Nanostructures and microhardness in Al and Al-Mg alloys subjected to SPD

H. J. Roven, M. Liu, M. Murashkin, R. Z. Valiev, A. R. Kilmametov, T. Ungár, L. Balogh

Research output

10 Citations (Scopus)

Abstract

Nanostructures and microhardness of a commercial purity Al, three binary Al-Mg alloys and a commercial AA5182 alloy subjected to high pressure torsion (HPT) at room temperature were comparatively investigated using high-resolution transmission electron microscopy, X-ray diffraction (XRD) and high-resolution XRD line profile analysis. The hardness values of HPT samples are twice to three times larger than that of the undeformed counterparts. Grain sizes measured by XRD are in the range 10-200 nm with typical average values ranging from 46 to 120 nm. The hardness values and the dislocation densities increased, whereas, the average grain size decreased significantly with increasing Mg contents. Typical dislocation densities are in the range 1.7 × 1014 m-2- 2.3 x 1015 m-2. However, local densities in grain boundary and triple junction areas might be as high as 1017 m-2. The strengthening mechanisms contributing to high hardness may primarily be attributed to the cooperative interactions of high dislocation densities, grain boundaries and planar interfaces.

Original languageEnglish
Pages (from-to)179-185
Number of pages7
JournalMaterials Science Forum
Volume604-605
DOIs
Publication statusPublished - 17 Apr 2009
EventInternational Conference Recent Developments in the Processing and Applications of Structural Metals and Alloys - Ancona
Duration: 22 Jun 200825 Jun 2008

Fingerprint

Microhardness
microhardness
Nanostructures
Hardness
X ray diffraction
Torsional stress
hardness
Grain boundaries
torsion
grain boundaries
grain size
diffraction
High resolution transmission electron microscopy
Dislocations (crystals)
x rays
high resolution
purity
transmission electron microscopy
room temperature
profiles

Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Roven, H. J., Liu, M., Murashkin, M., Valiev, R. Z., Kilmametov, A. R., Ungár, T., & Balogh, L. (2009). Nanostructures and microhardness in Al and Al-Mg alloys subjected to SPD. Materials Science Forum, 604-605, 179-185. https://doi.org/10.4028/3-908453-09-7
Roven, H. J. ; Liu, M. ; Murashkin, M. ; Valiev, R. Z. ; Kilmametov, A. R. ; Ungár, T. ; Balogh, L. / Nanostructures and microhardness in Al and Al-Mg alloys subjected to SPD. In: Materials Science Forum. 2009 ; Vol. 604-605. pp. 179-185.
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Roven, HJ, Liu, M, Murashkin, M, Valiev, RZ, Kilmametov, AR, Ungár, T & Balogh, L 2009, 'Nanostructures and microhardness in Al and Al-Mg alloys subjected to SPD', Materials Science Forum, vol. 604-605, pp. 179-185. https://doi.org/10.4028/3-908453-09-7

Nanostructures and microhardness in Al and Al-Mg alloys subjected to SPD. / Roven, H. J.; Liu, M.; Murashkin, M.; Valiev, R. Z.; Kilmametov, A. R.; Ungár, T.; Balogh, L.

In: Materials Science Forum, Vol. 604-605, 17.04.2009, p. 179-185.

Research output

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AU - Liu, M.

AU - Murashkin, M.

AU - Valiev, R. Z.

AU - Kilmametov, A. R.

AU - Ungár, T.

AU - Balogh, L.

PY - 2009/4/17

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