Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 375 - 385 |
| Number of pages | 11 |
| Journal | Acta Materialia |
| Volume | 59 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2011 |
Cite this
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Improvement of mechanical properties of magnesium alloy ZK60 by integrated extrusion and equal channel angular pressing. / Orlov, Dmytro; Raab, George; Lamark, Torbjorn; Popov, Mikhail; Estrin, Yuri.
In: Acta Materialia, Vol. 59, No. 1, 2011, p. 375 - 385.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - Improvement of mechanical properties of magnesium alloy ZK60 by integrated extrusion and equal channel angular pressing
AU - Orlov, Dmytro
AU - Raab, George
AU - Lamark, Torbjorn
AU - Popov, Mikhail
AU - Estrin, Yuri
PY - 2011
Y1 - 2011
N2 - The paper demonstrates the feasibility of upscaling of severe plastic deformation (SPD) techniques using an integrated process that combines conventional extrusion and equal channel angular pressing in a single processing step. The process was applied for production of magnesium ZK60 bars 16 mm in diameter and up to 4 m in length. The processed material exhibited an excellent balance of strength and tensile ductility. It had a yield strength of 310 MPa and the ultimate tensile strength of 351 MPa. The total elongation of 17.1% was about 2.5 times and the reduction in area of 42.5% was more than 10 times larger than the corresponding values in the as-received condition. A transition from brittle to ductile fracture suggesting a change in the deformation mechanisms was also found in the material processed by the integrated SPD technique. Analysis of microstructure and texture of the SPD-processed bars showed that this excellent combination of strength and ductility can be attributed to the synergy of fine-grained microstructure and favorable texture promoting basal slip (in concert with non-basal slip), yet not to an extent that strength is sacrificed. The possibility to produce long bars of ZK60 with exceptionally good mechanical properties in a “semi-continuous” process is a promising opportunity for the transfer of severe plastic deformation processing to industrial manufacturing scale.
AB - The paper demonstrates the feasibility of upscaling of severe plastic deformation (SPD) techniques using an integrated process that combines conventional extrusion and equal channel angular pressing in a single processing step. The process was applied for production of magnesium ZK60 bars 16 mm in diameter and up to 4 m in length. The processed material exhibited an excellent balance of strength and tensile ductility. It had a yield strength of 310 MPa and the ultimate tensile strength of 351 MPa. The total elongation of 17.1% was about 2.5 times and the reduction in area of 42.5% was more than 10 times larger than the corresponding values in the as-received condition. A transition from brittle to ductile fracture suggesting a change in the deformation mechanisms was also found in the material processed by the integrated SPD technique. Analysis of microstructure and texture of the SPD-processed bars showed that this excellent combination of strength and ductility can be attributed to the synergy of fine-grained microstructure and favorable texture promoting basal slip (in concert with non-basal slip), yet not to an extent that strength is sacrificed. The possibility to produce long bars of ZK60 with exceptionally good mechanical properties in a “semi-continuous” process is a promising opportunity for the transfer of severe plastic deformation processing to industrial manufacturing scale.
UR - http://www.elsevier.com/wps/find/journaldescription.cws_home/221/description#description
U2 - 10.1016/j.actamat.2010.09.043
DO - 10.1016/j.actamat.2010.09.043
M3 - Article
VL - 59
SP - 375
EP - 385
JO - Acta Materialia
JF - Acta Materialia
SN - 1359-6454
IS - 1
ER -