A new tip area function for instrumented nanoindentation at extremely small contact depths

Liu, Sheng, Gu, Yuantong and Huang, Han (2011) A new tip area function for instrumented nanoindentation at extremely small contact depths. Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 528 27: 7948-7951. doi:10.1016/j.msea.2011.07.025


Author Liu, Sheng
Gu, Yuantong
Huang, Han
Title A new tip area function for instrumented nanoindentation at extremely small contact depths
Journal name Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing   Check publisher's open access policy
ISSN 0921-5093
Publication date 2011-10-15
Sub-type Article (original research)
DOI 10.1016/j.msea.2011.07.025
Volume 528
Issue 27
Start page 7948
End page 7951
Total pages 4
Place of publication Switzerland
Publisher Elsevier S.A.
Collection year 2012
Language eng
Abstract The accuracy of measurement of mechanical properties of a material using instrumented nanoindentation at extremely small penetration depths heavily relies on the determination of the contact area of the indenter. Our experiments have demonstrated that the conventional area function could lead to a significant error when the contact depth was below 40 nm, due to the singularity in the first derivation of the function in this region and thus, the resultant unreasonable sharp peak on the function curve. In this paper, we proposed a new area function that was used to calculate the contact area for the indentations where the contact depths varied from 10 to 40 nm. The experimental results have shown that the new area function has produced better results than the conventional function.
Keyword Nanoindentation
Modulus
Hardness
Area function
Nitride Thin-Films
Mechanical-Properties
Elastic-Modulus
Hardness
Indentation
Substrate
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2012 Collection
 
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