Multi-material additive manufacturing of thermocouples by laser-based powder bed fusion

Singer, Christopher; Schmitt, Matthias; Schlick, Georg; Schilp, Johannes

doi:10.1016/j.procir.2022.09.007

Cited by 11 publications

(2 citation statements)

References 7 publications

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“…A single-track experiment was conducted using various laser powers and scan speeds to estimate the hatch space [ 70 ], as illustrated in Figure 1 a; the corresponding process parameters are detailed in Table 2 (group a). The hatch space

was determined through Equation (1):

where

represents the width of the melt pool and

stands for melt pool overlap rate between the scanning track.…”

Section: Methodsmentioning

confidence: 99%

Surface Roughness of Interior Fine Flow Channels in Selective Laser Melted Ti-6Al-4V Alloy Components

Islam,

Hao,

Javaid

et al. 2024

Micromachines

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A challenge remains in achieving adequate surface roughness of SLM fabricated interior channels, which is crucial for fuel delivery in the space industry. This study investigated the surface roughness of interior fine flow channels (1 mm diameter) embedded in SLM fabricated TC4 alloy space components. A machine learning approach identified layer thickness as a significant factor affecting interior channel surface roughness, with an importance score of 1.184, followed by scan speed and laser power with scores of 0.758 and 0.512, respectively. The roughness resulted from thin layer thickness of 20 µm, predominantly formed through powder adherence, while from thicker layer of 50 µm, the roughness was mainly due to the stair step effect. Slow scan speeds increased melt pools solidification time at roof overhangs, causing molten metal to sag under gravity. Higher laser power increased melt pools temperature and led to dross formation at roof overhangs. Smaller hatch spaces increased roughness due to overlapping of melt tracks, while larger hatch spaces reduced surface roughness but led to decreased part density. The surface roughness was recorded at 34 µm for roof areas and 26.15 µm for floor areas. These findings contribute to potential adoption of TC4 alloy components in the space industry.

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was determined through Equation (1):

where

represents the width of the melt pool and

stands for melt pool overlap rate between the scanning track.…”

Section: Methodsmentioning

confidence: 99%

Surface Roughness of Interior Fine Flow Channels in Selective Laser Melted Ti-6Al-4V Alloy Components

Islam,

Hao,

Javaid

et al. 2024

Micromachines

View full text Add to dashboard Cite

show abstract

“…Research in the field of PBF-LB/MM is currently focused mainly on material science, while there are very few publications on the manufacturing of functional products by the application of PBF-LB/MM. The manufacturing and analysis of an injection nozzle made of tool steel and the copper alloy CW106C [29] and the manufacturing and analysis of thermocouples [30] are to be mentioned in this context.…”

Section: Introductionmentioning

confidence: 99%

Multi-Material Laser Powder Bed Fusion Additive Manufacturing of Concentrated Wound Stator Teeth

Oel

Rossmann²,

Bode

et al. 2023

Preprint

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Microstructure and thermal properties of dissimilar M300-CuCr1Zr alloys by multi-material laser-based powder bed fusion

Li,

Sukhomlinov,

Que

2024

Int J Miner Metall Mater

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Multi-material laser-based powder bed fusion (PBF-LB) allows manufacturing of parts with 3-dimensional gradient and additional functionality in a single step. This research focuses on the combination of thermally-conductive CuCr1Zr with hard M300 tool steel. Two interface configurations of M300 on CuCr1Zr and CuCr1Zr on M300 were investigated. Ultra-fine grains form at the interface due to the low mutual solubility of Cu and steel. The material mixing zone size is dependent on the configurations and tunable in the range of 0.1–0.3 mm by introducing a separate set of parameters for the interface layers. Microcracks and pores mainly occur in the transition zone. Regardless of these defects, the thermal diffusivity of bimetallic parts with 50vol% of CuCr1Zr significantly increases by 70%–150% compared to pure M300. The thermal diffusivity of CuCr1Zr and the hardness of M300 steel can be enhanced simultaneously by applying the aging heat treatment.

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Multi-material additive manufacturing of thermocouples by laser-based powder bed fusion

Cited by 11 publications

References 7 publications

Surface Roughness of Interior Fine Flow Channels in Selective Laser Melted Ti-6Al-4V Alloy Components

Surface Roughness of Interior Fine Flow Channels in Selective Laser Melted Ti-6Al-4V Alloy Components

Multi-Material Laser Powder Bed Fusion Additive Manufacturing of Concentrated Wound Stator Teeth

Microstructure and thermal properties of dissimilar M300-CuCr1Zr alloys by multi-material laser-based powder bed fusion

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