Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Influence of laser powder bed fusion scanning pattern on residual stress and microstructure of alloy 718
Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institute, CH-5232 Villigen (CHE).
Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institute, CH-5232 Villigen (CHE).
Materials Science Group, Photon Science Division, Paul Scherrer Institute, 5232 Villigen (CHE).
University West, Department of Engineering Science, Division of Subtractive and Additive Manufacturing. (PTW)ORCID iD: 0000-0002-7675-7152
Show others and affiliations
2022 (English)In: Materials & design, ISSN 0264-1275, E-ISSN 1873-4197, Vol. 221, article id 110983Article in journal (Refereed) Published
Abstract [en]

A comprehensive investigation is undertaken on the effect of laser scanning pattern on the microstructure of cylindrical samples made of Alloy 718 processed by Laser Powder Bed Fusion. It is observed that the common alternate direction scanning of the laser results in a more homogeneous microstructure than the less common concentric line scans where significant microstructural heterogeneities are seen between the edges and the center of the sample. The investigation focuses on the precipitation, crystallographic texture, grain size, grain morphology and residual stresses utilizing synchrotron X-ray diffraction, neutron diffraction and electron microscopy. The heterogeneous microstructure of the sample processed with the concentric laser pattern influences the chemical composition of the matrix, which alters the reference “strain free” interplanar spacing used for evaluating the residual strain. The investigation underlines the significance of the processing parameters on the homogeneity of the microstructure and the effect of the chemical variations on the determination of residual stresses in materials such as Alloy 718, where strong local chemical variations occur because of different types and extent of precipitation. © 2022

Place, publisher, year, edition, pages
2022. Vol. 221, article id 110983
Keywords [en]
Morphology; Neutron diffraction; Precipitation (chemical); Scanning; Selective laser melting; Superalloys; Textures; Alloy 718; Chemical variations; Cylindrical samples; Homogeneous microstructure; Laser pattern; Laser powders; Laser scanning; Line scan; Powder bed; Selective laser melting; Residual stresses
National Category
Manufacturing, Surface and Joining Technology
Research subject
Production Technology
Identifiers
URN: urn:nbn:se:hv:diva-19171DOI: 10.1016/j.matdes.2022.110983Scopus ID: 2-s2.0-85135381018OAI: oai:DiVA.org:hv-19171DiVA, id: diva2:1709323
Note

 financial support from the Strategic Focus Area Advanced Manufacturing (SFA-AM) initiative of the ETH Board

Available from: 2022-11-08 Created: 2022-11-08 Last updated: 2022-11-08

Open Access in DiVA

fulltext(4997 kB)131 downloads
File information
File name FULLTEXT01.pdfFile size 4997 kBChecksum SHA-512
986628fb03817a2da69a26be96496a305d96dd16f7f4e8383805ca598d24a009726b731f62f619e92db044ca5a30ee02a98451280586735c561323b0c54bb2f3
Type fulltextMimetype application/pdf

Other links

Publisher's full textScopus

Authority records

Pederson, Robert

Search in DiVA

By author/editor
Pederson, Robert
By organisation
Division of Subtractive and Additive Manufacturing
In the same journal
Materials & design
Manufacturing, Surface and Joining Technology

Search outside of DiVA

GoogleGoogle Scholar
Total: 131 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 77 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf