Fundamental analysis of the influence of powder characteristics in Selective Laser Melting of molybdenum based on a multi-physical simulation model

Leitz, Karl-Heinz; Grohs, Christian; Singer, Péter; Tabernig, B.; Plankensteiner, A.; Kestler, H.; Sigl, Lorenz S.

doi:10.1016/j.ijrmhm.2017.11.034

Cited by 52 publications

(21 citation statements)

References 14 publications

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“…The influence of the powder layer morphology on the formation of the molten track has been studied theoretically using multi-physical modeling by Leitz et al [53]. For the case of molybdenum it has been shown that the LPBF process is highly sensitive to the powder particle arrangement in the powder layer.…”

Section: Test Of Raking Behaviormentioning

confidence: 99%

Powders for powder bed fusion: a review

et al. 2019

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The quality of powder used in powder bed-based additive manufacturing plays a key role concerning process performance and end part properties. Even though this is a generally accepted fact, there is still a lack of a comprehensive understanding of the powder property-part property relationship. However, numerous investigations focusing on selected powder properties and their corresponding influence on process aspects or final part properties have been published in recent years. Still, generalized statements on powder requirements for a defined process performance are not available. This can be attributed to the fact that the community has not yet come to an agreement which characterization techniques are most suitable for powder characterization in the additive manufacturing context and in most cases only selected aspects have been investigated for special powder materials. The aim of this review is to assess these building blocks of knowledge and to provide an overview on the current state of the art.

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Section: Test Of Raking Behaviormentioning

confidence: 99%

Powders for powder bed fusion: a review

et al. 2019

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“…Qi et al 12 has investigated the effects of scanning speed and defocusing distance on the melting mode transition in selective laser melting of Al7050 powder and obtained a very well agreement with the experimental result. Leitz et al 13 has acquired a deeper insight into the influence of powder characteristics in SLM by numerical simulations. Moser et al 14 has developed a discrete element model (DEM) to simulate the effective thermal conductivity of powder beds for selective laser sintering (SLS) applications.…”

Section: Introductionmentioning

confidence: 99%

Influence of different Processing Parameter on distortion and Residual Stress of Inconel 718 Alloys Fabricated by Selective Laser Melting (SLM)

Huo

Hong

et al. 2020

Mat. Res.

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“…Therefore, the VOF method was chosen to develop the CFD model. Leitz et al generated molybdenum powder beds with a layer thickness of 20 and 40 µm for further investigating the effect of powder bed characteristics on the melt track morphology [43].…”

Section: Discussionmentioning

confidence: 99%

“…Previous study has shown that different powder sizes lead to variation of the melt track width [43]. Moreover, the powder size and powder density have a critical impact on the density of the printed part [57].…”

Section: Powder and Substratementioning

confidence: 99%

“…The model is able to mimic wetting, capillary forces, and the effect of the arbitrary powder bed. Moreover, Leitz et al used numerical models to investigate the impact of powder particle sizes on melt track morphology [43]. The study found that the size and the arrangement of powder have an important impact on the formation of the melt track.…”

Section: The Benefits and The Drawbacks Of Computational Modeling Of The Slm Processmentioning

confidence: 99%

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Computational modeling of selective laser melting process

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I would like to thank my previous supervisor, A/P Wong Chee How, for his guidance, support, and encouragement throughout four years of this research. He has been very patient with me, giving me guidance in my research work, and encouraging me whenever I felt lost. I would also like to thank my current supervisor, A/P Du Hejun, for supporting me during my thesis submission and all the related documental requirements for my graduation.I would also like to thank Dr. Tang Chao. His relentless support on research, theory, and technical issue, and his encouragement have given me the strength and determination to complete my research. Additionally, I like to thank the technical advisory committee members, A/P S. N.Piramanayagam and A/P Yeong Wai Yee, who have also given me many valuable comments. I also wish to thank our group members for their support, in particular to Dr. Gan Ming Xuan and Mr. Chua Kok Hong Gregory who have helped me in the fabrication of samples and given me valuable comments on my research.In addition, I would like to give thanks to Nanyang Technology University for awarding me the research scholarship so that I have the opportunity to pursue a Ph.D. degree in Singapore. I would like to thank all professors, staffs, and students in Singapore Centre for 3D Printing (SC3DP) for all the encouragement and support.As importantly, I would like to thank my family and friends, both in Singapore and Vietnam.

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Fundamental analysis of the influence of powder characteristics in Selective Laser Melting of molybdenum based on a multi-physical simulation model

Cited by 52 publications

References 14 publications

Powders for powder bed fusion: a review

Powders for powder bed fusion: a review

Influence of different Processing Parameter on distortion and Residual Stress of Inconel 718 Alloys Fabricated by Selective Laser Melting (SLM)

Computational modeling of selective laser melting process

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