The manufacturing route primarily determines the properties of materials prepared by additive methods. In this work, microstructural features and mechanical 316 L stainless steel selective laser method have been determined. Three types samples, (i) melted (SLM), (ii) hot isostatic pressed (HIP) (iii) heat treated (HT), were characterized. Microstructural analysis revealed that SLM samples formed melt pool boundaries with fine cellular–dendritic-type microstructure. This type microstructure...

Components prepared by additive technologies are increasingly utilized because of shape freedom and new possibilities fibre reinforcing. Therefore, it is important to investigate the mechanical properties numerical simulations theirs. This study focused on experimental examination flexural FDM long carbon reinforced composites with polymeric matrix Onyx 3-point bending test. Two volumetric contents two layer distributions were investigated. The experiments served also as case studies for...

Manganese-based alloys with the composition Mn2FeZ (Z = Si, Al) have been extensively investigated in recent years due to their potential applications spintronics. The Mn2FeSi alloy, prepared form of ingots, powders, or ribbons, exhibits either a cubic full-Heusler (L21) structure, an inverse-Heusler (XA) combination both. In contrast, Mn2FeAl alloy has so far synthesized only featuring primitive (β-Mn type) structure. This study focuses on new quaternary Mn2FeSi0.5Al0.5 from pure Mn, Fe,...

Fast neutron activation analysis (FNAA) offers a new way to determine the bulk composition of Heusler alloys. neutrons penetrate deep in alloys, allowing quantify elemental thanks characteristic gamma-rays emitted by excited elements. In this work, fast generator (MP320) and low-background high-efficiency well-type Ge gamma spectrometer are used amount Mn, Fe, Al, Si, Sn manufactured The alloy is compared with surface (micrometer depth range) obtained classical energy dispersive X-ray...

Ternary Mn2FeSi alloy was synthesized from pure elemental powders by mechanical alloying, using a high-energy planetary ball mill. The formation of an inverse-Heusler phase after 168 h milling and subsequent annealing at 1173 K for 1.5 confirmed X-ray diffraction. diffractogram analysis yielded XA structure the lattice parameter 0.5677 nm in good agreement with theoretically obtained value 0.560 nm. final powder formed particles irregular shape median diameter D50 3.8 μm their agglomerates....

Three TiAl-based alloys with nominal composition Ti-47Al-8Nb, Ti-47Al-8Ta and Ti-47Al--8Ta-0.3Y(at.%) were prepared by induction melting in graphite crucibles centrifugal casting into moulds.Chemical composition, microstructure mechanical properties of the as-cast are characterised.The crucible leads to an increase carbon content from 460 1020 wtppm formation fine carbide particles predominantly γ(TiAl) phase.Beside carbides, addition 0.3 at.% yttrium results Y2O3 YAl2 particles.The oxygen...

The wide application of Nd-Fe-B permanent magnets, in addition to rare-earth metal resource constraints, creates the necessity development efficient technologies for recycling sintered magnets. In present study, a magnet-to-magnet process is considered. As starting materials, magnets different grades were used, which processed by hydrogen decrepitation and blending powder with NdHx. Composition inhomogeneity Nd2Fe14B-based magnetic phase grains recycled existence core-shell structure...

The alloy with a composition Ti-45Al-5Nb-0.2B-0.75C(at.%) was prepared by induction melting and centrifugal casting.The fully lamellar microstructure of the without carbides produced heat treatment consisting hot isostatic pressing (HIP) solution annealing followed cooling to room temperature.The stability γ(TiAl) + α2(Ti3Al) studied at temperatures 750, 850 950 • C up an ageing time 3400 h.The analysis shows that most dominant change in α2 lamellae thinning, which more pronounced higher...

The possibilities of metallurgical preparation 40Nb-60Al and 15W-85Al intermetallic compounds (in at.%) by plasma arc melting (PAM) vacuum induction (VIM) were studied. Both methods allow easy Nb–Al alloys; however, significant evaporation Al was observed during the melting, which affected resulting chemical composition. W–Al alloys more problematic because there no complete re-melting W PAM VIM. However, combination VIM allowed alloy without any non-melted parts. microstructure consisted...

The present study investigated the effects of alloying and nano-reinforcement on mechanical properties (microhardness, tensile strength, compressive strength) Mg-based alloys composites. Pure Mg, Mg-3Sn alloy, + 0.2 GNP alloy-nanocomposite were synthesized by powder metallurgy followed hot extrusion. microstructural characteristics bulk extruded samples explored using X-ray diffraction, field-emission scanning electron microscopy, optical microscopy their compared. microhardness, strength...

In this work, the quaternary Mn2FeSi0.5Al0.5 alloys are prepared for first time in form of cylinder-shaped ingots by traditional induction melting technique followed homogenization annealing at 773 K 100 h. The microstructural and magnetic properties as-cast annealed samples analyzed detail compared to Mn2FeSi Mn2FeAl ternary alloys. two-phase both before after annealing, their diffractograms correspond primitive cubic β-Mn structure. Obtained lattice constant 0.6274 nm is only slightly...

This study is focused on the treatment of waste sludge from a zinc chloride production in order to prepare iron-rich pigments usable for glazes. In galvanizing plants, yellow containing significant amount ZnO, Cl, and Fe2O3, formed. raw cannot be used as pigment glaze. Therefore, three methods treating this material were proposed: (a) washing with H2O, (b) calcination at 180 °C by (c) 900 H2O. These helped reduce Zn Cl content up 97%. According X-ray fluorescence analysis percentage Fe2O3...

The focus of new technologies on the formation inhomogeneous distributions heavy rare-earth metals (REMs) in hard magnetic Nd–Fe–B materials is scientific importance to increase their functional properties, along with preserving existing sources REMs. This paper focused coercivity enhancement Nd2Fe14B-based magnets by optimizing microstructure, which includes processes grain boundary structuring via application a Dy3Co0.6Cu0.4Hx alloy added initial Nd–Fe–B-based powder mixtures course...

Intermetallic compounds based on Ti-Al- (Si) are attractive materials with good thermal stability and low density. However, the production of these is quite complicated. Partially modified conventional methods melting metallurgy most often used due to availability, possible high productivity, relatively costs. Therefore, some technologies for intermetallics Ti-Al currently available, but certain disadvantages, which caused by poor casting properties or extreme reactivity melt crucibles. Some...

The present study investigated the effects of alloying and nano-reinforcement on mechanical properties (microhardness, tensile strength, compressive strength) Mg-based alloys composites. Pure Mg, Mg-3Sn alloy, Mg-3Sn+0.2GNP alloy-nanocomposite were synthesized by powder metallurgy followed hot extrusion. microstructural characteristics bulk extruded samples explored using X-ray diffraction, field-emission scanning electron microscopy, optical microscopy their compared. microhardness,...