Design optimization of smartphone camera housing fabricated by laser powder bed fusion using thermal analysis

Yang, Kyung-Tae; Kim, Min-Kyeom; Kim, Tae‐Hwan; Kim, Jae-Hoon; Suhr, Jonghwan

doi:10.1007/s12206-022-0118-6

Cited by 6 publications

(8 citation statements)

References 25 publications

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“…After the LPBF process, as-built MMCs often do not meet the desired standards of quality, exhibiting high surface roughness, residual stress, and anisotropic properties [177,182]. Therefore, postprocessing, such as heat treatments and surface finishing, becomes indispensable to attain the requisite qualities for engineering applications [34,183].…”

Section: Postprocessingmentioning

confidence: 99%

Strategies and Outlook on Metal Matrix Composites Produced Using Laser Powder Bed Fusion: A Review

Kim,

Fang,

Kim

et al. 2023

Metals

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Particle-reinforced metal matrix composites (MMCs) produced using the laser powder bed fusion (LPBF) technique have gained considerable attention because of their distinct attributes and properties in comparison with conventional manufacturing methods. Nevertheless, significant challenges persist with LPBF-fabricated MMCs: more design parameters over commercially available alloys and several defects resulting from inappropriate process conditions. These challenges arise from the intricate interaction of material- and process-related phenomena, requiring a fundamental understanding of the LPBF process to elucidate the microstructural evolution and underlying mechanisms of strengthening. This paper provides a comprehensive overview of these intricate phenomena and mechanisms, aiming to mitigate the process-related defects and facilitate the design of MMCs with enhanced mechanical properties. The material processing approach was suggested, covering from material design and LPBF to postprocessing. Furthermore, the role of in situ heat treatment on the microstructure evolution of MMCs was clarified, and several novel, potential strengthening theories were discussed for the LPBF-fabricated MMCs. The suggested strategies to address the challenges and design high-performance MMCs will offer an opportunity to develop promising LPBF-fabricated MMCs, while overcoming the material limitations of LPBF.

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Section: Postprocessingmentioning

confidence: 99%

Strategies and Outlook on Metal Matrix Composites Produced Using Laser Powder Bed Fusion: A Review

Kim,

Fang,

Kim

et al. 2023

Metals

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“…Min-Kyeom Kim 1 , Taehwan Kim 1 ,Jonghwan No 1 and Jonghwan Suhr 1 Laser powder bed fusion (LPBF) is a manufacturing technique in which a laser selectively melts spread powders for building a component. The manufacturing process induces complex phenomena and an interaction between melt pools and the particles.…”

Section: Effect Of Melt Pool and Particle Dynamics On As-built Qualit...mentioning

confidence: 99%

“…Laser powder bed fusion (L-PBF)is the promising technique which is capable of building complex structures and prototypes with saving time and cost [1]. The L-PBF technique, however, requires a delicate design of the process in a multiple scale, because various defects can easily occur at the poor process conditions [2,3].…”

Section: Introductionmentioning

confidence: 99%

Effect of Melt Pool and Particle Dynamics on As-built Qualities in Laser Powder Bed Fusion Process

Kim¹,

Kim²,

No³

et al. 2022

Asian Society for Precision Engineering and Nanotechnology (ASPEN 2022)

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“…The zig-zag path inherent to the weaving process demands substantial computation to simulate the movement of a heat source. As a result, the traditional modeling approaches, which employ a general heat source, are not appropriate for the weaving process in plasma arc DED 27,28,29 . To reduce the modelling effort for the optimization of weaving process, a novel and pragmatic approach is essential rather than the trial-and-error method or the state-of-the-art numerical modeling 20,30,31 .…”

Section: Introductionmentioning

confidence: 99%

Semi-empirical modeling of weaving process for high-quality and property parts in plasma arc directed energy deposition

Suhr,

Kim,

Fang

et al. 2024

Preprint

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Plasma arc directed energy deposition (DED) technology faces challenges, such as low resolution, nonuniform layers, defects, and severe deformation, despite its advantage of rapid, large-scale manufacturing. Although a weaving process offers potential solutions to these issues, its optimization is challenging due to more processing parameters over a stringer process. To address this, we introduce a semi-empirical modeling approach for the weaving process using 316L austenitic stainless steel. This modeling enables the empirical determination of printable region and the numerical alleviation of residual stress and deformation, using multi-heat sources to significantly reduce computing time. Our findings show that a larger weaving process notably decreases bead aspect ratio, dilution, and thermal deformation, thereby reducing uneven beads and layers, compared to the stringer process. Additionally, it enhances heat dissipation and minimizes the heat-affected zone, leading to a remarkable 69.98% increase in elongation while maintaining tensile strength at 486 MPa. This innovative approach offers a practical solution for enhancing the weaving process, overcoming its prevalent challenges to produce high-quality parts with improved properties.

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Design optimization of smartphone camera housing fabricated by laser powder bed fusion using thermal analysis

Cited by 6 publications

References 25 publications

Strategies and Outlook on Metal Matrix Composites Produced Using Laser Powder Bed Fusion: A Review

Strategies and Outlook on Metal Matrix Composites Produced Using Laser Powder Bed Fusion: A Review

Effect of Melt Pool and Particle Dynamics on As-built Qualities in Laser Powder Bed Fusion Process

Semi-empirical modeling of weaving process for high-quality and property parts in plasma arc directed energy deposition

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