The proposition of analytical expression HM–(√P/S) in microindentation pile-up deformation mode

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Published Mar 25, 2022
DOI https://doi.org/10.3221/IGF-ESIS.60.28

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Samir Habibi
Laboratory of Industrial Engineering and Sustainable Development (LGIDD, Department of Mechanical Engineering, Ahmed Zabana University of Relizane, 48000, Algeria.
Djamel Zddine Semsoum
LGIDD, Department of Mechanical Engineering, Mustapha Stambouli University of Mascara, 29000, Algeria.
Soufiane Benaissa 
LGIDD, Department of Mechanical Engineering, Mustapha Stambouli University of Mascara, 29000, Algeria.
Hassen Merzouk
LGIDD, Department of Mechanical Engineering, Mustapha Stambouli University of Mascara, 29000, Algeria.

Abstract

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.

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    Issue
    Vol. 16 No. 60 (2022): April 2022
    Section
    Advanced Manufacturing and Surface Treatment

    How to Cite

    Habibi, S. (2022) “The proposition of analytical expression HM–(√P/S) in microindentation pile-up deformation mode”, Frattura ed Integrità Strutturale, 16(60), pp. 407–415. doi: 10.3221/IGF-ESIS.60.28.
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