New Frontiers in Materials Design for Laser Additive Manufacturing

Rittinghaus, Silja‐Katharina; Jägle, Eric Aimé; Schmid, Manfred; Gökce, Bilal

doi:10.3390/ma15176172

Cited by 5 publications

(4 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This result is based on the assumption of a Maxwellian velocity distribution [61]. Then, the thermal conductance G g = ∆q g /(T 1 − T 2 between plates 1 and 2 due to the gas can be represented by Equation (10).…”

Section: Heat Transfer Through the Gas Gapmentioning

confidence: 99%

“…. The thermal conductance G g = ∆q g /(T 1 − T 2 ) between plates 1 and 2 can be obtained from Equation (10) by multiplying by the coefficient σ (2−σ) ; see Equation (12).…”

Section: Heat Transfer Through the Gas Gapmentioning

confidence: 99%

“…Actually, various nanostructures can be created by controlled crystallization in many applications, such as additive manufacturing [5,8,9]. Advances in laser and additive manufacturing can be achieved through the proper development and modification of commercial base powders to optimize heat transfer in the system [10]. Thus, a deep understanding of the influence of different contributions to the ITC at the solid-solid and liquid-solid interfaces during phase transitions in microparticles can be useful for optimizing various technological processes.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Mesoscopic Effects of Interfacial Thermal Conductance during Fast Pre-Melting and Melting of Metal Microparticles

Минаков

Schick

2023

Applied Sciences

View full text Add to dashboard Cite

Interfacial thermal conductance (ITC) affects heat transfer in many physical phenomena and is an important parameter for various technologies. The article considers the influence of various mesoscopic effects on the ITC, such as the heat transfer through the gas gap, near-field radiative heat transfer, and changes in the wetting behavior during melting. Various contributions to the ITC of the liquid-solid interfaces in the processes of fast pre-melting and melting of metal microparticles are studied. The effective distance between materials in contact is a key parameter for determining ITC. This distance changes significantly during phase transformations of materials. An unusual gradual change in ITC recently observed during pre-melting below the melting point of some metals is discussed. The pre-melting process does not occur on the surface but is a volumetric change in the microstructure of the materials. This change in the microstructure during the pre-melting determines the magnitude of the dispersion forces, the effective distance, and the near-field thermal conductance. The knowledge gained can be useful for understanding and optimizing various technological processes, such as laser additive manufacturing.

show abstract

Section: Heat Transfer Through the Gas Gapmentioning

confidence: 99%

“…. The thermal conductance G g = ∆q g /(T 1 − T 2 ) between plates 1 and 2 can be obtained from Equation (10) by multiplying by the coefficient σ (2−σ) ; see Equation (12).…”

Section: Heat Transfer Through the Gas Gapmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Mesoscopic Effects of Interfacial Thermal Conductance during Fast Pre-Melting and Melting of Metal Microparticles

Минаков

Schick

2023

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…However, the properties of the printed components are very sensitive to the LPBF process parameters selected and the execution of the printing process. Realizing the full potential of AM cannot be achieved unless optimized process parameters can be identified for various alloys used in laser-based additive manufacturing [6].…”

Section: Introductionmentioning

confidence: 99%

A Numerical Investigation of Dimensionless Numbers Characterizing Meltpool Morphology of the Laser Powder Bed Fusion Process

Bhagat

Rudraraju

2022

Materials

View full text Add to dashboard Cite

Microstructure evolution in metal additive manufacturing (AM) is a complex multi-physics and multi-scale problem. Understanding the impact of AM process conditions on the microstructure evolution and the resulting mechanical properties of the printed component remains an active area of research. At the meltpool scale, the thermo-fluidic governing equations have been extensively modeled in the literature to understand the meltpool conditions and the thermal gradients in its vicinity. In many phenomena governed by partial differential equations, dimensional analysis and identification of important dimensionless numbers can provide significant insights into the process dynamics. In this context, we present a novel strategy using dimensional analysis and the linear least-squares regression method to numerically investigate the thermo-fluidic governing equations of the Laser Powder Bed Fusion AM process. First, the governing equations are solved using the Finite Element Method, and the model predictions are validated by comparing with experimentally estimated cooling rates, and with numerical results from the literature. Then, through dimensional analysis, an important dimensionless quantity interpreted as a measure of heat absorbed by the powdered material and the meltpool, is identified. This dimensionless measure of absorbed heat, along with classical dimensionless quantities such as Péclet, Marangoni, and Stefan numbers, are employed to investigate advective transport in the meltpool for different alloys. Further, the framework is used to study variations in the thermal gradients and the solidification cooling rate. Important correlations linking meltpool morphology and microstructure-evolution-related variables with classical dimensionless numbers are the key contribution of this work.

show abstract

Additive manufacturing of oxide-dispersion strengthened alloys: Materials, synthesis and manufacturing

Wilms

Rittinghaus

Goßling

et al. 2023

Progress in Materials Science

View full text Add to dashboard Cite

New Frontiers in Materials Design for Laser Additive Manufacturing

Abstract: Laser-based additive manufacturing (LAM) in all its variations is now being established as a technique for manufacturing components from various material types and alloys [...]

Cited by 5 publications

References 21 publications

Mesoscopic Effects of Interfacial Thermal Conductance during Fast Pre-Melting and Melting of Metal Microparticles

Mesoscopic Effects of Interfacial Thermal Conductance during Fast Pre-Melting and Melting of Metal Microparticles

A Numerical Investigation of Dimensionless Numbers Characterizing Meltpool Morphology of the Laser Powder Bed Fusion Process

Additive manufacturing of oxide-dispersion strengthened alloys: Materials, synthesis and manufacturing

Contact Info

Product

Resources

About