Improvement of mechanical properties of magnesium alloy ZK60 by integrated extrusion and equal channel angular pressing
Orlov, Dmitry LU
; Raab, George
; Lamark, Torbjorn T.
; Popov, Mikhail
and Estrin, Yuri
(2011)
In Acta Materialia
59(1).
p.375-385
- Abstract
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... (More)
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.
(Less)
- author
- Orlov, Dmitry
LU
; Raab, George
; Lamark, Torbjorn T.
; Popov, Mikhail
and Estrin, Yuri
- publishing date
- 2011-01
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Equal channel angular pressing, Extrusion, Magnesium alloys, Mechanical properties, Microstructure
- in
- Acta Materialia
- volume
- 59
- issue
- 1
- pages
- 11 pages
- publisher
- Elsevier
- external identifiers
-
- scopus:78049527034
- ISSN
- 1359-6454
- DOI
- 10.1016/j.actamat.2010.09.043
- language
- English
- LU publication?
- no
- id
- a7623efb-5f97-4239-bd3d-a32b315dc76c
- date added to LUP
- 2016-06-20 15:38:30
- date last changed
- 2022-04-16 17:58:54
@article{a7623efb-5f97-4239-bd3d-a32b315dc76c,
abstract = {{<p>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.</p>}},
author = {{Orlov, Dmitry and Raab, George and Lamark, Torbjorn T. and Popov, Mikhail and Estrin, Yuri}},
issn = {{1359-6454}},
keywords = {{Equal channel angular pressing; Extrusion; Magnesium alloys; Mechanical properties; Microstructure}},
language = {{eng}},
number = {{1}},
pages = {{375--385}},
publisher = {{Elsevier}},
series = {{Acta Materialia}},
title = {{Improvement of mechanical properties of magnesium alloy ZK60 by integrated extrusion and equal channel angular pressing}},
url = {{http://dx.doi.org/10.1016/j.actamat.2010.09.043}},
doi = {{10.1016/j.actamat.2010.09.043}},
volume = {{59}},
year = {{2011}},
}