kth.sePublications
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
Role of Superficial Defects and Machining Depth in Tensile Properties of Electron Beam Melting (EBM) Made Inconel 718
KTH, School of Industrial Engineering and Management (ITM), Production Engineering, Manufacturing and Metrology Systems.ORCID iD: 0000-0002-2582-9910
KTH, School of Industrial Engineering and Management (ITM), Production Engineering, Manufacturing and Metrology Systems.ORCID iD: 0000-0002-5960-2159
Swerim AB, Isafjordsgatan 28A, S-16440 Kista, Sweden.
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Process.ORCID iD: 0000-0002-6339-4612
Show others and affiliations
2021 (English)In: Journal of materials engineering and performance (Print), ISSN 1059-9495, E-ISSN 1544-1024, Vol. 30, no 3, p. 2091-2101Article in journal (Refereed) Published
Abstract [en]

Since there is no report on the influence of machining depth on electron beam melting (EBM) parts, this paper investigated the role of superficial defects and machining depth in the performance of EBM made Inconel 718 (IN718) samples. Therefore, as-built EBM samples were analyzed against the shallow-machined (i.e., only removal of outer surfaces) and deep-machined (i.e., deep surface removal into the material) parts. It was shown that both as-built and shallow-machined samples had a drastically lower yield strength (970 ± 50 MPa), ultimate tensile stress (1200 ± 40 MPa), and ductility (28 ± 2%) compared to the deep-machined samples. This was since premature failure occurred due to various superficial defects. The superficial defects appeared in two levels, as (1) notches and pores on the surface and (2) irregular pores and cracks within the subsurface. Since the latter occurred down to 2 mm underneath the surface, shallow machining only exposed the subsurface defects to outer surfaces. Thus, the shallow-machined parts achieved only 68% and 8% of UTS and elongation of the deep-machined parts, respectively. This low performance occurred to be comparable to the as-built parts, which failed prematurely due to the high fraction surface voids and notches as well as the subsurface defects.

Place, publisher, year, edition, pages
Springer , 2021. Vol. 30, no 3, p. 2091-2101
Keywords [en]
additive manufacturing, electron beam melting, failure analysis, Inconel 718, near-net shaped manufacturing, Electron beams, Inconel-718, Outer surface, Premature failures, Subsurface defect, Superficial defects, Surface removal, Surface voids, Ultimate tensile stress
National Category
Other Materials Engineering
Identifiers
URN: urn:nbn:se:kth:diva-316177DOI: 10.1007/s11665-021-05487-9ISI: 000618947300002Scopus ID: 2-s2.0-85101161091OAI: oai:DiVA.org:kth-316177DiVA, id: diva2:1699264
Note

QC 20220927

Available from: 2022-09-27 Created: 2022-09-27 Last updated: 2024-01-17Bibliographically approved

Open Access in DiVA

fulltext(6151 kB)40 downloads
File information
File name FULLTEXT01.pdfFile size 6151 kBChecksum SHA-512
b45213d7021daca439851062698eba88145c808000b4b9713cdc40cc26c5680d9bb15be9df17fc994a8a66ff814c423ef7118cd1add839e4de5bc53b830b37b6
Type fulltextMimetype application/pdf

Other links

Publisher's full textScopus

Authority records

Zhao, XiaoyuRashid, AmirHulme-Smith, ChristopherDadbakhsh, Sasan

Search in DiVA

By author/editor
Zhao, XiaoyuRashid, AmirHulme-Smith, ChristopherDadbakhsh, Sasan
By organisation
Manufacturing and Metrology SystemsProcess
In the same journal
Journal of materials engineering and performance (Print)
Other Materials Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 40 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: 119 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