Local mechanical properties of materials based on matrix-particles system Online publication date: Sat, 28-Feb-2015
by Ladislav Pesek, Pavol Zubko, Michal Besterci
International Journal of Materials and Product Technology (IJMPT), Vol. 40, No. 3/4, 2011
Abstract: In this study, the local mechanical properties: indentation modulus EIT and indentation hardness HIT were experimentally investigated on two matrix-particle systems using depth-sensing indentation technique with a sharp Vickers and Berkovich indenter. The continuous stiffness measurement (CSM) technique was used to obtain the depth profiles of both measured values, which allowed separation of some effects that could affect the results. The investigated materials were interstitial free steel sheet and an Al-Al4C3 alloy prepared by mechanical alloying. Indentation curves obtained on individual particles were analysed in detail with respect to particle fracturing and/or penetrating of the particle into the matrix as a secondary indenter. Due to sample preparation the measured hardness can be affected up to 2.5 times, while the modulus value remains unaffected. The HIT and EIT values as well the deformation work for matrix and for the particles are included in the article.
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