Experimental determination of the fracture toughness via microscratch tests: Application to polymers, ceramics, and metals
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Ulm_Experimental determination.pdf
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Author(s)
Akono, Ange-Therese
Randall, Nicholas X.
Ulm, Franz-Josef
Date Issued
January 2012
Journal
Journal of Materials Research
Publisher
Cambridge University Press (Materials Research Society)
Citation
Akono, Ange-Therese, Nicholas X. Randall, and Franz-Josef Ulm. “Experimental Determination of the Fracture Toughness via Microscratch Tests: Application to Polymers, Ceramics, and Metals.” Journal of Materials Research 27.02 (2012): 485–493. ©Cambridge University Press 2012
Version
Final published version
Abstract
This article presents a novel microscratch technique for the determination of the fracture toughness of materials from scratch data. While acoustic emission and optical imaging devices provide quantitative evidence of fracture processes during scratch tests, the technique proposed here provides a quantitative means to assess the fracture toughness from the recorded forces and depth of penetration. We apply the proposed method to a large range of materials, from soft (polymers) to hard (metal), spanning fracture toughness values over more than two orders of magnitude. The fracture toughness values so obtained are in excellent agreement with toughness values obtained for the same materials by conventional fracture tests. The fact that the proposed microscratch technique is highly reproducible, almost nondestructive, and requires only small material volumes makes this technique a powerful tool for the assessment of fracture properties for microscale materials science and engineering applications.
MIT Department
Massachusetts Institute of Technology. Department of Civil and Environmental Engineering
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1557/jmr.2011.402
