Abstract
Stress–Strain plots based on nanoindentation load–depth curves were obtained to study phenomena like internal fracture and ductile to brittle transitions. Fracture phenomena during the indentation process were analyzed based on the stress–strain plots. A transition from ductile to brittle fracture was observed on increasing the depth or load of indenter penetration. A new approach with shape factors in the fracture studies based on radial crack branching and micro-cracking was done. Hardness and modulus plots were fitted with polynomials. The fitting parameters were varied to obtain different hardness and modulus responses.
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The authors acknowledge Dr. S. K. Mishra for carrying out the experimental work at CSIR-National Metallurgical Laboratory, Jamshedpur. The article is self-archived in arXiv.org (Ref 26).
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This article is an invited paper selected from presentations at “ICETINN-2017, International Conference on Emerging Trends in Nanoscience and Nanotechnology,” held March 16–18, 2017, in Majitar, Sikkim, India, and has been expanded from the original presentation.
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Bhattacharyya, A.S., Kumar, R.P., Priyadarshi, S. et al. Nanoindentation Stress–Strain for Fracture Analysis and Computational Modeling for Hardness and Modulus. J. of Materi Eng and Perform 27, 2719–2726 (2018). https://doi.org/10.1007/s11665-018-3289-7
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DOI: https://doi.org/10.1007/s11665-018-3289-7