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Virtual Development of Process Parameters for Bulk Metallic Glass Formation in Laser-Based Powder Bed Fusion
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Solid Mechanics.ORCID iD: 0000-0003-4061-4632
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Solid Mechanics.ORCID iD: 0000-0002-0053-5537
Department of Physics, Materials Physics, Uppsala University, P.O. Box 530, 75121 Uppsala, Sweden.ORCID iD: 0000-0003-2764-0545
Division of Solid Mechanics, Lund University, P.O. Box 118, 22100 Lund, Sweden.ORCID iD: 0000-0001-9330-1061
2022 (English)In: Materials, E-ISSN 1996-1944, Vol. 15, no 2, article id 450Article in journal (Refereed) Published
Abstract [en]

The development of process parameters and scanning strategies for bulk metallic glass formation during additive manufacturing is time-consuming and costly. It typically involves trials with varying settings and destructive testing to evaluate the final phase structure of the experimental samples. In this study, we present an alternative method by modelling to predict the influence of the process parameters on the crystalline phase evolution during laser-based powder bed fusion (PBF-LB). The methodology is demonstrated by performing simulations, varying the following parameters: laser power, hatch spacing and hatch length. The results are compared in terms of crystalline volume fraction, crystal number density and mean crystal radius after scanning five consecutive layers. The result from the simulation shows an identical trend for the predicted crystalline phase fraction compared to the experimental estimates. It is shown that a low laser power, large hatch spacing and long hatch lengths are beneficial for glass formation during PBF-LB. The absolute values show an offset though, over-predicted by the numerical model. The method can indicate favourable parameter settings and be a complementary tool in the development of scanning strategies and processing parameters for additive manufacturing of bulk metallic glass.

Place, publisher, year, edition, pages
MDPI, 2022. Vol. 15, no 2, article id 450
Keywords [en]
Additive manufacturing, Classical nucleation and growth theory, Crystallisation in metallic glass, Metallic glass, Simulation of laser-based powder bed fusion
National Category
Manufacturing, Surface and Joining Technology
Research subject
Solid Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-88904DOI: 10.3390/ma15020450ISI: 000757986100001PubMedID: 35057168Scopus ID: 2-s2.0-85122234396OAI: oai:DiVA.org:ltu-88904DiVA, id: diva2:1631372
Funder
Swedish Foundation for Strategic Research, GMT14-0048
Note

Validerad;2022;Nivå 2;2022-01-24 (johcin)

Available from: 2022-01-24 Created: 2022-01-24 Last updated: 2024-07-04Bibliographically approved

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Lindwall, JohanLundbäck, Andreas

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