Laser additive manufacturing of strong and ductile Al-12Si alloy under static magnetic field

Wang, Ke; Wang, Jiang; Lei, Liming; Sui, Yu; Hu, Tao; Shuai, Sansan; Xu, Songzhe; Cao, Zuhan; Li, X.P.; Chen, Chaoyue; Ren, Zhongming

doi:10.1016/j.jmst.2023.04.021

Cited by 21 publications

(2 citation statements)

References 47 publications

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“…The strong mechanical interaction among dendrites occurs under the action of a high magnetic field when no sufficient rotation space exists, further transforming the fractured dendrites into particles. Consequently, as demonstrated in figure 9(d) [76], the epitaxial columnar grains growth was significantly interrupted by equiaxed grains formed in the center of the molten pool, which can fundamentally amend mechanical anisotropy by weakening microstructural anisotropy. Furthermore, the corresponding engineering stress-strain curve (figure 9(e) [76]) indicates that the strength and ductility of Al-12Si alloys fabricated under the assistance of static magnetic field have been improved synchronously, providing another feasible way to overcome the strength-ductility trade-off dilemma of standalone grain structure material by fabricating particular spatial heterogeneous grain structures.…”

Section: Electromagnetic Field Assisted Am Technologymentioning

confidence: 99%

Performance-control-orientated hybrid metal additive manufacturing technologies: state of the art, challenges, and future trends

Lv,

Liang,

et al. 2024

Int. J. Extrem. Manuf.

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Metal additive manufacturing (AM) technologies have made significant progress in the basic theoretical field since their invention in the 1970s. However, performance instability during continuous processing, such as thermal history, residual stress accumulation, and columnar grain epitaxial growth, consistently hinders their broad application in standardized industrial production. To overcome these challenges, performance-control-oriented hybrid AM (HAM) technologies have been introduced. These technologies, by leveraging external auxiliary processes, aim to regulate microstructural evolution and mechanical properties during metal AM. In this context, HAM technologies for molten pool regulation and solidified material deformation are identified as energy field-assisted AM (EFed AM, e.g., ultrasonic, electromagnetic, heat, etc.) technologies and interlayer plastic deformation-assisted AM (IPDed AM, e.g., laser shock peening, rolling, ultrasonic peening, friction stir process, etc.) technologies, respectively. A detailed and systematic review of performance-control-oriented HAM technologies is then provided. This review covers the influence of external energy fields on the melting, flow, and solidification behavior of materials, and the regulatory effects of interlayer plastic deformation on grain refinement, nucleation, and recrystallization. Furthermore, the role of performance-control-oriented HAM technologies in managing residual stress conversion, metallurgical defect closure, mechanical property improvement, and anisotropy regulation is thoroughly reviewed and discussed. The review concludes with an analysis of future development trends in EFed AM and IPDed AM technologies.

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Section: Electromagnetic Field Assisted Am Technologymentioning

confidence: 99%

Performance-control-orientated hybrid metal additive manufacturing technologies: state of the art, challenges, and future trends

Lv,

Liang,

et al. 2024

Int. J. Extrem. Manuf.

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show abstract

“…AM typically uses high-energy lasers or electron beams in a layer-by-layer manner, cyclically increasing and decreasing temperatures over a wide temperature range in a short period time, which is very different from traditional processing techniques. This approach leads to a complicated thermal history, directly affecting the final microstructure and macroscopic properties [4][5][6]. Therefore, understanding the aforementioned effects of AM special forming technology is necessary to ensure its effective, safe, and long-term use.…”

Section: Introductionmentioning

confidence: 99%

Improved Ability to Resist Corrosion of Selective-Laser-Melted Stainless Steel Based on Microstructure and Passivation Film Characteristics

Tao,

Cai,

Tong

et al. 2024

Coatings

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The local corrosion resistance of forging and selective laser melting (SLM) 304 steels was explored by intergranular corrosion analysis, double-loop electrochemical potentiodynamic reactivation, dynamic polarization experimentation, structural analysis, and passivation film characteristics analysis. The ability to resist sensitization of SLM 304 steel is greater than that of forging 304 steel at a temperature of 650 °C for 9 h. Moreover, the pit corrosion resistance of forging and SLM 304 steels is weakened by sensitization, while the pit corrosion resistance of SLM 304 steel is much greater than that of forging steel. Therefore, SLM technology can improve the ability to resist sensitization and pit corrosion of 304 steel. Analysis showed that the ability to resist corrosion of the passivation film of SLM 304 steel is greater than that of forging steel. In addition, corrosion pits are easier to generate at the interface of forging steel and SLM 304 steel. The grain boundary corrosion of SLM 304 steel intensified while the corrosion of the melt pool boundaries weakened after the sensitization treatment, resulting in a decrease in pit corrosion resistance. The coupling effect of these different structures and passivation films decides the pit and sensitization resistance of forging and SLM 304 steels. Clarifying the corrosion mechanism of forging and SLM steels is of great significance for scientific research and the widespread use of SLM technology.

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Microstructure, solidification defects and mechanical properties of high-modulus and high-strength SiC/AlSi10Mg composites fabricated by selective laser melting

Song,

Shu,

Zhang

et al. 2024

Ceramics International

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Laser additive manufacturing of strong and ductile Al-12Si alloy under static magnetic field

Cited by 21 publications

References 47 publications

Performance-control-orientated hybrid metal additive manufacturing technologies: state of the art, challenges, and future trends

Performance-control-orientated hybrid metal additive manufacturing technologies: state of the art, challenges, and future trends

Improved Ability to Resist Corrosion of Selective-Laser-Melted Stainless Steel Based on Microstructure and Passivation Film Characteristics

Microstructure, solidification defects and mechanical properties of high-modulus and high-strength SiC/AlSi10Mg composites fabricated by selective laser melting

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