Published in Russian Metallurgy (Metally)
AbstractThe state of the art in technical diagnostics and nondestructive testing of materials and large-sized products by dynamic thermography methods is described. Special attention is paid to nondestructive rapid methods, which are effective under production and field conditions with one-sided access to the object to be controlled and without cut...
Published in Russian Metallurgy (Metally)
AbstractThe inverse pole figures built at the consecutive stages of compressive tests by 1–6% in the longitudinal and transverse directions of pressed rods made of MA14 (Mg–Zn–Zr), VMD7-1 (Mg–Y–Nd–Zn–Zr), and Mg–5Li–3Al alloys are used to determine the influence of alloying on the deformation mechanisms and the anisotropy of the mechanical properti...
Published in Russian Metallurgy (Metally)
AbstractThe laws and mechanisms of structure and phase formation in the rails subjected to severe plastic deformation during long-term operation in a railway are revealed. A highly defective surface layer ≈200 μm thick with a grain–subgrain nanostructure is found to form in the rails as a result of long-term operation. The mechanisms of transformat...
Published in Russian Metallurgy (Metally)
AbstractThe mechanical properties of 15Kh2GMF steel are estimated, and the fracture stages and mechanisms in this steel are studied during static, cyclic, and impact loading in the temperature range from –100°C to 20°C. A direct method is used to measure the real damage of the steel and to determine its physical properties, namely, the velocity and...
Published in Russian Metallurgy (Metally)
AbstractThe range in which the α-phase texture in hot-rolled sheets made of VT18U, VT41, and VT25U titanium alloys changes is found. Yield strength contours are calculated using the integral α-phase texture parameters. The yield strength anisotropy is shown to decrease with increasing β-phase content to 25 vol %, but it continues to depend on the t...
Published in Russian Metallurgy (Metally)
AbstractThe influence of the carbon, zirconium, and vanadium content on the brittle fracture resistance characteristics of 14KhGNDTs weather-resistant steel is studied. The correlation between the ductile crack extension energy and the volume fraction of pearlite is considered. The replacement of 0.003% Zr in the normalized steel by 0.005–0.006% V ...
Published in Russian Metallurgy (Metally)
AbstractThe effect of gaseous sulfocarbonitriding on the wear resistance of porous Ni3Al-based gas-thermal coatings is studied. An empirical model is developed to describe the wear kinetics of the coatings, and it takes into account the character of changing the wear parameters in time.
Published in Russian Metallurgy (Metally)
AbstractThe relation between the parameters of the impact indentation of a rigid spherical indenter (its velocity before impact, mass, diameter), the strain rate, and the hardness of a metal is studied. Expressions for the normal and radial strain rates at the initial stage of indentation are obtained. The most rational characteristic of impact pro...
Published in Russian Metallurgy (Metally)
AbstractThe microstructure, mechanical properties, and heat resistance of the laminated composites fabricated by high-pressure diffusion welding of a packet comprising alternating foils of niobium alloy with 5, 10, and 15 at % vanadium and aluminum are studied. The alternation of viscoplastic Nb–V alloy layers and strengthening aluminide layers is ...
Published in Russian Metallurgy (Metally)
AbstractThe deformation and fracture of a 4D-reinforced carbon–carbon composite material are studied during tension, compression, and three-point bending. A deformation and fracture mechanism is proposed for such a material during its compression and tension. The minimum reinforcing bar length in a carbon matrix, which provides effective external l...
