Assessing the grain structure of highly X-ray absorbing metallic alloys

dc.contributor.authorBormann, Therese
dc.contributor.authorBeckmann, Felix
dc.contributor.authorSchinhammer, Michael
dc.contributor.authorDeyhle, Hans
dc.contributor.authorde Wild, Michael
dc.contributor.authorMüller, Bert
dc.date.accessioned2024-05-23T07:47:16Z
dc.date.available2024-05-23T07:47:16Z
dc.date.issued2014-07
dc.description.abstractSelective laser melting allows the fabrication of NiTi implants with pre-defined, complex shapes. The control of the process parameters regulates the arrangement of the granular microstructure of the NiTi alloy. We prepared specimens with elongated grains, which build a sound basis for diffraction contrast tomography experiments using synchrotron radiation and for electron backscatter diffraction measurements. Both approaches reveal the orientation and size of the individual grains within the specimen. Still, electron backscatter diffraction is confined to two-dimensional cross-sections while diffraction contrast tomography reveals these microstructural features in three dimensions. We demonstrate that the grains in the selective laser melted specimen, which are oriented along the building direction, do not exhibit a well-defined planar grain orientation but are twisted. These twisted grains give rise to diffraction spots observable for several degrees of specimen rotation simultaneously to the acquisition of tomography data.
dc.identifier.doi10.3139/146.111052
dc.identifier.issn2195-8556
dc.identifier.issn1862-5282
dc.identifier.urihttps://irf.fhnw.ch/handle/11654/45801
dc.issue7
dc.language.isoen
dc.publisherDe Gruyter
dc.relation.ispartofInternational Journal of Materials Research
dc.subjectHigh-energy microtomography
dc.subjectPolycrystalline Fe-alloy
dc.subjectSelective laser melting
dc.subjectShape memory alloy NiTi
dc.subjectX-ray diffraction contrast tomography
dc.subject.ddc600 - Technik, Medizin, angewandte Wissenschaften
dc.titleAssessing the grain structure of highly X-ray absorbing metallic alloys
dc.type01A - Beitrag in wissenschaftlicher Zeitschrift
dc.volume105
dspace.entity.typePublication
fhnw.InventedHereYes
fhnw.ReviewTypeAnonymous ex ante peer review of a complete publication
fhnw.affiliation.hochschuleHochschule für Life Sciences FHNWde_CH
fhnw.affiliation.institutInstitut für Medizintechnik und Medizininformatikde_CH
fhnw.openAccessCategoryClosed
fhnw.pagination692 - 701
fhnw.publicationStatePublished
relation.isAuthorOfPublication135938a9-969d-4ea3-9bb2-7ff1d77554cb
relation.isAuthorOfPublication.latestForDiscovery135938a9-969d-4ea3-9bb2-7ff1d77554cb
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