liu.seSearch for publications in DiVA
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • 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
Effect of heat treatment on the microstructure characteristics and microhardness of a novel γ′ nickel-based superalloy by laser powder bed fusion
Linköping University, Department of Management and Engineering, Engineering Materials. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0001-7117-9480
Div of Materials and Manufacture, Dept of Industrial and Mateials Science, Chalmers, Gothenburg.
Linköping University, Department of Management and Engineering, Engineering Materials. Linköping University, Faculty of Science & Engineering.
Div of Materials and Manufacture, Dept of Industrial and Mateials Science, Chalmers, Gothenburg.
Show others and affiliations
2021 (English)In: Result in Materials, ISSN 2590-048X, Vol. 12, article id 100232Article in journal (Refereed) Published
Abstract [en]

The fabrication of gamma prime (γ′) strengthened nickel-based superalloys by additive manufacturing (AM) techniques is of huge interest from the industrial and research community owing to their excellent high-temperature properties. The effect of post-AM-processing heat treatment on the microstructural characteristics and microhardness response of a laser powder bed fused (LPBF) γ′ strengthened nickel-based superalloy, MAD542, is systematically investigated. Post-processing heat treatment shows the significant importance of tailoring the γ′ morphology. With insufficient solutioning duration time, coarse γ′ formed in the interdendritic region heterogeneously, due to the lack of chemical composition homogenization. The cooling rate from the super-solvus solutioning plays an important role in controlling the γ′ size and morphology. Spherical γ′ is formed during the air cooling while irregularly shaped γ′ formed during the furnace cooling. The following aging heat treatment further tunes the γ′ morphology and γ channel width. After two-step aging, cuboidal γ′ is developed in the air-cooled sample, while in contrast, bi-modally distributed γ′ is developed in the furnace cooled sample with fine spherical γ′ embedded in the wide γ channel between coarse irregular shaped secondary γ′. More than 90% of the grains recrystallized during solutioning treatment at the super-solvus temperature for 30 min. The rapid recrystallization kinetics are attributed to the formation of annealing twins which significantly reduced the stored energy. Microhardness responses from different heat-treated conditions were examined.

Place, publisher, year, edition, pages
Elsevier, 2021. Vol. 12, article id 100232
Keywords [en]
Nickel-based superalloy; LPBF, Heat treatment, Gamma prime, Recrystallization
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:liu:diva-181233DOI: 10.1016/j.rinma.2021.100232OAI: oai:DiVA.org:liu-181233DiVA, id: diva2:1613655
Available from: 2021-11-23 Created: 2021-11-23 Last updated: 2021-12-14Bibliographically approved

Open Access in DiVA

fulltext(14333 kB)306 downloads
File information
File name FULLTEXT01.pdfFile size 14333 kBChecksum SHA-512
04391266bf57e958049bb91ac9d0b11e69632ec7ba6c77f9eae6e29ac5979a0e1d4697a1cac545261996b6fbe4bfbd59e9e6230c7306e638b7a9490517b41904
Type fulltextMimetype application/pdf

Other links

Publisher's full text

Authority records

Peng, Ru LinMoverare, Johan

Search in DiVA

By author/editor
Xu, JinghaoPeng, Ru LinMoverare, Johan
By organisation
Engineering MaterialsFaculty of Science & Engineering
Materials Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 306 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: 69 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • 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