TY  - JOUR
U1  - Wissenschaftlicher Artikel
A1  - Cui, Yan
A1  - Torrents Abad, Oscar
A1  - Wang, Fei
A1  - Huang, Ping
A1  - Lu, Tian-Jian
A1  - Xu, Ke-Wei
A1  - Wang, Jian
T1  - Plastic deformation modes of CuZr/Cu multilayers
JF  - Scientific Reports
N2  - We synthesized CuZr/Cu multilayers and performed nanoindentation testing to explore the dependence of plastic deformation modes on the thickness of CuZr layers. The Cu layers were 18 nm thick and the CuZr layers varied in thickness from 4 nm to 100 nm. We observed continuous plastic co-deformation in the 4 nm and 10 nm CuZr − 18 nm Cu multilayers and plastic-induced shear instability in thick CuZr layers (>20 nm). The plastic co-deformation is ascribed to the nucleation and interaction of shear transformation zones in CuZr layers at the adjacent interfaces, while the shear instability is associated with the nucleation and propagation of shear bands in CuZr layers. Shear bands are initialized in the CuZr layers due to the accumulated glide dislocations along CuZr-Cu interfaces, and propagate into adjacent Cu layers via slips on {111} plane non-parallel to the interface. Due to crystallographic constraint of the Cu layers, shear bands are approximately parallel to {111} plane in the Cu layer.
KW  - bulk metallic glasses
KW  - nanolayered composites
KW  - shear bands
KW  - interfaces
KW  - micropillars
KW  - mechanisms
KW  - transition
KW  - strength
KW  - behavior
Y1  - 2016
UN  - https://nbn-resolving.org/urn:nbn:de:bsz:291:415-3113
SN  - 2045-2322
SS  - 2045-2322
U6  - https://doi.org/10.1038/srep23306
DO  - https://doi.org/10.1038/srep23306
VL  - 6
SP  - 23306
S1  - 23306
ER  -