Abstract In this study, AlSi10Mg samples were manufactured by laser-powder bed fusion process to explore the fracture toughness dependence on both built orientation and aging treatment. The experiments performed as-built directly-aged (200 $$^{\circ }$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mrow/> <mml:mo>∘</mml:mo> </mml:msup> </mml:math> C/4 h) conditions, with latter revealed be a valuable treatment for improving toughness. A comprehensive investigation...

The use of aluminium alloys for Additive Manufacturing is high interest advanced geometries and lightweight applications. In Directed Energy Deposition, a powder stock processed with laser beam, which offers process flexibility. However, aging the feedstock during storage or after recycling remains fundamentally challenging because their sensitivity to oxidation porosity. order investigate these effects, AlSi10Mg batches were aged in different conditions by Deposition. results showed that...

Graphene was encapsulated within the crystal lattice of Cu via chemical route to molecularly doped metals affording an excellent electrical conductor dubbed herein “CuproGraf”. Metal bars in CuproGraf embedding less than 0.5 wt% graphene obtained by heating followed hot rolling have conductivity as high 7% made from pure copper. Considering ease preparation, and that substantial room for improvement exists adopting a different powder agglomeration route, method is promising towards...

This study investigates the impact of powder aging on degradation AlSi10Mg during processing in laser bed fusion. Powder as result handling, continuous storage and recycling is a fundamental concern for aluminum alloys it introduces oxygen to feedstock material. In this work, analysis properties, affected by exposure procedure, showed change chemical morphological characteristics powders virgin aged conditions. The content appeared have significant effect powders' surface appearance light...

Maraging steels are widely used in Additive Manufacturing due to their good processability and outstanding combination of strength toughness. 18Ni300 is one the most employed maraging steels. However, it contains cobalt, which has recently been strictly regulated its environmental health hazards, having classified as carcinogenic. Moreover, this steel Ti, showing a high affinity for oxygen, leading oxide fractions powder final parts. In current work an ultrahigh Co Ti free AM was processed...

Copper alloy powders undergo oxidation upon exposure to ambient air conditions, leading the formation of a metastable surface layer predominantly comprised cuprous oxide (Cu2 O), which subsequently transitions cupric (Cu O). Accurately quantifying thickness this layer, typically spanning few nanometers, presents inherent challenges. This research delves into examining composition and extent on CuAg3.4 powder, produced via gas atomization, utilizing Raman UV–Vis spectroscopy. The primary...

The fracture and tensile behaviors of the AlSi10Mg alloy processed by Direct Energy Deposition were investigated. Three-point bending toughness specimens tested at room temperature along different crack plane orientations loading directions. Before being machined tested, printed samples subjected to heat treatment 300°C for 2 h relieve residual stresses. Microstructural fractographic analyses performed investigate mechanisms propagation paths each orientation. Significant differences in...

The Laser Powder Bed Fusion (LPBF) manufacturing of dense Cu parts with near infrared conventional systems is still challenging due to the high reflectivity and thermal conductivity powder. In this paper, we investigate a novel approach improve LPBF processability through modification particle surface properties. Pure powders were coated thin layer high-conductivity Ag by electrodeposition. powder was also heat-treated at 500 °C 600 promote diffusion coating interface, producing different...

To address the challenges in processing medium-carbon hot work tool steels by laser-based additive manufacturing (AM), a recently developed steel with improved processability was processed both laser powder bed fusion (L-PBF) and laser-directed energy deposition (L-DED). Microstructure phases as-built (AB) quenched (Q) states were compared for routes. Hardness, Charpy V notch impact toughness, tempering- thermomechanical softening- resistance, after direct double tempering from AB condition...

The Powder Bed Fusion- Laser Beam (PBF-LB) of pure Cu pose significant challenges due to the high laser-reflectivity and thermal-conductivity this metal. Near-IR lasers are widely considered not suitable for processing Cu, unless power is employed, limiting accessibility Cu. In work, we investigate a disruptive approach improve processability by using low-power (200 W) near-IR PBF-LB/M system, which based on Ag-coating particles that were heat-treated at 500°C/600°C promote diffusion coating...

In recent years, Laser Powder Bed Fusion (L-PBF) has emerged as a promising alternative manufacturing technique for hypereutectic Aluminum-Silicon alloys. Aluminium alloys containing high silicon are of special importance in terms thermal management applications owing to their low density, conductivity and tailorable coefficient expansion (CTE). this work, an alloy design, backed by thermodynamic simulation determine the effect content on CTE, was carried out with aim reaching CTE value...

Over the past decade, refractory high-entropy alloys (RHEAs) have been intensively studied due to their excellent high-temperature performances. Significant effort has dedicated reducing density, aiming make them competitive with Ni-based superalloys. However, RHEAs are typically produced through casting methods, which, given high melting temperatures of constitutive elements, may lead inhomogeneous and coarse microstructures, thereby compromising mechanical properties. Given this context,...

The fracture and tensile behaviors of the AlSi10Mg alloy processed by Directed Energy Deposition were investigated. Three-point bending toughness specimens tested at room temperature along different crack plane orientations loading directions. Before being machined tested, printed samples subjected to heat treatment 300°C for 2 h relieve residual stresses. Microstructural fractographic analyses performed investigate mechanisms propagation paths each orientation. Vickers microhardness...

In this work, a mechanical characterization of AlSi10Mg alloy processed by Direct Energy Deposition with Laser Beam Metals (DED-LB/M) in atmospheric conditions was performed. SE(B) and ESE(T) specimens, for fracture fatigue tests were printed machined having the cracks three different crack plane orientations. Microstructural fractographic analyses performed FE-SEM LOM, it observed that response is strongly affected orientation porosity distribution. Moreover, specimens analyzed using EBSD...

This study investigates on the impact of build geometry and powder aging degradation AlSi10Mg during recycling in laser bed fusion. Powder as result handling, continuous storage is a fundamental concern for aluminum alloys it introduces oxygen to feedstock material. In this work, analysis properties, affected by procedures, showed change chemical morphological characteristics powders various conditions. It was established that had direct influence degree degradation, intensifying with...