Abstract
In the paper we show that grain boundary sliding dominates in the creep of A999 aluminum polycrystals and is accommodated by rotation modes of intragranular deformation. Accommodation mechanisms strongly depend on the applied stress σ and creep temperature T. At low σ and T, accommodation occurs by dislocation glide and mesoscale fragmentation. At high σ and T, there appears lattice curvature, which causes the development of shear bands, multiscale fragmentation, and formation of a quasi-neck with nanosized subgrains and plastic microrotations. Noncrystallographic shears in their subboundaries propagate in local lattice curvature zones under τmax by the plastic distortion mechanism.
| Original language | English |
|---|---|
| Pages (from-to) | 276-284 |
| Number of pages | 9 |
| Journal | Materials Science and Engineering A |
| Volume | 733 |
| DOIs | |
| Publication status | Published - 22 Aug 2018 |
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Keywords
- Creep
- Fracture
- Grain boundary sliding
- Grains and interfaces
- High-purity aluminum polycrystals
- Plasticity methods
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
Cite this
Grain boundary sliding and rotational mechanisms of intragranular deformation at different creep stages of high-purity aluminum polycrystals at various temperatures and stresses. / Panin, V. E.; Surikova, N. S.; Elsukova, T. F.; Vlasov, I. V.; Borisyuk, D. V.
In: Materials Science and Engineering A, Vol. 733, 22.08.2018, p. 276-284.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Grain boundary sliding and rotational mechanisms of intragranular deformation at different creep stages of high-purity aluminum polycrystals at various temperatures and stresses
AU - Panin, V. E.
AU - Surikova, N. S.
AU - Elsukova, T. F.
AU - Vlasov, I. V.
AU - Borisyuk, D. V.
PY - 2018/8/22
Y1 - 2018/8/22
N2 - In the paper we show that grain boundary sliding dominates in the creep of A999 aluminum polycrystals and is accommodated by rotation modes of intragranular deformation. Accommodation mechanisms strongly depend on the applied stress σ and creep temperature T. At low σ and T, accommodation occurs by dislocation glide and mesoscale fragmentation. At high σ and T, there appears lattice curvature, which causes the development of shear bands, multiscale fragmentation, and formation of a quasi-neck with nanosized subgrains and plastic microrotations. Noncrystallographic shears in their subboundaries propagate in local lattice curvature zones under τmax by the plastic distortion mechanism.
AB - In the paper we show that grain boundary sliding dominates in the creep of A999 aluminum polycrystals and is accommodated by rotation modes of intragranular deformation. Accommodation mechanisms strongly depend on the applied stress σ and creep temperature T. At low σ and T, accommodation occurs by dislocation glide and mesoscale fragmentation. At high σ and T, there appears lattice curvature, which causes the development of shear bands, multiscale fragmentation, and formation of a quasi-neck with nanosized subgrains and plastic microrotations. Noncrystallographic shears in their subboundaries propagate in local lattice curvature zones under τmax by the plastic distortion mechanism.
KW - Creep
KW - Fracture
KW - Grain boundary sliding
KW - Grains and interfaces
KW - High-purity aluminum polycrystals
KW - Plasticity methods
UR - http://www.scopus.com/inward/record.url?scp=85050282370&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85050282370&partnerID=8YFLogxK
U2 - 10.1016/j.msea.2018.07.038
DO - 10.1016/j.msea.2018.07.038
M3 - Article
VL - 733
SP - 276
EP - 284
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
ER -