TY - JOUR
T1 - Effects of modulation periods on mechanical properties of V/VN nano-multilayers
AU - Fu, Tao
AU - Zhang, Zijian
AU - Peng, Xianghe
AU - Weng, Shayuan
AU - Miao, Yuhan
AU - Zhao, Yinbo
AU - Fu, Shaoyun
AU - Hu, Ning
N1 - Funding Information:
The work is supported by National Natural Science Foundation of China ( 11802045 , 11332013 and 11802047 ), Chongqing Postdoctoral Program for Innovative Talents ( CQBX201804 ), China Postdoctoral Science Foundation funded project ( 2018M631058 ), and Chongqing Research Program of Basic Research and Frontier Technology ( cstc2018jcyjAX0522 ). MD simulations were carried out at Supercomputing Center of Lv Liang Cloud Computing Center in China.
PY - 2019/6/1
Y1 - 2019/6/1
N2 - Metal/ceramic nano-multilayers, which possess the advantages of both metal and ceramics, have attracted intensive attention. In this work, the mechanical properties of V/VN nano-multilayers with different modulation periods (λs) were investigated using molecular dynamics simulations. The relationships between the microstructures and stress-strain (σ - ε) curves during in-plane tension and out-of-plane compression were explored, and the effects of λ were discussed. It shows that: (i) three kinds of V/VN nano-multilayers with different interfacial structures have different stabilities during deformation; (ii) dislocations nucleate firstly from the interfaces, propagate on {111} planes in VN layers, and deposit on the adjacent interface, and finally shift to V layers with the increase of applied strain; (iii) the nano-multilayer with larger λ has larger elastic modulus, elastic limit and lattice integrity, and strain hardening and cracks would appear in the nano-multilayers with λ > 42.90 Å.
AB - Metal/ceramic nano-multilayers, which possess the advantages of both metal and ceramics, have attracted intensive attention. In this work, the mechanical properties of V/VN nano-multilayers with different modulation periods (λs) were investigated using molecular dynamics simulations. The relationships between the microstructures and stress-strain (σ - ε) curves during in-plane tension and out-of-plane compression were explored, and the effects of λ were discussed. It shows that: (i) three kinds of V/VN nano-multilayers with different interfacial structures have different stabilities during deformation; (ii) dislocations nucleate firstly from the interfaces, propagate on {111} planes in VN layers, and deposit on the adjacent interface, and finally shift to V layers with the increase of applied strain; (iii) the nano-multilayer with larger λ has larger elastic modulus, elastic limit and lattice integrity, and strain hardening and cracks would appear in the nano-multilayers with λ > 42.90 Å.
KW - Dislocation
KW - Interface
KW - MD simulations
KW - Modulation period
KW - V/VN nano-multilayers
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U2 - 10.1016/j.ceramint.2019.02.084
DO - 10.1016/j.ceramint.2019.02.084
M3 - Article
AN - SCOPUS:85061631851
VL - 45
SP - 10295
EP - 10303
JO - Ceramics International
JF - Ceramics International
SN - 0272-8842
IS - 8
ER -