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2024 (English)In: Materials & design, ISSN 0264-1275, E-ISSN 1873-4197, Vol. 244, article id 113199Article in journal (Refereed) Published
Abstract [en]
Additive manufacturing makes the production of bulk metallic glasses possible in thicknesses exceeding the critical casting thickness. However, a crucial challenge is the build-up of thermally induced stress, often resulting in printed parts suffering from cracking. In this study, the process parameters are optimised for printing soft-magnetic metallic glass samples of an Fe-based alloy (Fe73.8P10.6Mo4.2B2.3Si2.3C6.7), using laser beam powder bed fusion. In addition, the structural and magnetic properties of as-received and heat-treated powder are investigated and compared to those of the printed samples. Kerr microscopy is used for imaging the magnetic domains on single track cross-sections produced on top of a polished printed sample. This reveals the shape of the melt pool of a single laser track, as well as the magnetic domains around it and in other regions of the printed sample. The shape and size of the magnetic domains reflect the residual stress in the sample through the effect of magneto-elastic coupling. This magnetic contrast could be used to get further insights into how to control the development of stress during the printing process.
Place, publisher, year, edition, pages
Elsevier, 2024
Keywords
Bulk metallic glass (BMG), Laser beam powder bed fusion (PBF-LB/M), Selective laser melting (SLM), Kerr microscopy, Thermal stress
National Category
Manufacturing, Surface and Joining Technology Metallurgy and Metallic Materials
Identifiers
urn:nbn:se:uu:diva-536964 (URN)10.1016/j.matdes.2024.113199 (DOI)001286381400001 ()
Funder
Swedish Research Council, 2019-00207Swedish Research Council, 2019-00191Swedish Foundation for Strategic Research, GMT14-0048Swedish Energy Agency, P48716-1Swedish Research Council, 2022-03069
Note
De två första författarna delar förstaförfattarskapet
2024-09-092024-09-092025-04-02Bibliographically approved