High Bending Strength Hypereutectic Al-22Si-0.2Fe-0.1Cu-Re Alloy Fabricated by Selective Laser Melting

Yin, Chunyue; Lu, Zhehao; Wei, Xianshun; Yan, Biao; Yan, Pengfei

doi:10.3390/met11040528

Cited by 6 publications

(3 citation statements)

References 61 publications

(174 reference statements)

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“…Experimental results indicate that the average bending strength of this alloy is 766 ± 30 MPa, with an average fracture displacement of 0.84 ± 0.03 mm. These values are significantly higher than those of aluminum alloys prepared by conventional methods [38,39], and they also surpass the reported PBF-LB/M aluminum alloys [40] and the base alloy AlSi20 (644 ± 44 MPa) [41]. This suggests that the cellular heterostructure formed in the PBF-LB/M Al-Si-Cu-Ni alloy plays a positive role in enhancing its bending property.…”

Section: Bending Propertymentioning

confidence: 60%

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Solidification Mechanism of Microstructure of Al-Si-Cu-Ni Alloy Manufactured by Laser Powder Bed Fusion and Mechanical Properties Effect

Shi,

Yan,

Yan

2024

Metals

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Based on previous work, where Al-Si-Cu-Ni alloy was successfully manufactured by laser powder bed fusion (PBF-LB/M) technology, in this study, we further observe the microstructure of the alloy, analyze the formation mechanism of the microstructure during solidification, and discuss their implications for the mechanical properties. The results indicate that the microstructure comprises multi-level cellular heterogeneous structures, with an α-Al matrix in the interior of the cellular structure and Cu- and Ni-rich phases clustered at the boundaries, intertwined with the silicon network. During solidification, α-Al solidifies first and occupies the core of the cells, while Si phases and Cu- and Ni-rich phases deposit along the cellular boundaries under the influence of surface tension. During the solidification process of cellular boundaries, influenced by spinodal decomposition and lattice spacing, Si phases and Cu- and Ni-rich phases interconnect and distribute crosswise, collectively forming multi-level cellular structures. The refined cellular microstructure of the PBF-LB/M Al-Si-Cu-Ni alloy enhances the mechanical properties of the alloy. The alloy exhibits a bending strength of 766 ± 30 MPa, a tensile strength and yield strength of 437 ± 6 MPa and 344 ± 4 MPa, respectively, with a relatively low fracture elongation of approximately 1.51 ± 0.07%. Subsequent improvement can be achieved through appropriate heat treatment processes.

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Section: Bending Propertymentioning

confidence: 60%

“…MPa) [41]. This suggests that the cellular heterostructure formed in the PBF-LB/M Al-Si-Cu-Ni alloy plays a positive role in enhancing its bending property.…”

Section: Tensile Propertymentioning

confidence: 89%

Solidification Mechanism of Microstructure of Al-Si-Cu-Ni Alloy Manufactured by Laser Powder Bed Fusion and Mechanical Properties Effect

Shi,

Yan,

Yan

2024

Metals

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“…Centrifugal spray-forming technology uses the centrifugal force provided by a highspeed rotating centrifugal disc to granulate a film-like metal [1,2], and the granulated droplets are deposited on a moving substrate to form a metal blank with a refined microstructure and uniform chemical composition [3,4]. The microstructure and related mechanical properties of the deposited blank [5][6][7] are mainly determined by the size, temperature and speed of the atomized droplets, and the atomization process [8][9][10] is closely related to the flow behavior of the liquid film. Therefore, it is of great significance to study the flow behavior of liquid films for the preparation of high-performance blanks.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Analysis of Metal Liquid Film Flow Characteristics during Centrifugal Spray Forming

Li,

Wei,

Lei

et al. 2023

Metals

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Liquid films are an important part of liquid metal granulation in the process of centrifugal spray forming. The size of the granulated particles has an important influence on the density, grain size and microstructure uniformity of the deposited blanks. The particle size is closely related to the flow characteristics of liquid films. Therefore, enhancing our understanding of the flow characteristics of liquid films can provide guidance for forming blanks. In this study, force analysis of a liquid film on the surface of a high-speed rotating centrifugal disc used in centrifugal spray-forming technology was carried out using D’Alembert’s principle and Newton’s law of viscosity. Then, combined with the principle of mass conservation, a theoretical model of the smooth flow of the liquid metal film was established. The experimental values obtained by Leshev were compared with our values to verify the correctness and accuracy of the model. Through the model, the influencing factors of the liquid film flow were obtained, such as the centrifugal disc speed, centrifugal disc radius, inlet volume flow rate and kinematic viscosity. Taking A390 aluminum alloy as the research object, the influence of the process parameters on the thickness, velocity and trajectory of the liquid film was revealed theoretically, and the relationship between the process parameters and the trajectory length and liquid film thickness was clarified. Modeling and analysis can not only help us to understand the flow of a liquid film, but also help us to predict the relevant parameters, which is convenient for the accurate and rapid regulation of the process to obtain the desired flow parameters. Therefore, the research content of this paper is of great significance for the preparation of billets with a uniform microstructure and excellent mechanical properties.

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Effect of dendritic or globular (rosette-like) morphology and its parameters on hardness of Al–7.5 wt% Si castings

Borisov,

Neduzhyi,

Shenevidko

2024

Bull Mater Sci

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High Bending Strength Hypereutectic Al-22Si-0.2Fe-0.1Cu-Re Alloy Fabricated by Selective Laser Melting

Cited by 6 publications

References 61 publications

Solidification Mechanism of Microstructure of Al-Si-Cu-Ni Alloy Manufactured by Laser Powder Bed Fusion and Mechanical Properties Effect

Solidification Mechanism of Microstructure of Al-Si-Cu-Ni Alloy Manufactured by Laser Powder Bed Fusion and Mechanical Properties Effect

Modeling and Analysis of Metal Liquid Film Flow Characteristics during Centrifugal Spray Forming

Effect of dendritic or globular (rosette-like) morphology and its parameters on hardness of Al–7.5 wt% Si castings

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