Additive manufactured versus cast AlSi10Mg alloy: Microstructure and micromechanics

Shakil, Shawkat Imam; Hadadzadeh, Amir; Amirkhiz, Babak Shalchi; Pirgazi, Hadi; Mohammadi, Mohsen; Haghshenas, M.

doi:10.1016/j.rinma.2021.100178

Cited by 56 publications

(30 citation statements)

References 58 publications

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“…In alloys with an elevated manganese concentration, primary (Fe, Mn)23(C, B)6 dendrites were formed (Figure 6c). The composition of the eutectic alloys was as follows: 66.6 at.% Fe, 7.7-25.0 at.% C, 1.7-11.0 at.% Mn, and 4.0-8.4 at.% B [4,12]. Eutectic carbide particles grew from these lamellas and ran parallel to each other.…”

Section: Study On the Isothermal Section Of The Fe2b-"fe2c"-"fe2mn" P...mentioning

confidence: 99%

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Phase Equilibrium and Microstructure Examinations of Eutectic Fe-C-Mn-B Alloys

Pashechko

Тіsov

2022

Materials

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In this study, we analyzed the quaternary Fe-C-Mn-B system to create new eutectic cast alloys for coating deposition and additive manufacturing. Experimental samples were fabricated via the wire arc manufacturing method with argon shielding using Kemppi Pro 5200 Evolution equipment. Annealing was performed in a vacuum electric furnace at 1273 K for 350 h. For phase analyses, Jeol Superprobe 733 equipment was used. Metallographic and differential thermal analyses were used to reveal the eutectic structure of the samples. Examinations of the quaternary Fe-C-Mn-B system demonstrated that several eutectic alloys existed in the system. Four isothermal pseudo-ternary sections of the Fe-C-Mn-B system were studied: “Fe3B”-Fe3C-“Fe3Mn”; Fe2B-“Fe2C”-“Fe2Mn”; “Fe3B”-Fe3C-“Fe1.2Mn”; “Fe23B6”-“Fe23C6”-“Fe23Mn”. Broad eutectic concentrations enabled us to overcome parameter fluctuations during additive manufacturing. In each isothermal section, two dissimilar phase regions were determined: one with a ternary Fe-C-B composition and the other with a ternary Fe-C-Mn composition. Depending on the manganese content, two types of solid solutions could be formed: (Fe, Mn)α or (Fe, Mn)γ.

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Section: Study On the Isothermal Section Of The Fe2b-"fe2c"-"fe2mn" P...mentioning

confidence: 99%

“…Nanoparticles also contribute to alloy strengthening. However, post-heat treatment breaks and coarsens this microstructure [3,4]. For precipitation-strengthening alloys, the as-cast and additively manufactured microstructures are very close.…”

Section: Introductionmentioning

confidence: 99%

Phase Equilibrium and Microstructure Examinations of Eutectic Fe-C-Mn-B Alloys

Pashechko

Тіsov

2022

Materials

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“…Previous research [3] shows that the average yield strength is 10% higher and that the ultimate tensile strength is about 20% higher for the LPBF-made AlSi10Mg than that of cast AlSi10Mg, while the fatigue property of LPBF-made AlSi10Mg is significantly worse than the castings [4]. The fatigue property of LPBF-formed parts is affected by different kinds of defects, such as pores, cracks, inclusions, non-melting, and spheroidization [5]. The formation of defects can be influenced by various processing factors, listed as laser power, scanning rate, scanning spacing, powder layer thickness, protective atmosphere, post-heat treatment, etc.…”

Section: Introductionmentioning

confidence: 96%

A Comparative Study of Fatigue Energy Dissipation of Additive Manufactured and Cast AlSi10Mg Alloy

Yang

Zhu

Liu

et al. 2021

Metals

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In this paper, the fatigue energy dissipation of Gravity Casting (GC) and Laser-based Powder Bed Fusion (LPBF) AlSi10Mg alloys under cyclic loading are investigated. The increase in surface temperature related to the energy dissipation effect is decoupled and used to predict the fatigue limits of GC and LPBF AlSi10Mg alloys as being 55.8% UTS and 33.9% UTS, respectively. The energy dissipation rate is obtained by solving the one-dimensional thermal diffusion problem. This energy dissipation is separated into related and unrelated fatigue damage using polynomial function fitting. The energy dissipation related to fatigue damage for LPBF specimens is observed to be higher than that of GC specimens, which indicates worse fatigue performance. The fatigue damage entropy is employed to predict the fatigue life of both GC and LPBF AlSi10Mg alloys, which has a good agreement with the results of a traditional fatigue experiment.

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“…The good combination of strength, heat conductivity, and low weight make the AlSi10Mg aluminum alloy an optimal choice for several applications in automotive, aerospace and automation [ 1 , 2 ]. Its applications include housings, ductwork, engine parts, production tools and molds [ 3 , 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Heat Treatment on Microstructure and Selective Corrosion of LPBF-AlSi10Mg by Means of SKPFM and Exo-Electron Emission

et al. 2021

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The paper deals with the evolution of the microstructure of AlSi10Mg alloy obtained by laser powder bed fusion (LPBF), as a function of the post-processing heat treatment temperature. This was approached by complementary methods including FE-scanning electron microscopy, scanning Kelvin probe force microscopy and exo-electron emission techniques. The fast cooling rate of the LPBF process as compared to traditional casting produces a very fine microstructure with high mechanical properties and corrosion resistance. However, the LPBF-AlSi10Mg alloy can be susceptible to selective corrosion at the edge of the melt pools generated by the laser scan tracks. Post-process thermal treatments of the Al alloy induce a marked modification of the silicon network at melt pool edges, in particular at high temperature such as 400 °C. It was found that this is associated to a more homogeneous distribution of Volta potential. Analysis of exo-electron emission confirms the silicon diffusion during thermal treatment. The modification of the silicon network structure of the LPBF-AlSi10Mg during thermal treatment reduces the susceptibility to selective corrosion.

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Additive manufactured versus cast AlSi10Mg alloy: Microstructure and micromechanics

Cited by 56 publications

References 58 publications

Phase Equilibrium and Microstructure Examinations of Eutectic Fe-C-Mn-B Alloys

Phase Equilibrium and Microstructure Examinations of Eutectic Fe-C-Mn-B Alloys

A Comparative Study of Fatigue Energy Dissipation of Additive Manufactured and Cast AlSi10Mg Alloy

Effect of Heat Treatment on Microstructure and Selective Corrosion of LPBF-AlSi10Mg by Means of SKPFM and Exo-Electron Emission

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