3D atom probe investigation of the nanostructure of a commercial 6061 aluminum alloy processed by SPD. / Nurislamova, G.; Sauvage, X.; Murashkin, M.; Valiev, R.
Ultrafine Grained Materials IV. 2006. p. 41-45 (TMS Annual Meeting; Vol. 2006).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Research
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TY - GEN
T1 - 3D atom probe investigation of the nanostructure of a commercial 6061 aluminum alloy processed by SPD
AU - Nurislamova, G.
AU - Sauvage, X.
AU - Murashkin, M.
AU - Valiev, R.
PY - 2006/5/18
Y1 - 2006/5/18
N2 - Aluminum alloys processed by severe plastic deformation (SPD) usually exhibit a significant increase of the mechanical strength and even superplasticity due to the strong grain size reduction. The 6061 commercial aluminum alloy is heat treatable and its remarkably high hardness after aging is due to a fine distribution of nanoscaled precipitates containing Mg and Si. It was shown however that its hardness could be significantly increased thanks to equal channel angular pressure (ECAP) processing before the aging treatment. The aim of this work is to investigate such nanostructure resulting from SPD to understand these unusual mechanical properties. A solutionized 6061 aluminum alloy was processed by ECAP and aged. Then, the distribution of alloying elements (Mg and Si) was mapped out in 3D at the atomic scale thanks to the three-dimensional atom probe (3D-AP) technique. In this paper, we discuss the precipitation kinetics induced by SPD and deformation mechanisms leading to high mechanical properties of these alloys.
AB - Aluminum alloys processed by severe plastic deformation (SPD) usually exhibit a significant increase of the mechanical strength and even superplasticity due to the strong grain size reduction. The 6061 commercial aluminum alloy is heat treatable and its remarkably high hardness after aging is due to a fine distribution of nanoscaled precipitates containing Mg and Si. It was shown however that its hardness could be significantly increased thanks to equal channel angular pressure (ECAP) processing before the aging treatment. The aim of this work is to investigate such nanostructure resulting from SPD to understand these unusual mechanical properties. A solutionized 6061 aluminum alloy was processed by ECAP and aged. Then, the distribution of alloying elements (Mg and Si) was mapped out in 3D at the atomic scale thanks to the three-dimensional atom probe (3D-AP) technique. In this paper, we discuss the precipitation kinetics induced by SPD and deformation mechanisms leading to high mechanical properties of these alloys.
KW - Aging
KW - Aluminum alloy 6061
KW - Equal-channel angular pressing
KW - Precipitates
KW - Tensile tests
KW - Three- dimensional atom probe
UR - http://www.scopus.com/inward/record.url?scp=33646530942&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:33646530942
SN - 0873396286
SN - 9780873396288
T3 - TMS Annual Meeting
SP - 41
EP - 45
BT - Ultrafine Grained Materials IV
T2 - 2006 TMS Annual Meeting
Y2 - 12 March 2006 through 16 March 2006
ER -
ID: 42940874