Evaluation of anisotropy of yield stress using surface in-plane displacements around an indentation residual imprint

This study proposed a practical method to evaluate the anisotropy of yield stress using spherical indentation with in-plane surface radial displacements around residual imprint measured by the digital image correlation method for metallic material without indentation curve. The relation between the...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2023-07, Vol.879, p.145220, Article 145220
Main Authors: Lee, Junsang, Kwon, Oh Min, Lee, Kyungyul, Kim, Kyung Il, Kim, Soo-Hyun, Kim, Young-Cheon, Kwon, Dongil, Kim, Jong-hyoung, Kang, Seung-Kyun
Format: Article
Language:English
Subjects:
Anisotropy of materials
Digital image correlation
Finite element analysis
Mechanical properties
Spherical indentation
Surface displacement
Tensile properties
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Summary:This study proposed a practical method to evaluate the anisotropy of yield stress using spherical indentation with in-plane surface radial displacements around residual imprint measured by the digital image correlation method for metallic material without indentation curve. The relation between the ratio of yield stresses and the in-plane displacements developed on the surface was analyzed using finite element method (FEM) simulations for the materials with various mechanical properties. The development of radial displacements depends on the anisotropy of the yield stresses, and the ratio between radial displacement values on principal directions has a strong relation with the anisotropy of the yield stresses. An analytical solution for predicting the ratio of yield stresses was developed and it was verified using experimental data with anisotropic materials. The results for various metallic materials showed the feasibility of the proposed model with good accuracy. •We estimated anisotropy of yield stresses using surface in-plane displacements after spherical indentation.•Ratio of surface radial displacements along principal directions has a strong relation with anisotropy of yield stresses.•Anisotropic materials were tested and the prediction of anisotropy of yield stresses using the proposed method show good accuracy within a 10% error.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2023.145220