Origin of the anomaly in diffuse scattering from disordered Pt-V alloys

An explanation of the anomalous concentration dependence of diffuse scattering from the Pt-V alloy system (splitting of the (100) short-range order intensity peak with increasing Pt content) is proposed. The effect is attributed to the competition between the interaction and self-energy curvatures. A similar temperature behaviour is predicted.Comment: 5 pages, 5 EPS figures, RevTeX; minor editorial corrections, text as publishe

Theory of temperature dependence of the Fermi surface-induced splitting of the alloy diffuse-scattering intensity peak

The explanation is presented for the temperature dependence of the fourfold intensity peak splitting found recently in diffuse scattering from the disordered Cu3Au alloy. The wavevector and temperature dependence of the self-energy is identified as the origin of the observed behaviour. Two approaches for the calculation of the self-energy, the high-temperature expansion and the alpha-expansion, are proposed. Applied to the Cu3Au alloy, both methods predict the increase of the splitting with temperature, in agreement with the experimental results.Comment: 4 pages, 3 EPS figures, RevTeX, submitted to J. Phys. Condens. Matter (Letter to the Editor

Cluster probabilities in binary alloys from diffraction data

A method is proposed which permits us to calculate, – from diffuse scattering data –, the probabilities for various clusters of atoms to appear in substitutional disordered alloys. It leads to simple, Taylor-like expressions for these probabilities in terms of experimentally measured short-range order parameters. Explicit calculations are performed for two clusters, nearest-neighbour triangle and tetrahedron, on the face-centered cubic lattice. The results obtained agree well with those of other approaches. The applicability of the Kirkwood superposition approximation to alloys is discussed

The Study of the Conditions of Cooling on the Structure and Properties of Castings Steel H11

Рассмотрены результаты исследования температурных полей процесса кристаллизации отливок из легированной стали, полученных электрошлаковым кокильным литьем. Показаны микроструктуры образцов отливок, полученных при различных условиях охлаждения, и представлены их механические свойстваResults of researches of temperature fields of process of crystallization of the castings of the alloyed steel received by electroslag kokilny casting are considered. Microstructures of models of the castings received under various refrigerating conditions are shown and their mechanical properties are presente

A Study of the Influence of Operating Conditions on the Degradation of the Structure of Steel 14MoV63

Приведены результаты исследования микроструктуры и свойств образцов, выполненных из фрагментов труб паропроводов из стали 12Х1МФ. Рассмотрена деградация структуры стали в процессе эксплуатации и изменения механических свойствThe results of the study of the microstructure and properties of the manufactured pipe fragments of steel pipe lines 14MoV63 are given. The deterioration of the structure of the steel during operation and changes in mechanical properties are considere

The Study of the Conditions of Cooling on the Structure and Properties of Castings Steel H11

Рассмотрены результаты исследования температурных полей процесса кристаллизации отливок из легированной стали, полученных электрошлаковым кокильным литьем. Показаны микроструктуры образцов отливок, полученных при различных условиях охлаждения, и представлены их механические свойстваResults of researches of temperature fields of process of crystallization of the castings of the alloyed steel received by electroslag kokilny casting are considered. Microstructures of models of the castings received under various refrigerating conditions are shown and their mechanical properties are presente

Development of Technology and Production of Metal Powder from Molten Silver for 3d-Printing

Рассмотрена технология получения металлического порошка из расплава серебра, содержащего 99,9 % Ag, путем диспергирования расплава методом газового распыления с применением воды. Приведены результаты исследования опытных партий, показывающие взаимосвязь формы и размеров частиц порошка при разных углах разбиения струи расплава струей воды высокого давленияThe technology of producing metal powder from molten silver containing 99,9 % Ag, by dispersing the melt by gas atomization using water. The results of the study of experimental batches showing the relationship shapes and sizes of the powder particles at different angles partition melt jet stream of high pressure wate