The deposition of a thin (several tens microns) protective coating in atmospheric conditions is challenging task for surface engineering. structural features and tribological properties particle-reinforced metal matrix composite synthesized on middle-carbon steel by air pulse-plasma treatments were studied the present work. 24–31 µm thick “24 vol.% (TiC + WC)/Hardened matrix” was produced 10 plasma pulses generated an electro-thermal axial accelerator equipped with consumable cathode novel...

The work is dedicated to the comparative study of a Co-28Cr-6Mo alloy fabricated by two methods (forging and laser bed fusion (LPBF)), in terms micro-mechanical, corrosion, tribological properties. wrought had an ε-HCP (60.4 vol%)+ γ-FCC structure with grain size 43.9 ± 7.1 µm cast-based dendritic pattern. LPBF presented (72.8 featuring three main microstructural patterns: (1) melt pools columnar grains, (2) solidification cellular network, (3) dislocations walls strain-aged elemental...

Tensile/impact behaviour of lower bainite obtained in high-Si steel 55Si3Mn2CrMoVNb was studied using SEM, TEM, and XRD.Specimens were austenitized at 900 • C isothermally treated 250, 270, 300 with holding up to 600 min.The heat treatment results the formation cementite-free bainite/retained austenite structure, where retained found as blocky "islands" interlaths "films".The width bainitic ferrite laths decreases from 170-240 µm 45-80 temperature decreasing.This increasing UTS (to 1700 MPa)...

The purpose of the research was to obtain an arc welded joint a preliminary quenched high-carbon wear resistant steel without losing structure that is previously obtained by heat treatment. 120Mn3Si2 chosen for experiments due its good resistance mechanical wear. fast cooling welding joints in water carried out right after welding. major conclusion soft austenitic layer appears vicinity fusion line as result joint. microstructure affected zone with rapid consists several subzones. first one...

Structural rolled steels are the primary products of modern ferrous metallurgy. Consequently, enhancing mechanical properties steel using energy-saving processing routes without furnace heating for additional heat treatment is advisable. This study compared effect on structural different routes, like conventional hot rolling, normalizing thermo-mechanically controlled (TMCP), and TMCP with accelerating cooling (AC) to 550 °C or 460 °C. The material studied was a 20 mm-thick sheet S355N grade...

Additive manufacturing is increasingly used to produce metallic biomaterials, and post-processing gaining increasing attention for improving the properties of as-built components. This study investigates effect work hardening followed by recrystallisation annealing on tensile nanoindentation behaviour laser powder bed-fused (LPBF) 316L stainless steel, with aim optimising its mechanical properties. As-built thermally stabilised (at 900 °C) specimens were prestrained in a uniaxially manner at...

This study explores the frequency-dependent magnetic losses in grain-oriented non-segmented cores with layers shifted by a constant angle, creating circular distribution of easy axes across core, up to 500 Hz. innovative approach reduces aligning flux rolling direction each layer, enabling development energy-efficient for AC rotating machines. We decompose total into hysteresis and dynamic components as functions frequency, peak induction, shifting angle. The results reveal that this...

This study focuses on the cobalt-free medium-to-high-entropy alloys AlxCrFe2Ni2 and AlxTixCrFe2Ni2, investigating influence of Alx Tix (where x = 0.2, 0.3, 0.4, 0.5, 0.6) development microstructural mechanical properties in as-cast annealed states. Structural changes were examined using optical microscopy, scanning electron microscopy (SEM), X-ray diffraction (XRD) measurements, while evaluated through Vickers hardness testing compression testing. analysis confirmed that increasing Al...

The structural features and nanoindentation/tribological properties of 316 stainless steel fabricated by conventional rolling laser-based powder bed fusion (LPBF) were comparatively investigated regarding the effect surface-pulsed plasma treatment (PPT). PPT was performed using an electrothermal axial accelerator under a discharge voltage 4.5 kV pulse duration 1 ms. Optical microscopy, scanning electron X-ray diffraction, nanoindentation measurements tribological tests applied to...

Iron is the most widespread ferromagnetic used in soft magnetic composites. Ferromagnetic powders are usually pressed at relatively high pressure to required shape before heat treatment. The functional properties of materials and composites strongly depend on pressing parameters. In this paper, densification pure powder iron was investigated a wide range 2.5 GPa. Correlation microstructure, density, mechanical with studied detail. Compressibility analysis based Equation state for...

This paper is devoted to the evaluation of "three-body-abrasion" wear behaviour (wt.%) 5W-5Mo-5V-10Cr-2.5Ti-Fe (balance) multi-component (C + B)-added alloys in as-cast condition. The carbon (0.3 wt.%, 0.7 1.1 wt.%) and boron (1.5 2.5 3.5 contents were selected using a full factorial (32) design method. had near-eutectic (at 1.5 wt.% B) or hyper-eutectic 2.5-3.5 structure. structural micro-constituents (in different combinations): (a) (W, Mo, V)-rich borocarbide M2(B,C)5 as coarse primary...

Relevance. Crystalline and amorphous lithium tetraborate (Li2B4O7) has a wide range of practical applications due to its physical properties. The knowledge the mechanical characteristics surface layers these materials, which are studied by nanoindentation, is necessary for optimising technological processes obtaining “optically perfect” samples. Aim. A comparative study properties deformation mechanisms glassy crystalline Li2B4O7 samples in applied loads. Methodology. elastic-plastic were...

The present paper shows the impact of different laser scribing conditions on possible reduction magnetic losses in grain oriented electrical steel sheets. experimental Fe-3%Si was taken from industrial line after final box annealing. surface investigated subjected to fiber processing using both pulse and continuous regimes order generate residual thermal stresses inducing domains structure refinement. samples before individual were tested AC field with 50Hz frequency induction 1.5T. most...

In the present work, we have used unconventional short-term secondary recrystallization heat treatment employing extraordinary high heating rate to develop coarse-grained microstructure with enhanced intensity of rotating cube texture {100}<011> in semi-finish vacuum degassed non-oriented electrical steels. The soft magnetic properties were improved through increase grains size favourable crystallographic orientation. appropriate final textural state treated experimental steels was achieved...

This article aims to discusses machine learning modelling using a dataset provided by the LANL (Los Alamos National Laboratory) earthquake prediction competition hosted Kaggle. The data were obtained from laboratory stick-slip friction experiment that mimics real earthquakes. Digitized acoustic signals recorded against time failure of granular layer compressed between steel plates. In this work, was employed develop models could predict aim is highlight importance and potential applicability...