On the variation of mechanical parameters obtained from spherical depth sensing indentation
by N. Oumarou, J-Ph. Jehl, R. Kouitat, Ph. Stempfle
International Journal of Surface Science and Engineering (IJSURFSE), Vol. 4, No. 4/5/6, 2010

Abstract: We present an analysis of spherical depth sensing indentation. In this paper, the Oliver and Pharr methodology is applied to the experimental load-displacement curves and those obtained numerically for determining hardness H and Young's modulus E. The numerical results are obtained by BEM code. The observed variations with respect to load of the elastic modulus and the hardness as obtained by the Oliver and Pharr methodology are correlated with plastic zone shape. In the case of isotropic homogeneous material, numerical results show that almost constant elastic modulus is obtained when the plastic zone has developed up to the free surface. In the case of elastic (very hard) coating on an elastic perfectly plastic substrate, plastic deformation in the latter is followed by reverse plastic flow during unloading leading to a decrease in the calculated value of hardness.

Online publication date: Thu, 09-Sep-2010

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

 
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Surface Science and Engineering (IJSURFSE):
Login with your Inderscience username and password:

Username:        Password:          Forgotten your password?

Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email subs@inderscience.com