Abstract
An aluminium-2024 alloy was prepared in the annealed and the solution treated conditions. Specimens in both conditions were processed by high-pressure torsion (HPT) at temperatures of either 293 or 673 K giving grain sizes for both conditions of ∼0.15 and ∼0.30 μm for these two processing temperatures, respectively. Tensile testing was conducted at 673 K and superplastic elongations were achieved in both the annealed and the solution treated samples, with a maximum elongation of 570% for an annealed specimen processed by HPT at 293 K. To check on the significance of microstructural inhomogeneities across the HPT disks, samples were machined either from the center of the disks or from an off-center position. The experimental results show that higher elongations are achieved at the off-center position. The similarity between the annealed and the solution treated conditions after HPT is attributed to a dissolution of precipitates during HPT processing.
| Original language | English |
|---|---|
| Pages (from-to) | 141-146 |
| Number of pages | 6 |
| Journal | Materials Science and Engineering A |
| Volume | 408 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - Nov 5 2005 |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
Cite this
Grain refinement and superplastic flow in an aluminum alloy processed by high-pressure torsion. / Dobatkin, Sergey V.; Bastarache, Elena N.; Sakai, Genki; Fujita, Takeshi; Horita, Zenji; Langdon, Terence G.
In: Materials Science and Engineering A, Vol. 408, No. 1-2, 05.11.2005, p. 141-146.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Grain refinement and superplastic flow in an aluminum alloy processed by high-pressure torsion
AU - Dobatkin, Sergey V.
AU - Bastarache, Elena N.
AU - Sakai, Genki
AU - Fujita, Takeshi
AU - Horita, Zenji
AU - Langdon, Terence G.
PY - 2005/11/5
Y1 - 2005/11/5
N2 - An aluminium-2024 alloy was prepared in the annealed and the solution treated conditions. Specimens in both conditions were processed by high-pressure torsion (HPT) at temperatures of either 293 or 673 K giving grain sizes for both conditions of ∼0.15 and ∼0.30 μm for these two processing temperatures, respectively. Tensile testing was conducted at 673 K and superplastic elongations were achieved in both the annealed and the solution treated samples, with a maximum elongation of 570% for an annealed specimen processed by HPT at 293 K. To check on the significance of microstructural inhomogeneities across the HPT disks, samples were machined either from the center of the disks or from an off-center position. The experimental results show that higher elongations are achieved at the off-center position. The similarity between the annealed and the solution treated conditions after HPT is attributed to a dissolution of precipitates during HPT processing.
AB - An aluminium-2024 alloy was prepared in the annealed and the solution treated conditions. Specimens in both conditions were processed by high-pressure torsion (HPT) at temperatures of either 293 or 673 K giving grain sizes for both conditions of ∼0.15 and ∼0.30 μm for these two processing temperatures, respectively. Tensile testing was conducted at 673 K and superplastic elongations were achieved in both the annealed and the solution treated samples, with a maximum elongation of 570% for an annealed specimen processed by HPT at 293 K. To check on the significance of microstructural inhomogeneities across the HPT disks, samples were machined either from the center of the disks or from an off-center position. The experimental results show that higher elongations are achieved at the off-center position. The similarity between the annealed and the solution treated conditions after HPT is attributed to a dissolution of precipitates during HPT processing.
UR - http://www.scopus.com/inward/record.url?scp=27944471431&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=27944471431&partnerID=8YFLogxK
U2 - 10.1016/j.msea.2005.07.023
DO - 10.1016/j.msea.2005.07.023
M3 - Article
AN - SCOPUS:27944471431
VL - 408
SP - 141
EP - 146
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
SN - 0921-5093
IS - 1-2
ER -