Inhomogeneity of CoCrW powder products manufactured by SLM technology

Guzanová, Anna; Draganovská, Dagmar; Ižaríková, Gabriela; Brezinová, Janette; Rajťúková, Viktória; Živčák, Jozef; Hudák, Radovan; Janoško, Erik; Moro, Róbert

doi:10.1007/s12206-021-0910-8

Cited by 3 publications

(2 citation statements)

References 44 publications

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“…Apart from the several common alloys mentioned above, several studies on powder reusability of other alloy systems, including Co-Cr-based alloys [200,260,261], Cu alloys [262], and high entropy alloys [263], have also been conducted, which are described in turn in the following.…”

Section: Powder Reusability Of Other Alloy Systemsmentioning

confidence: 99%

“…L-PBF is suitable for fabricating medical or dental parts, due to their complex geometry, low volume, and strong individualization [265]. The reusability of Co-Cr alloy powders has been reported in several studies, including Co-Cr-Mo [200,266] and Co-Cr-W [260,261]. Overall, Co-Cr alloys are unsuitable for multiple cycles of reuse from two aspects.…”

Section: Powder Reusability Of Other Alloy Systemsmentioning

confidence: 99%

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Characterization, preparation, and reuse of metallic powders for laser powder bed fusion: a review

Sun,

Chen,

Liu

et al. 2023

Int. J. Extrem. Manuf.

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Laser powder bed fusion (L-PBF) has attracted significant attention since its inception, providing unprecedented advantages to fabricate metallic components with complex geometry. The quality and performance of as-printed alloys is an intricate function consisting of numerous factors linking the feedstock powders, manufacturing, and post-treatment. As the starting materials, powders play a critical role in influencing the printing consistency, total fabrication cost, and mechanical properties. In consideration of its importance for L-PBF, the present review aims to review the recent progress on metallic powders for L-PBF focusing on powder characterization, powder fabrication, and powder reuse. The methods of powder characterization and fabrication were presented in the beginning by analyzing the principles and corresponding advantages and limitations. Subsequently, the effect of powder reuse on the powder characteristics and mechanical performance of L-PBF parts is analyzed focusing on steels, nickel-based superalloys, Ti and Ti alloys, and Al alloys. The evolution trend of powders and as-printed parts varies for different alloy systems based on the existing studies, which makes the proposal of a unified reuse protocol infeasible. Finally, perspectives are presented to cater to the increasing applications of AM technologies for future investigations. The present state-of-the-art work can pave the way for the broad industrial applications of L-PBF by enhancing printing consistency and reducing the total cost from the perspective of powders.

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Section: Powder Reusability Of Other Alloy Systemsmentioning

confidence: 99%

Section: Powder Reusability Of Other Alloy Systemsmentioning

confidence: 99%

Characterization, preparation, and reuse of metallic powders for laser powder bed fusion: a review

Sun,

Chen,

Liu

et al. 2023

Int. J. Extrem. Manuf.

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show abstract

On 3D printing of dental crowns with direct metal laser sintering for canine

2022

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Experimental and numerical study on micro-milling of CoCrW alloy produced by selective laser melting and casting

Oymak,

Bahçe,

Gezer

2024

Proceedings of the Institution of Mechanical Engineers, Part B:

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CoCrW can be produced using Additive Manufacturing (AM), while casting methods are commonly used for applications such as dental prostheses. However, rapid heating and cooling during AM production can lead to internal defects, micro-cracks, and shrinkage. Micro-milling can help enhance the material’s structure and impart micro-scale properties. This study aimed to investigate the micro-milling properties of CoCrW products manufactured using AM and compare them with materials produced by casting. Numerical models and experimental studies were conducted to examine the differences. Results showed that CoCr alloys produced with AM exhibited 25%–30% lower burr formations, while CoCrW produced by casting had 2%–5% lower surface roughness. Micro-milling experiments demonstrated that a feed rate of 2.5 μm/tooth resulted in 35%–40% more burr formation and surface roughness compared to a feed rate of 5 µm/tooth in both SLM and casting methods, attributed to the cutting edge radius. The cutting temperature and top burr height were analyzed using finite element simulations and experimental methods. It was observed that the maximum temperature in CoCrW produced by casting was 6%–15% higher than that in the SLM method. The finite element analyses and experiments revealed a difference of 4%–7% in maximum temperatures and top burr height.

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Inhomogeneity of CoCrW powder products manufactured by SLM technology

Cited by 3 publications

References 44 publications

Characterization, preparation, and reuse of metallic powders for laser powder bed fusion: a review

Characterization, preparation, and reuse of metallic powders for laser powder bed fusion: a review

On 3D printing of dental crowns with direct metal laser sintering for canine

Experimental and numerical study on micro-milling of CoCrW alloy produced by selective laser melting and casting

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