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- Sjöström, William,1994-Mittuniversitetet,Institutionen för ingenjörsvetenskap, matematik och ämnesdidaktik (2023-),STRC (author)
Material Development for Electron Beam-based Powder Bed Fusion
- BookEnglish2024
Publisher, publication year, extent ...
- Sundsvall :Mid Sweden University,2024
- 109 s.
- electronicrdacarrier
Numbers
- LIBRIS-ID:oai:DiVA.org:miun-50762
- ISBN:9789189786547
- https://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-50762URI
Supplementary language notes
- Language:English
- Summary in:English
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- SwePubSwePub
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Series
- Mid Sweden University licentiate thesis,1652-8948 ;202
Notes
- Vid tidpunkten för framläggningen av avhandlingen var följande delarbeten opublicerade: delarbete 2 och delarbete 4 (inskickat).At the time of the defence the following papers were unpublished: paper 2 and paper 4 (submitted).
- Electron beam powder bed fusion (PBF-EB) is an additivemanufacturing (AM) method based on layer-by-layer melting of apowder bed. The technology is industrialized in certain applicationsbut still considered as immature and is not as widely used as laserbeam-based systems (PBF-LB). PBF-EB can offer several benefits overPBF-LB such as process cleanliness, thermal efficiency, fast beam speed,higher power and energy transfer, low residual stresses in built partsand a good signal environment for process monitoring. This can beadded on top of the general benefits of AM such as geometricalfreedom, manufacturing efficiency, easy design revisions, short leadtimes and so on. This suggests that PBF-EB holds potential as atechnology for the sustainable production of materials andcomponents. This thesis investigates how PBF-EB can be furtherdeveloped to create new and unique materials features. This isachieved by introducing innovative methods for material processingand by further developing the PBF-EB process itself. The thesisintroduces a charge-free heating method for PBF-EB and the resultssuggest an enhanced processability of difficult-to-process materialsand powders. A method for building multi-materials in PBF-EB isintroduced and demonstrated by the manufacturing of direct andlamellar transitions between different alloys. Methods for processmonitoring and powder bed resistivity evaluation are proposed andxiidemonstrated. It is concluded that the results presented in this thesisenabled new PBF-EB processing modes, increased the knowledge ofthe process, and introduced a new material group by demonstratingthat ceramics can be processed at high temperatures (~1600C).
Subject headings and genre
- TEKNIK OCH TEKNOLOGIER Maskinteknik hsv//swe
- ENGINEERING AND TECHNOLOGY Mechanical Engineering hsv//eng
- Additive manufacturing
- Electron beam
- Powder bed fusion
- EBM
- PBF-EB
- PBF-EB/M
- PBF-EB/C
- Process development
- Material development
- Ti-6Al-4V
- 316L
- V4E
- Al2O3
Added entries (persons, corporate bodies, meetings, titles ...)
- Rännar, Lars-Erik,Professor,1973-Mittuniversitetet,Institutionen för ingenjörsvetenskap, matematik och ämnesdidaktik (2023-)(Swepub:miun)larran (thesis advisor)
- Botero, CarlosMittuniversitetet,Institutionen för ingenjörsvetenskap, matematik och ämnesdidaktik (2023-)(Swepub:miun)carbot (thesis advisor)
- Moverare, Johan,ProfessorLinköpings Universitet (opponent)
- MittuniversitetetInstitutionen för ingenjörsvetenskap, matematik och ämnesdidaktik (2023-) (creator_code:org_t)
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