Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 4390-4398 |
| Journal | Journal of Materials Science |
| Volume | 51 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 2016 |
| MoE publication type | A1 Journal article-refereed |
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An investigation into the effect of substrate on the load-bearing capacity of thin hard coatings. / Wang, Chuan Ting (Corresponding Author); Hakala, Timo J.; Laukkanen, Anssi; Ronkainen, Helena; Holmberg, Kenneth; Gao, Nong; Wood, Robert J.K.; Langdon, Terence G.
In: Journal of Materials Science, Vol. 51, No. 9, 2016, p. 4390-4398.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - An investigation into the effect of substrate on the load-bearing capacity of thin hard coatings
AU - Wang, Chuan Ting
AU - Hakala, Timo J.
AU - Laukkanen, Anssi
AU - Ronkainen, Helena
AU - Holmberg, Kenneth
AU - Gao, Nong
AU - Wood, Robert J.K.
AU - Langdon, Terence G.
PY - 2016
Y1 - 2016
N2 - TiN and diamond-like carbon (DLC) coatings were deposited on Ti substrates with and without processing by high-pressure torsion (HPT). The HPT processing refined the grain size of titanium from the coarse-grained (CG) size of ~8.6 µm to the ultra-fine grained (UFG) size of ~130 nm and increased the hardness from ~1.83 to ~3.05 GPa. Scratch test results revealed that all the thin hard coatings had a higher critical load when deposited on the harder UFG Ti substrate compared to those deposited on the softer CG Ti. A three-dimensional finite element model (3D FEM) revealed that the improved load-carrying property of the thin hard coatings on the harder titanium substrates was related to the higher stresses generated within the substrate and its deformation behaviour which reduced the strain at the coating/substrate interface. A model based on the hardness of a two-layered composite was used to explain this effect, and it is shown that the model is reasonably successful in predicting the critical load of a wide range of coating-substrate systems. The analytical model and the results of the 3D FEM modelling emphasize the contribution of the substrate to the load-bearing capacity of thin coatings.
AB - TiN and diamond-like carbon (DLC) coatings were deposited on Ti substrates with and without processing by high-pressure torsion (HPT). The HPT processing refined the grain size of titanium from the coarse-grained (CG) size of ~8.6 µm to the ultra-fine grained (UFG) size of ~130 nm and increased the hardness from ~1.83 to ~3.05 GPa. Scratch test results revealed that all the thin hard coatings had a higher critical load when deposited on the harder UFG Ti substrate compared to those deposited on the softer CG Ti. A three-dimensional finite element model (3D FEM) revealed that the improved load-carrying property of the thin hard coatings on the harder titanium substrates was related to the higher stresses generated within the substrate and its deformation behaviour which reduced the strain at the coating/substrate interface. A model based on the hardness of a two-layered composite was used to explain this effect, and it is shown that the model is reasonably successful in predicting the critical load of a wide range of coating-substrate systems. The analytical model and the results of the 3D FEM modelling emphasize the contribution of the substrate to the load-bearing capacity of thin coatings.
KW - ProperTune
U2 - 10.1007/s10853-016-9751-8
DO - 10.1007/s10853-016-9751-8
M3 - Article
VL - 51
SP - 4390
EP - 4398
JO - Journal of Materials Science
JF - Journal of Materials Science
SN - 0022-2461
IS - 9
ER -