TY - JOUR
T1 - Analysis of the mechanical properties of TiN/Ti multilayer coatings using indentation under a broad load range
AU - Yuan, Zhanwei
AU - Han, Yutao
AU - Zang, Shunlai
AU - Chen, Jiao
AU - He, Guangyu
AU - Chai, Yan
AU - Yang, Zhufang
AU - Fu, Qinqin
N1 - Publisher Copyright:
© 2020 Elsevier Ltd and Techna Group S.r.l.
PY - 2021/4/15
Y1 - 2021/4/15
N2 - In this study, physical vapor deposition was used to prepare TiN/Ti multilayer coatings as well as the corresponding monolithic coatings for comparison. Nanoindentation using a large load range (5–4800 mN) and finite element method (FEM) simulations were conducted to investigate the influence of various multilayer structures on the mechanical behavior of multilayer coatings. The nanoindentation results show that the TiN/Ti multilayer coating has the maximum hardness and Young's modulus while retaining good crack resistance and fracture toughness. The FEM results show that increasing the number of layers in the multilayer coatings reduced the hardness and Young's modulus as well as the maximum stress, while it increased the equivalent plastic strain. As the layer thickness ratio increased, both the hardness and Young's modulus gradually increased, and the stress in the coating reached its maximum at the highest thickness ratio. In addition, to consider the effect of the indentation depth on the coating, the influence of the number of layers and the layer thickness ratio on the multilayer coating is combined into the indentation response of the multilayer coating. Therefore, we establish an expression describing the relationship between the number of layers and the ratio of the layer thickness to the mechanical properties of TiN/Ti multilayer coatings.
AB - In this study, physical vapor deposition was used to prepare TiN/Ti multilayer coatings as well as the corresponding monolithic coatings for comparison. Nanoindentation using a large load range (5–4800 mN) and finite element method (FEM) simulations were conducted to investigate the influence of various multilayer structures on the mechanical behavior of multilayer coatings. The nanoindentation results show that the TiN/Ti multilayer coating has the maximum hardness and Young's modulus while retaining good crack resistance and fracture toughness. The FEM results show that increasing the number of layers in the multilayer coatings reduced the hardness and Young's modulus as well as the maximum stress, while it increased the equivalent plastic strain. As the layer thickness ratio increased, both the hardness and Young's modulus gradually increased, and the stress in the coating reached its maximum at the highest thickness ratio. In addition, to consider the effect of the indentation depth on the coating, the influence of the number of layers and the layer thickness ratio on the multilayer coating is combined into the indentation response of the multilayer coating. Therefore, we establish an expression describing the relationship between the number of layers and the ratio of the layer thickness to the mechanical properties of TiN/Ti multilayer coatings.
KW - Finite element method
KW - Indentation
KW - Layer number
KW - Layer thickness ratio
KW - Microscale TiN/Ti multilayer coatings
UR - https://www.scopus.com/pages/publications/85098592775
U2 - 10.1016/j.ceramint.2020.12.196
DO - 10.1016/j.ceramint.2020.12.196
M3 - 文章
AN - SCOPUS:85098592775
SN - 0272-8842
VL - 47
SP - 10796
EP - 10808
JO - Ceramics International
JF - Ceramics International
IS - 8
ER -