Effect of titanium on the primary radiation damage and swelling of vanadium-titanium alloys

In this paper, a molecular dynamic study of the atomic displacement cascade development in pure vanadium and V-Ti alloys with titanium concentrations of 4, 8, and 16% is carried out for energies of a primary knocked-out atom of 5, 10, and 20 keV. The interactions between atoms in the V-Ti system are specified in the framework of a method developed earlier for modeling systems with metallic and covalent types of chemical bon

Molecular dynamics simulation of primary radiation damage in vanadium and alloy V-4Ti

The interatomic interaction in V and alloy V-4Ti was described on the base of modern potentials of interatomic interactions which took into account the interaction of screened ions at small interatomic distances and allowed to simulate correctly radiation damage. The main characteristics of atomic displacement cascades in simulated crystallites were calculated: the number of defects at different stages of cascade development, the size of the radiation-damaged regions, and an analysis of the estimation of the number, types and sizes of the surviving radiation defects in crystallites. The results obtained are compared for vanadium and alloy V-4T

Features of the implementation of a programmable logic controller and the development of software to control it

В статье рассмотрены проблемы внедрения программируемых логических контроллеров и необходимость разработки программного обеспечения для эффективного управления их работой, а также вопросы проектирования человеко-машинного интерфейса при модернизации устаревших последовательных релейно-контактных электрических схем и их эффективное использование на промышленных предприятиях.The article is discussed the problems of implementing programmable logic controllers and the need to develop software for effective control of their operation, as well as the issues of designing a human-machine interface during the modernization of outdated serial relay-contact electrical circuits and their effective use in industrial enterprises

Influence of the Mo₁₀Ni₃C₃B phase on the hardness and fracture toughness of Mo-Ni-C-B cermet: experimental and theoretical study

We obtained the decreasing of hardness and comparable values of the fracture toughness of Mo₂NiB₂‑Ni cermets due to the formation of Mo₁₀Ni₃C3B phase. To understand the effect of the Mo₁₀Ni₃C₃B phase on the mechanical properties of the cermet, first-principles calculations were applied to investigate the elastic, electronic, and thermodynamic properties of this phas

Genome assembly using quantum and quantum-inspired annealing

Recent advances in DNA sequencing open prospects to make whole-genome analysis rapid and reliable, which is promising for various applications including personalized medicine. However, existing techniques for {\it de novo} genome assembly, which is used for the analysis of genomic rearrangements, chromosome phasing, and reconstructing genomes without a reference, require solving tasks of high computational complexity. Here we demonstrate a method for solving genome assembly tasks with the use of quantum and quantum-inspired optimization techniques. Within this method, we present experimental results on genome assembly using quantum annealers both for simulated data and the $\phi$X 174 bacteriophage. Our results pave a way for an increase in the efficiency of solving bioinformatics problems with the use of quantum computing and, in particular, quantum annealing. We expect that the new generation of quantum annealing devices would outperform existing techniques for {\it de novo} genome assembly. To the best of our knowledge, this is the first experimental study of de novo genome assembly problems both for real and synthetic data on quantum annealing devices and quantum-inspired techniques.Comment: 9 pages, 4 figure

Edge interfaces of the Ω plates in a peak-aged Al-Cu-Mg-Ag alloy

The coherent edge interface structures of the relatively thin {111}Al Ω plates have been analyzed in a peak-aged Al-Cu-Mg-Ag alloy by atomic-resolution scanning transmission electron microscopy (STEM). Analysis of STEM images showed that these edge interfaces can deviate from their orthogonal orientations to the broad plate surface

The unique hybrid precipitate in a peak-aged Al-Cu-Mg-Ag alloy

The prevalent hardening phase forming in an Al-Cu-Mg-Ag alloy after peak-aging at 150 and 190 °C has been investigated using transmission electron microscopy methods. The precipitate atomic structure was determined. It is a hybrid precipitate (HP) with plate morphology on {111} Al planes, consisting of or- thorhombic and hexagonal structural fragments. Density functional theory calculations suggest that the hybridization reduces structural incompatibility of the HP plates with the Al matrix at the broad interfacial boundaries. Incorporation of Cu, Mg and Ag in the bulk HP structure reduces its formation enthalp

Self-point defect trapping responsible for radiation swelling reduction in V-Ti alloys

The very low swelling of V-Ti alloys under neutron irradiation is a poorly understood phenomenon. To uncover the underlying mechanism of swelling reduction, we performed density functional theory and molecular dynamics simulations with a V-4% Ti random alloy with interatomic potentials. We find that titanium solutes efficiently trap vacancies and self-interstitial atom

Doppler broadening of the annihilation line study of organic-inorganic hybrid ureasil-based composites

© Springer Science+Business Media Dordrecht 2015. The organic-inorganic hybrid ureasil-based composites, containing polyether chains covalently linked to a silica framework through urea bridges, referred as ureasilicates or ureasils, and semiconducting As2S3clusters, are investigated using Doppler broadening of annihilation line technique. It is established that the Doppler S and W parameters show significant structural difference between the pure ureasil and the As2S3-ureasil composites, the effect is more essential as the loading fraction of As2S3increases. The new Doppler broadening results obtained in this work are found to be in consistent with the earlier reported results of positron annihilation lifetime measurements of the same materials