Abstract
Experiments were conducted to examine the feasibility of extending conventional processing with high-pressure torsion (HPT) from use with thin disks with thickness of ∼1 mm to bulk cylindrical samples with height of ∼8 mm. Two cylindrical samples of an Al-Mg-Sc alloy were processed through 1/4 and 1 turn and then examined on different planes of sectioning. The results confirm the potential for using HPT with small cylinders but they show there are significant and systematic variations in the values of the Vickers microhardness throughout the samples after processing. After one turn in HPT, the highest values of the microhardness were achieved in the central plane around the outer edge of the sample where the hardness increased by a factor of >2 compared with the solution-treated condition. Microstructural examination revealed an array of equiaxed grains in this region with an average grain size of ∼200 nm.
| Original language | English |
|---|---|
| Pages (from-to) | 268-273 |
| Number of pages | 6 |
| Journal | Materials Science and Engineering A |
| Volume | 406 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - Oct 15 2005 |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
Cite this
Developing high-pressure torsion for use with bulk samples. / Sakai, Genki; Nakamura, Katsuaki; Horita, Zenji; Langdon, Terence G.
In: Materials Science and Engineering A, Vol. 406, No. 1-2, 15.10.2005, p. 268-273.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Developing high-pressure torsion for use with bulk samples
AU - Sakai, Genki
AU - Nakamura, Katsuaki
AU - Horita, Zenji
AU - Langdon, Terence G.
PY - 2005/10/15
Y1 - 2005/10/15
N2 - Experiments were conducted to examine the feasibility of extending conventional processing with high-pressure torsion (HPT) from use with thin disks with thickness of ∼1 mm to bulk cylindrical samples with height of ∼8 mm. Two cylindrical samples of an Al-Mg-Sc alloy were processed through 1/4 and 1 turn and then examined on different planes of sectioning. The results confirm the potential for using HPT with small cylinders but they show there are significant and systematic variations in the values of the Vickers microhardness throughout the samples after processing. After one turn in HPT, the highest values of the microhardness were achieved in the central plane around the outer edge of the sample where the hardness increased by a factor of >2 compared with the solution-treated condition. Microstructural examination revealed an array of equiaxed grains in this region with an average grain size of ∼200 nm.
AB - Experiments were conducted to examine the feasibility of extending conventional processing with high-pressure torsion (HPT) from use with thin disks with thickness of ∼1 mm to bulk cylindrical samples with height of ∼8 mm. Two cylindrical samples of an Al-Mg-Sc alloy were processed through 1/4 and 1 turn and then examined on different planes of sectioning. The results confirm the potential for using HPT with small cylinders but they show there are significant and systematic variations in the values of the Vickers microhardness throughout the samples after processing. After one turn in HPT, the highest values of the microhardness were achieved in the central plane around the outer edge of the sample where the hardness increased by a factor of >2 compared with the solution-treated condition. Microstructural examination revealed an array of equiaxed grains in this region with an average grain size of ∼200 nm.
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U2 - 10.1016/j.msea.2005.06.049
DO - 10.1016/j.msea.2005.06.049
M3 - Article
AN - SCOPUS:26944490349
VL - 406
SP - 268
EP - 273
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 -