and bioactive properties Zn-1%Mg alloy is studied. An ultrafine-grained (UFG) structure with an average grain size α-Zn equal to 890 ± 26 nm grains subgrains Mg2Zn11 MgZn2 phases a 50-100 are formed after HPT. This UFG leads increase in ultimate tensile strength by ~3 times elongation 6.3 3.3% due formation basal texture. study corrosion resistance did not show...
Widespread use of Mg-Zn-Ca alloys in clinical orthopedic practice requires improvement their mechanical properties—in particular, ductility—and enhancement bioactivity for accelerated osteoreconstruction. The alloy was studied two structural states: after homogenization and equal-channel angular pressing. Immersion potentiodynamic polarization tests showed that the corrosion rate not increased by deformation. mass loss vivo also statistically insignificant. Furthermore, it found deformation...
The effect of such an additional promising alloying element as samarium on hot-extruded Mg–Y–Gd–Zr alloys is investigated. microstructure, kinetics aging during the decomposition a supersaturated Mg solid solution, and mechanical properties are studied. differences recrystallization processes that occur in with various contents (0, 1.7, 2.5%) demonstrated. After hot extrusion, Mg–Y–Gd–Sm–Zr additionally hardened due to solution. At same time, changes nature this hardening. faster, maximum...
Abstract In this study, equal‐channel angular pressing (ECAP) of austenitic 316L and Cr–Ni–Ti stainless steels was carried out. Effect ECAP at 400°C on the evolution microstructure, mechanical properties, biocompatibility these investigated. The samples with ultrafine grain structure obtained in process did not deteriorate comparison an steel coarse‐grained state. However, treatment enhances multipotent mesenchymal stromal/stem cell proliferation by 26% for 17% counterparts. At same time,...
A study of microstructure, phase composition, mechanical properties, corrosion processes, and biocompatibility in vitro the Zn–1%Mg Zn–1%Mg–0.1%Ca alloys an annealed state after rotary swaging (RS) is presented. Partially recrystallized microstructure formed studied RS at 200 °C. reduces mass fraction intermetallic phases comparison with states alloys. °C increases strength up to 248 ± 9 249 growth ductility 10.3 3% 14.2 0.9%, respectively. The structure does not lead a change resistance...
A study of the effect high-pressure torsion (HPT) on structure, phase composition, corrosion resistance, mechanical properties and bioactivity in vitro Zn-1%Mg-0.1%Ca alloy was performed. It shown that HPT leads to refinement microstructure with formation recrystallized α-Zn grains an average size 750 ± 30 nm, a mixture different phases 38 7 nm. In addition, precipitation Ca-enriched particles ~20 nm observed. X-ray analysis showed consists five (Zn, Mg2Zn11, MgZn2, CaZn11 CaZn13), whose...
A study of the effect rotary swaging (RS) on microstructure and properties pre-extruded pre-quenched Cu-0.5%Cr-0.08%Zr alloy was performed. RS leads to formation an ultrafine-grained (UFG) microstructure. UFG structure caused by increases ultimate tensile strength (UTS) up 443 ± 5 MPa 597 9 for alloys, respectively. Additionally, reduction in ductility occurs after RS. It should be noted that UTS is increased a alloy, while dropped. The growth associated with precipitation fine Cr particles,...
In this study, we grew Cu co-doped single crystals of a topological superconductor candidate Sr x Bi 2 Se 3 , and studied their structural transport properties. We reveal that the addition even as small an amount co-dopant 0.6 atomic %, completely suppresses superconductivity in . Critical temperature (∼2.7 K) is rather robust with respect to co-doping. show systematically increases electron density lattice parameters c. Our results demonstrate -based materials induced by significantly lower...
In this work, a Fe–Mn–Pd alloy was produced by methods of equal channel angular pressing (ECAP) in order to obtain an with high rate degradation for the development biodegradable devices. Special efforts were made obtaining ultrafine-grained structure alloys fully austenitic state at temperatures 300 °C and 450 °C. Further investigation its effect on corrosion mechanical properties carried out. The formation structural element sizes 100–250 nm after deformation confirmed X-ray diffraction...
An attempt to improve the functional characteristics of a degradable Fe-Mn-5Si shape memory alloy by means structure refinement equal-channel angular pressing (ECAP) was made. In course ECAP, an austenitic ultrafine-grained obtained. shear bands with thickness 301 ± 31 nm, twins 11 1 nm in size were formed. Due resulting structure, tensile strength doubled up 1419 MPa, and yield increased 1352 four times higher compared annealed state. Dynamic indentation tests revealed decrease Young’s...
The structure, phase composition, corrosion and mechanical properties, as well aspects of biocompatibility in vitro vivo, a Zn-1%Mg-0.1%Dy alloy after equal-channel angular pressing (ECAP) were studied. structure refinement ECAP leads to the formation elongated α-Zn grains with width ~10 µm Mg- Dy-containing phases. In addition, X-ray diffraction analysis demonstrated that resulted basal texture alloy. These changes microstructure lead an increase ultimate tensile strength up 262 ± 7 MPa...
The study shows that multiaxial deformation (MAD) treatment leads to grain refinement in magnesium alloy WE43. Compared the initial state, MAD-processed exhibited smoother biocorrosion dynamics a fetal bovine serum and complete cell growth medium. Examination by microCT demonstrated retardation of decline volume Hounsfield unit values. An attendant reduction rate accumulation biodegradation products immersion medium, less pronounced alkalization, inhibited sedimentation on surface were...
The potential medical Zn-1.7%Mg and Zn-1.7%Mg-0.2%Zr alloys strengthened using high-pressure torsion (HPT) were investigated in this work. HPT led to a significant refinement of the microstructure both with formation an ultrafine-grained structure (UFG). average grain size after was ~700–800 nm for alloys. UFG increase ultimate tensile strength up 401 ± 16 482 12 MPa alloys, respectively. Additionally, variation ductility 56.3 16.9% 4.4 0.6%, respectively, also observed, apparently due...
We have grown and characterized three samples of Co-doped MnSi studied their physical properties (magnetization magnetic susceptibility, heat capacity, electrical resistance). All show non-Fermi liquid properties. From literature data current results it follows that impurities (Co Fe) eliminate the first-order phase transition peaks spread fluctuation maxima in such a way low-temperature part effectively reaches zero temperature, where fluctuations inevitably become quantum. The behavior...