Strength of Commercial Aluminum Alloys after Equal Channel Angular Pressing and Post-ECAP Processing |
| Journal |
Solid State Phenomena (Volume 114) |
| Volume |
High Pressure Technology of Nanomaterials |
| Edited by |
Witold Lojkowski and John R. Blizzard |
| Pages |
91-96 |
| DOI |
10.4028/www.scientific.net/SSP.114.91 |
| Online since |
July, 2006 |
| Authors |
Maxim Yu. Murashkin,
M.V. Markushev,
Julia Ivanisenko,
Ruslan Z. Valiev
|
| Keywords |
Aging, Aluminum Alloy, Equal Channel Angular Pressing (ECAP), Rolling, Strength |
| Abstract |
The effects of equal channel angular pressing (ECAP), further heat treatment and rolling
on the structure and room temperature mechanical properties of the commercial aluminum alloys
6061 (Al-0.9Mg-0.7Si) and 1560 (Al-6.5Mg-0.6Mn) were investigated. It has been shown that the
strength of the alloys after ECAP is higher than that achieved after conventional processing. Prior
ECAP solution treatment and post-ECAP ageing can additionally increase the strength of the 6061
alloy. Under optimal ageing conditions a yield strength (YS) of 434 MPa and am ultimate tensile
strength (UTS) of 470 MPa were obtained for the alloy. Additional cold rolling leads to a YS and
UTS of 475 and 500 MPa with 8% elongation.
It was found that the post-ECAP isothermal rolling of the 1560 alloy resulted in the formation of a
nano-fibred structure and a tensile strength (YS = 540 MPa and UTS = 635 MPa) that has never
previously been observed in commercial non-heat treatable alloys. |
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