Grain refinement in nanostructured Al-Mg alloys subjected to high pressure torsion

Manping Liu, Hans J. Roven, Xintao Liu, Maxim Murashkin, Ruslan Z. Valiev, T. Ungár, L. Balogh

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

Nanostructures of three binary Al-Mg alloys and a commercial AA5182 alloy subjected to high pressure torsion at room temperature were comparatively investigated using transmission electron microscopy, high-resolution transmission electron microscopy, and X-ray line profile analysis. Grain size distributions, dislocation densities, and densities of planar defects including stacking faults and microtwins were quantified. The average subgrain size decreased considerably from 120 to 55 nm as the Mg content increased from 0.5 to 4.1 wt%. The average dislocation density in the alloys first increased to a maximum and then decreased as the Mg content increased and the average subgrain size decreased. The role of Mg solute on these features and the refinement mechanisms associated with the typical nanostructures and faults were interpreted.

Original languageEnglish
Pages (from-to)4659-4664
Number of pages6
JournalJournal of Materials Science
Volume45
Issue number17
DOIs
Publication statusPublished - Sep 2010

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Grain refinement
Torsional stress
Nanostructures
Stacking faults
High resolution transmission electron microscopy
Dislocations (crystals)
Transmission electron microscopy
X rays
Defects
Temperature

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Grain refinement in nanostructured Al-Mg alloys subjected to high pressure torsion. / Liu, Manping; Roven, Hans J.; Liu, Xintao; Murashkin, Maxim; Valiev, Ruslan Z.; Ungár, T.; Balogh, L.

In: Journal of Materials Science, Vol. 45, No. 17, 09.2010, p. 4659-4664.

Research output: Contribution to journalArticle

Liu, Manping ; Roven, Hans J. ; Liu, Xintao ; Murashkin, Maxim ; Valiev, Ruslan Z. ; Ungár, T. ; Balogh, L. / Grain refinement in nanostructured Al-Mg alloys subjected to high pressure torsion. In: Journal of Materials Science. 2010 ; Vol. 45, No. 17. pp. 4659-4664.
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