Study of AlSi7Mg0.6 Alloy by Selective Laser Melting:
Mechanical Properties, Microstructure, Heat Treatment

Mauduit, Arnold; Gransac, Hervé; Auguste, Pierre; Pillot, Sébastienź; Diószegi, Attila

doi:10.7494/jcme.2019.3.1.1

Cited by 11 publications

(36 citation statements)

References 12 publications

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“…As previously mentioned, the fineness of the single track structure explains the high micro hardness value measured in comparison to an aluminum alloy AlSi7Mg0.6 produced by casting [8,10]. The microstructure of the as-built aluminum alloy AlSi7Mg0.6 part produced by SLM is described in literature [4,8,19]. It is reminded that in the as-built state, the grains in the single track are directed at a right angle to the tangent of the track edge: the grains develop along paths that are orthogonal to the isotherms in accordance with the solidification laws.…”

Section: Microstructure and Mechanical Propertiesmentioning

confidence: 62%

Section: Microstructure and Mechanical Propertiesmentioning

confidence: 99%

“…The aluminum alloy AlSi7Mg0.6 powder used during this study was supplied by TLS Technik. This batch has already been used for a previous study and presented in an earlier publication [8]. The main purpose of this document [8] is to list the advantages and disadvantages of the various metallurgical states studied on the AlSi7Mg0.6 alloy manufactured by SLM.…”

Section: Powdermentioning

confidence: 99%

“…These are the transition phases towards the Mg2Si equilibrium phase that was detected in the single tracks in configurations n°1 and n°7, primarily at the grain boundary ( Figure 13). The microstructure is made up of fine dendrites of solid aluminum solution along with eutectic Al-Si (Figures 14) [4,8,19]. The fine structure noted is possibly due to an extremely rapid cooling speed [10].…”

Section: Microstructure and Mechanical Propertiesmentioning

confidence: 99%

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Influence of the Manufacturing Parameters in Selective Laser Melting on Properties of Aluminum Alloy AlSi7Mg0.6 (A357)

Mauduit¹,

Gransac²,

Pillot³

2021

ACSM

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Various selective laser melting (SLM) configurations (8 in all) were tested on aluminum alloy AlSi7Mg0.6 by making single tracks on parallelepipeds specimens. We used an energy balance as a means of connecting the machine parameters (power, speed, etc.) of the 8 configurations to the morphology (geometry) of the single tracks. On this basis, we correlated the width, depth and especially the section area of the melt pool (single track) to the linear energy density. We were also able to assess the absorption coefficient of the aluminum alloy AlSi7Mg0.6 as a function of the temperature. The study was then focused on the microstructure and the possible impacts on the material properties including on the mechanical characteristics and the anisotropy observed in literature based on the build direction. Evidence suggests that the Hall-Petch relation can be used to explain this anisotropy. The thermal analysis highlighted two laser operating modes: the keyhole mode and the conduction mode. These modes have also been described via the morphology of the single tracks. Finally, a comparison between Rosenthal’s theoretical model (in the case of the conduction mode) and actual conditions was proposed by the obtained geometry of the single tracks as well as the cooling speeds calculated and measured using the dendrite arm spacing (DAS). The maximum temperatures achieved were also assessed by Rosenthal’s theoretical model which made it possible to explain the evaporation of some chemical elements during the manufacturing of the aluminum alloy through SLM.

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Section: Microstructure and Mechanical Propertiesmentioning

confidence: 62%

Section: Microstructure and Mechanical Propertiesmentioning

confidence: 99%

Section: Powdermentioning

confidence: 99%

Section: Microstructure and Mechanical Propertiesmentioning

confidence: 99%

See 2 more Smart Citations

Influence of the Manufacturing Parameters in Selective Laser Melting on Properties of Aluminum Alloy AlSi7Mg0.6 (A357)

Mauduit¹,

Gransac²,

Pillot³

2021

ACSM

Self Cite

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“…LPBF minimized material waste, which also helps reduce production costs [2]. In the LPBF process, a computer-controlled laser selectively melts the powder bed, which is iterated layer by layer until the final product [3]. Owing to the advantages of LPBF, many studies have tried to analyze and report on commercial alloy powders, such as stainless steels (e.g., AISI316L [4]), titanium (e.g., Ti-6Al-4V [5]), aluminum (e.g., AlSi10Mg [6]), and nickel-based superalloys (e.g., Inconel [7]).…”

Section: Introductionmentioning

confidence: 99%

Manufacturing Aluminum/Multiwalled Carbon Nanotube Composites via Laser Powder Bed Fusion

et al. 2020

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This study provides a novel approach to fabricating Al/C composites using laser powder bed fusion (LPBF) for a wide range of structural applications utilizing Al-matrix composites in additive manufacturing. We investigated the effects of LPBF on the fabrication of aluminum/multiwalled carbon nanotube (Al/MWCNT) composites under 25 different conditions, using varying laser power levels and scan speeds. The microstructures and mechanical properties of the specimens, such as elastic modulus and nanohardness, were analyzed, and trends were identified. We observed favorable sintering behavior under laser conditions with low energy density, which verified the suitability of Al/MWCNT composites for a fabrication process using LPBF. The size and number of pores increased in specimens produced under high energy density conditions, suggesting that they are more influenced by laser power than scan speed. Similarly, the elastic modulus of a specimen was also more affected by laser power than scan speed. In contrast, scan speed had a greater influence on the final nanohardness. Depending on the laser power used, we observed a difference in the crystallographic orientation of the specimens by a laser power during LPBF. When energy density is high, texture development of all samples tended to be more pronounced.

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Role of Direct Aging and Solution Treatment on Hardness, Microstructure and Residual Stress of the A357 (AlSi7Mg0.6) Alloy Produced by Powder Bed Fusion

Tonelli

Liverani

Morri

et al. 2021

Metall Mater Trans B

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Applying additive manufacturing (AM) technologies to the fabrication of aluminum automotive components, with an optimized design, may result in improved vehicle light weighting. However, the post-process heat treatment of such alloys has to be customized for the particular AM microstructure. The present study is aimed at investigating the effect of different heat treatments on the microstructure, hardness and residual stress of the A357 (AlSi7Mg0.6) heat-treatable alloy produced by laser-based powder bed fusion (LPBF, also known as selective laser melting). There are two major issues to be addressed: (1) relieving the internal residual stress resulting from the process and (2) strengthening the alloy with a customized heat treatment. Therefore, stress-relief annealing treatment, direct aging of the as-built alloy and a redesigned T6 treatment (consisting of a shortened high-temperature solution treatment followed by artificial aging) were examined. Comparable hardness values were reached in the LPBF alloy with optimized direct aging and T6 treatments, but complete relief of the residual stress was obtained only with T6. Microstructural analyses also suggested that, because of the supersaturated solid solution, different phenomena were involved in direct aging and T6 treatment.

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Study of AlSi7Mg0.6 Alloy by Selective Laser Melting: Mechanical Properties, Microstructure, Heat Treatment

Cited by 11 publications

References 12 publications

Influence of the Manufacturing Parameters in Selective Laser Melting on Properties of Aluminum Alloy AlSi7Mg0.6 (A357)

Influence of the Manufacturing Parameters in Selective Laser Melting on Properties of Aluminum Alloy AlSi7Mg0.6 (A357)

Manufacturing Aluminum/Multiwalled Carbon Nanotube Composites via Laser Powder Bed Fusion

Role of Direct Aging and Solution Treatment on Hardness, Microstructure and Residual Stress of the A357 (AlSi7Mg0.6) Alloy Produced by Powder Bed Fusion

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