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New insights into nanoindentation crack initiation in ion-exchanged sodium aluminosilicate glass

Li, X, Jang, L, Mohagheghian, Iman, Dear, J, Li, L and Yan, Y (2018) New insights into nanoindentation crack initiation in ion-exchanged sodium aluminosilicate glass Journal of the American Ceramic Society, 101 (7). pp. 2930-2940.

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Abstract

The effect of ion-exchange on the fracture behavior and the threshold load is investigated for radial crack initiation resulting from cube-corner indentation. Both tin and air sides of the sodium aluminosilicate float glass are considered. The threshold load and mechanical properties are experimentally measured by nanoindentation. A qualitative explanation of crack initiation is developed by analyzing the stresses at the indentation site. The ion-exchanged glasses show a lower threshold load for radial crack initiation with a cube-corner indenter than the raw glass, and this is due to a higher crack driving stress for ion-exchanged glasses. However, the compressive stress on the surface of the ion-exchanged glasses can inhibit the expanding of the radial cracks. The air side always shows higher values for the threshold load than the tin side before and after ion-exchange, which is in accordance with the calculated crack driving stress results.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Authors :
NameEmailORCID
Li, X
Jang, L
Mohagheghian, Imani.mohagheghian@surrey.ac.uk
Dear, J
Li, L
Yan, Y
Date : 27 January 2018
Identification Number : 10.1111/jace.15465
Copyright Disclaimer : © 2018 The American Ceramic Society. This is the peer reviewed version of the following article: Li X, Jiang L, Mohagheghian I, Dear JP, Li L, Yan Y. New insights into nanoindentation crack initiation in ion-exchanged sodium aluminosilicate glass. J Am Ceram Soc. 2018;00:1–11. https://doi.org/10.1111/jace.15465, which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1111/jace.15465/abstract. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Uncontrolled Keywords : ion-exchange; threshold load; crack initiation; cube-corner
Depositing User : Melanie Hughes
Date Deposited : 13 Feb 2018 15:54
Last Modified : 23 May 2018 16:04
URI: http://epubs.surrey.ac.uk/id/eprint/845833

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