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
Comparison of segregations formed in unmodified and Sr-modified Al-Si alloys studied by atom probe tomography and transmission electron microscopy
Linköping University, Department of Physics, Chemistry and Biology, Nanostructured Materials. Linköping University, The Institute of Technology. Saarland University, Saarbrücken, Germany.
Saarland University, Saarbrücken, Germany.
Linköping University, Department of Physics, Chemistry and Biology, Nanostructured Materials. Linköping University, The Institute of Technology.
Saarland University, Saarbrücken, Germany.
Show others and affiliations
2014 (English)In: Journal of Alloys and Compounds, ISSN 0925-8388, E-ISSN 1873-4669, Vol. 611, 410-421 p.Article in journal (Refereed) Published
Abstract [en]

The mechanical properties of Al-7 wt.% Si can be enhanced by structural modifications of its eutectic phase. Addition of low concentrations of certain elements, in this case 150 wt-ppm Sr, is enough to cause a transition from a coarse plate-like Si structure to a finer coralline one. To fully understand the operating mechanism of this modification, the composition of the eutectic Si phase in unmodified and Sr-modified alloys was analysed and compared by atom probe tomography and (scanning) transmission electron microscopy. The unmodified alloy showed nanometre sized Al-segregations decorating defects, while the Sr-modified sample presented three types of Al-Sr segregations: (1) rod-like segregations that promote smoothening of the Al-Si boundaries in the eutectic phase, (2) particle-like segregations comparable to the ones seen in the unmodified alloy, and (3) planar segregations favouring the formation of twin boundaries. Al and Sr solubilities in Si after solidification were determined to be 430 +/- 160 at-ppm and 40 +/- 10 at-ppm, respectively. Sr predominantly segregates to the Si phase confirming its importance in the modification of the eutectic growth.

Place, publisher, year, edition, pages
Elsevier, 2014. Vol. 611, 410-421 p.
Keyword [en]
Aluminium-silicon alloys; Strontium modification; Atom probe tomography; Transmission electron microscopy; Microstructure
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:liu:diva-109356DOI: 10.1016/j.jallcom.2014.05.121ISI: 000338932400064OAI: oai:DiVA.org:liu-109356DiVA: diva2:738080
Available from: 2014-08-15 Created: 2014-08-15 Last updated: 2017-12-05Bibliographically approved

Open Access in DiVA

fulltext(2380 kB)523 downloads
File information
File name FULLTEXT01.pdfFile size 2380 kBChecksum SHA-512
cff78db4cb9042cf79462d3390cf3c33a8cd089256d72a5ab5436a0ccf93e3b4a3425f7ce7f68b813c1258d7474fd6e02260d280eaf908ebd94712836fc3890f
Type fulltextMimetype application/pdf

Other links

Publisher's full text

Search in DiVA

By author/editor
Barrirero, JeniferGhafoor, NaureenOdén, Magnus
By organisation
Nanostructured MaterialsThe Institute of Technology
In the same journal
Journal of Alloys and Compounds
Physical Sciences

Search outside of DiVA

GoogleGoogle Scholar
Total: 523 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: 227 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