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Home  >  Journal list  >  Journal of the Society of Materials Science, Japan  >  Vol.56  No.6 (2007)  >  pp.510-515

Journal of the Society of Materials Science, Japan
<<Previous article Vol.56  No.6 (2007)   pp.510 - 515 Next article>>

Development of Instrumented Indentation Microscope and Its Application to Indentation Contact Mechanics

Norio HAKIRI1), Mototsugu SAKAI1) and Tatsuya MIYAJIMA2)
1) Dept. of Mat. Sci., Toyohashi Univ. Tech.
2) Res. Inst. of Instrumentation Frontier, AIST


An instrumented indentation microscope is developed for determining the in-situ contact area during indentation loading/unloading, and then applied to examining the Meyer hardness and the elastic modulus of several engineering materials ranging from ductile metals to brittle ceramics. Since it is capable of making the in-situ optical observation of indentation contact impression and the determination of contact area that is synchronized to the hysteresis curve of indentation load-penetration depth relation, the mechanical properties determined on the indentation microscope are precise and reliable without any undesirable approximations and assumptions required for estimating the contact area in the conventional test systems. It is also demonstrated that the instrumented indentation microscope is very efficient for determining in a quantitative manner the in-situ contact profiles of impression (sink-in/pile-up profiles). Through the present studies for the experimental determinations of the Meyer hardness HM, elastic modulus E', and the consideration on the sink-in/pile-up profiles of contact impressions, it is emphasized that the direct measurement of contact area Ac by the use of the indentation microscope is very essential in examining the mechanical properties of materials in micro-scales. The present work suggests that the instrumented indentation microscope will be a powerful tool in the science and engineering of indentation contact mechanics.


Keyword:
Indentation contact mechanics, In-situ measurement of contact area, Sink-in/pile-up, Elasticity/Plasticity

Received: August 29, 2006
Published online: June 21, 2007
Copyright (c) 2007 by The Society of Materials Science, Japan

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