Investigation of Microstructure and Fracture Mechanism of Al-5.0Mg Alloys Fabricated by Wire Arc Additive Manufacturing

Panchenko, Irina; Chen, Xizhang; Ivanov, Yurii; Konovalov, S. V.

doi:10.1007/s11665-021-05973-0

Cited by 13 publications

(5 citation statements)

References 28 publications

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“…Manufacturing aluminum components as well as modifying already existing ones is of upmost significance due to the major application of aluminum and its' alloys in all sorts of industrial fields. Recently, the possibility of manufacturing AlMg5Cr (Al5356) and AlSi5 (Al4043) components using wire arc additive manufacturing in the CMT mode has already been studied and the relation between the different technological conditions during the build-up process and the geometry and mechanical properties has been established [15][16][17][18][19][20]. The influence of different heat inputs on the geometrical and mechanical properties of CMT build specimens has also been observed [18].…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization of Wire Arc Additively Manufactured AlSi5 Structures

Kotlarski

Ormanova

Ossenbrink

et al. 2022

Metals

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For the purpose of this research, single track details were manufactured in the shape of thin walls with a length of 100 mm and a height of 80 mm. Two welding speeds were chosen for this experiment–13.3 mm/s and 20.0 mm/s corresponding to the following heat inputs: 120 J/mm and 80 J/mm. The gas metal arc welding (GMAW) method was used for the build-up of the specimens in the cold arc pulse mode. The structure of the specimens was studied using X-ray diffraction (XRD) analysis carried out with CuKα radiation with a wavelength of 1.5406 Ǻ, optical microscopy, scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDX). Furthermore, the Vickers hardness of the samples was determined using a ZwickRoell DuraScan 10/20 G5 unit at a force of 1 N. A preferred crystallographic orientation towards the (200) plane was observed in all cases, however a vastly textured structure was observed with inclusions of peaks in the (111), (220), and (311) crystallographic planes. The full width at half maximum (FWHM) of samples taken from different stages of build-up was calculated indicating an increase of the dislocation density at the more advanced stages of specimen growth. Despite that an increase of the hardness was observed towards the top of both specimens. This is attributed to the change in the structure of the αAl + Si formations from an irregular one at the bottom of the specimens, towards a fibrous one at the top. The results are discussed in regard to the optimization of the build-up process during wire arc additive manufacturing (WAAM).

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Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization of Wire Arc Additively Manufactured AlSi5 Structures

Kotlarski

Ormanova

Ossenbrink

et al. 2022

Metals

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“…In another research, the authors demonstrate the tensile properties and fracture mechanism with the analysis of microstructure and phase composition of Al-5.0 Mg alloys. The results achieved from experiments can enrich the information of studies about Al-5.0 Mg alloys produced by WAAM-CMT (Geng et al, 2021b).…”

Section: Introductionmentioning

confidence: 71%

Electrochemical Properties of Diluted Al-Mg Alloys With Columnar-To-Equiaxed Transition

et al. 2022

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The objective of the present research is to study the corrosion susceptibility of two Al-Mg diluted alloys (Al-0.5wt.%Mg and Al-2wt.%Mg) with different grains structures obtained by directional solidification (columnar, equiaxed and columnar-to-equiaxed transition, CET) in 0.5% NaCl solution, at room temperature. The corrosion resistance is analyzed by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques in both longitudinal and transversal sections of the samples. The columnar grain zone presents higher corrosion resistance than the equiaxed grain zone. In addition, the transversal section shows higher corrosion resistance than the longitudinal section of the samples. Then, the Al-0.5wt.% Mg alloy displays higher corrosion resistance than the Al-2wt.% Mg alloy. The values of the polarization resistance are used as a basic criterion for the evaluation of the corrosion resistance of both alloys. In this way, when the polarization resistance decreases with the increasing in the distance from the base, the grain size, secondary dendritic arm spacings and hardness increases. In addition, when the polarization resistance increases, the critical temperature gradient decreases.

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“…4), the values of HV decreased by 1.5, and σ RS -by 2.5 times. This is due to a change in the phase composition of the coating with an increase in the aluminum content [33,34]. X-ray phase analysis showed an increase in the amount of plastic ferrite in the coating structure with an increase in the aluminum content in it (Figure 9b).…”

Section: Resultsmentioning

confidence: 99%

Mechanical Properties of Arc Coatings Sprayed with Cored Wires with Different Charge Compositions

et al. 2022

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The mechanical properties (hardness, cohesion, and residual stresses) of arc coatings designed for operation under conditions of boundary friction and corrosive-abrasive wear are analyzed. The coatings were formed by arc spraying cored wires (CW) with different charge compositions (the content of carbon, aluminum, and boron in CW charge varied). It is shown that the hardness of the coatings increases with an increase in the carbon content in them up to 1 wt. %, and then decreased due to an increase in the content of residual austenite in their structure. The level of residual stresses of the first kind in such coatings increased by four times with an increase in the carbon content to 2 wt. %. The hardness of the coatings and the level of residual tensile stresses in them also increase with a decrease in the aluminum content in them. In this case, the cohesive strength of the coatings increased due to the implementation of aluminothermic reactions in the droplets of the CW melt during their flight and crystallization on the sprayed surfaces. However, then, with an increase in the aluminum content in the coatings of more than 2 wt. %, their cohesive strength decreased. The level of residual tensile stresses in coatings with a high content of retained austenite decreased after heat treatment (tempering) of the specimens. Sometimes, after tempering, these stresses even transformed into residual compressive stresses (in particular, under using CW C1.4Cr14Ni2). At the same time, the tempering of specimens with a predominance of ferrite in the coating structure increased the level of residual tensile stresses in them, which is due to the precipitation of finely dispersed carbides or borides. It has been shown that the addition of boron-containing components (ferrochromium-boron, chromium-boron) to the composition of the CW charge leads to a significant increase in the hardness of the coatings. Thus, an increase in the boron content in coatings from 0 to 4 wt. % leads to an increase in their hardness from 320 HV to 1060 HV. However, this is accompanied by an increase in tensile residual stresses in the coatings and a decrease in their cohesive strength.

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Investigation of Microstructure and Fracture Mechanism of Al-5.0Mg Alloys Fabricated by Wire Arc Additive Manufacturing

Cited by 13 publications

References 28 publications

Fabrication and Characterization of Wire Arc Additively Manufactured AlSi5 Structures

Fabrication and Characterization of Wire Arc Additively Manufactured AlSi5 Structures

Electrochemical Properties of Diluted Al-Mg Alloys With Columnar-To-Equiaxed Transition

Mechanical Properties of Arc Coatings Sprayed with Cored Wires with Different Charge Compositions

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