Open AccessThe proposition of analytical expression HM–(√P/S) in microindentation pile-up deformation mode
Author(s) -
Samir Habibi,
Djamel Zddine Semsoum,
Soufiane Benaissa,
Hassen Merzouk
Publication year - 2022
Publication title -
frattura ed integrità strutturale
Language(s) - English
Resource type - Journals
ISSN - 1971-8993
DOI - 10.3221/igf-esis.60.28
Subject(s) - indentation , materials science , composite material , stiffness , pile , structural engineering , engineering
In this article, the characteristic curves of microindentation measured on Cu99 were analyzed on the basis of the analytical expression proposed by Habibi et al. (J. Mater. Res, 2021, 36 (15): 3074-3085). It was found that the ratio of the applied load to the square of the displacement, P/(h+h0)2, does not remain constant during the loading segment of the microindentation test. An empirical expression for the determination of Martens hardness as a function of indentation load, contact stiffness and reduced modulus of elasticity by analyzing indentation load curves has been proposed for pile-up mode strain with the corrections imposed by the tip defect, the compliance of the instrument and the axial axisymmetry coefficient of the Vickers indenter. The results from microindentation tests on this examined ductile material show excellent agreement.