Effects of modulation periods on mechanical properties of V/VN nano-multilayers. Issue 8 (1st June 2019)

• Record Type: Journal Article
• Authors: Fu, Tao; Zhang, Zijian; Peng, Xianghe; Weng, Shayuan; Miao, Yuhan; Zhao, Yinbo; Fu, Shaoyun; Hu, Ning
• Is Part Of: Ceramics international. Volume 45:Issue 8(2019)
• Page Start: 10295
• Page End: 10303
• Publication Date: 2019-06-01
• Subjects: V/VN nano-multilayers -- MD simulations -- Modulation period -- Interface -- Dislocation; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2019.02.084
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: 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 ( λ s) 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.