Method to account for true contact area in soda-lime glass during nanoindentation with the Berkovich tip
2005 (English)In: Materials Science & Engineering: A, ISSN 0921-5093, Vol. 404, no 1-2, 1-8 p.Article in journal (Refereed) Published
An. empirical relationship for estimating the pile-up contact area from the contact stiffness, S and the contact depth, h(c) has been developed. This was achieved first by using the atomic force microscope to image nanoindents made with the Berkovich indenter in soda-lime glass and approximating the pile-up contact perimeter as a semi-ellipse. Then, by determining the pile-up contact area for several peak indentation loads, a correlation was found between the pile-up contact area and the load used to generate it. The importance of this new method of determining the pile-up contact area is that the need for indent imaging is made completely redundant, since the contact stiffness is a quantity that is routinely obtained during nanoindentation data analysis. Elastic modulus of soda-lime glass of 70 +/- 1.5 GPa is measured with loads ranging from 20 to 500 mN. The hardness measured also falls within the range of values, 5.2-5.9 GPa, normally quoted in the literature for the glass.
Place, publisher, year, edition, pages
2005. Vol. 404, no 1-2, 1-8 p.
soda-lime glass, true contact area, contact stiffness, nanoindentation, Berkovich tip
IdentifiersURN: urn:nbn:se:kth:diva-38324DOI: 10.1016/j.msea.2005.06.006ISI: 000232252800001ScopusID: 2-s2.0-23944519470OAI: oai:DiVA.org:kth-38324DiVA: diva2:436771
QC 201108242011-08-242011-08-242012-03-21Bibliographically approved