Unraveling the low thermal conductivity of the LPBF fabricated pure Al, AlSi12, and AlSi10Mg alloys through substrate preheating

Ghasemi, Ali; Fereiduni, Eskandar; Balbaa, Mohamed; Elbestawi, M.A.; Habibi, Saeid

doi:10.1016/j.addma.2022.103148

Cited by 7 publications

(4 citation statements)

References 45 publications

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“…Studies have shown that the thermal conductivity of Al‐based alloys produced by PBF exhibits 30–40% less thermal conductivity than their wrought or cast counterparts. [ 44,45 ] The same studies reported that an enhancement of up to 80% in thermal conductivity can be achieved following a heat treatment post‐processing procedure such as annealing, solid solution treatment, and T6 heat treatment. These findings highlight the importance of considering the impact of the manufacturing process on the final product and identifying potential areas for improvement.…”

Section: Fabrication Of Tpms‐based Structuresmentioning

confidence: 99%

Triply Periodic Minimal Surface Structures: Design, Fabrication, 3D Printing Techniques, State‐of‐the‐Art Studies, and Prospective Thermal Applications for Efficient Energy Utilization

Gado,

Al‐Ketan,

Aziz

et al. 2024

Energy Tech

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This review highlights the latest developments of triply periodic minimal surface (TPMS) structures with the aim of the system's energy utilization. TPMS structures have gained widespread recognition due to their significant heat transfer (e.g., enhanced surface area) and diverse mechanical properties (e.g., structural stability), making them highly valuable in numerous thermal applications. A comprehensive survey of the design approaches, software tools, commercial materials, and 3D printing techniques of TPMS‐based structures is provided. Research gaps and future perspectives for the commercialization of TMPS structures are identified. Moreover, the potential applications of TPMS‐based structures for heat transfer augmentation and thermal management are discussed. TPMS‐based structures are promising topologies for heat exchangers on account of their intrinsically outstanding specific surface area. In this context, TPMS‐based structures have received considerable attention for various applications, including heat exchangers, latent heat storage, hydrogen storage, battery cooling/thermal management, and membrane distillation. Besides, distinct potential applications of TPMS‐based structures are proposed for heat transfer intensification and thermal management of photovoltaic/thermal collectors and fuel cells. Meanwhile, new proposals for using TPMS‐based structures for different sorption‐based applications, notably adsorption cooling/desalination systems, adsorption atmospheric water harvesting, thermochemical energy storage, and desiccant air conditioning, are nominated for forward‐looking perspectives.

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Section: Fabrication Of Tpms‐based Structuresmentioning

confidence: 99%

Triply Periodic Minimal Surface Structures: Design, Fabrication, 3D Printing Techniques, State‐of‐the‐Art Studies, and Prospective Thermal Applications for Efficient Energy Utilization

Gado,

Al‐Ketan,

Aziz

et al. 2024

Energy Tech

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“…Additionally, its high thermal conductivity makes it suitable for applications like heat exchangers, electronic enclosures, and electrical connectors. AlSi10Mg [37,38]: This is one of the most commonly used aluminum alloys in LPBF. AlSi10Mg is composed of aluminum, silicon, and magnesium, and it has good strength, ductility, and corrosion resistance.…”

Section: Aluminum Alloysmentioning

confidence: 99%

“…In LPBF, it exhibits excellent buildability and mechanical properties, making it suitable for applications such as heat exchangers, electronic enclosures, and lightweight structural components. AlSi12 [38]: This aluminum-silicon alloy has good castability and high wear resistance. In LPBF, it exhibits good processability and mechanical properties, making it suitable for applications requiring high wear resistance, such as pump components, hydraulic channels, and automotive engine parts.…”

Section: Aluminum Alloysmentioning

confidence: 99%

Laser Powder Bed Fusion: Exploring Recent Technological Breakthroughs and Alloy Utilization

Hedric

2024

Preprint

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Laser Powder Bed Fusion (LPBF), as a transformative technology in the field of additive manufacturing, offers unprecedented design flexibility and material efficiency. This review paper delves into the latest advancements in LPBF technology and the various alloys used in the process, including titanium alloys, aluminum alloys, nickel-based superalloys, steel alloys, copper alloys, and high-entropy alloys. For each alloy category, we discuss their specific applications, performance characteristics, and challenges faced in LPBF usage. The paper discusses important technological breakthroughs, including innovations in laser systems, scanning strategies, and in-situ monitoring technologies, which have enhanced the precision and reliability of LPBF.

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“…In fact, their printability is affected by several features such as high reflectivity, high thermal conductivity, and poor flowability of the powder [7]. Among traditional Al alloys, near-eutectic cast alloys such as AlSi10Mg [8][9][10][11][12][13], AlSi12 [14,15], and A357 [16][17][18] are the most studied and suitable for LPBF [2]. This is due to the high Si content, which improves both the processability and the printability of these alloys by enhancing the fluidity of the melted alloy, narrowing the solidification range [19], and increasing the fraction of absorbed energy [2].…”

Section: Introductionmentioning

confidence: 99%

Processability of A6061 Aluminum Alloy Using Laser Powder Bed Fusion by In Situ Synthesis of Grain Refiners

Rosito

Vanzetti

Padovano

et al. 2023

Metals

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Despite the increasing interest in laser powder bed fusion (LPBF), only a few cast aluminum alloys are available for this process. This study focuses on improving the LPBF processability of the A6061 alloy, which is challenging due to its wide solidification range, the dendritic columnar grain growth, and consequent solidification cracking. To address these issues, in situ-synthesized grain refiners can be used to induce equiaxial grain growth and prevent crack formation. A6061 RAM2 powder—a mixture of A6061, Ti, and B4C—was characterized and processed using a low-power LPBF machine to create an in situ particle-reinforced metal matrix composite. Parameter optimization was performed to evaluate the effect of their variation on the printability of the alloy. Microstructural characterization of the samples revealed that the complete reaction and the synthesis of the ceramic reinforcement did not occur. However, TiAl3 was synthesized during the process and promoted a partial grain refinement, leading to the formation of equiaxial grains and preventing the formation of solidification cracks. The tensile tests carried out on the optimized samples exhibit superior mechanical properties compared to those of A6061 processed through LPBF.

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Unraveling the low thermal conductivity of the LPBF fabricated pure Al, AlSi12, and AlSi10Mg alloys through substrate preheating

Cited by 7 publications

References 45 publications

Triply Periodic Minimal Surface Structures: Design, Fabrication, 3D Printing Techniques, State‐of‐the‐Art Studies, and Prospective Thermal Applications for Efficient Energy Utilization

Triply Periodic Minimal Surface Structures: Design, Fabrication, 3D Printing Techniques, State‐of‐the‐Art Studies, and Prospective Thermal Applications for Efficient Energy Utilization

Laser Powder Bed Fusion: Exploring Recent Technological Breakthroughs and Alloy Utilization

Processability of A6061 Aluminum Alloy Using Laser Powder Bed Fusion by In Situ Synthesis of Grain Refiners

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