The P–h2 relationship on load–displacement curve considering pile-up deformation mode in instrumented indentation

Autor: A. Mezough, S. Benaissa, Alberto Mejias, E. Zareb, Didier Chicot, H. Merzouk, D. E. Semsoum, B. Boutabout, S. Habibi
Přispěvatelé: Laboratoire de Mécanique de Lille - FRE 3723 (LML), Université de Lille, Sciences et Technologies-Centrale Lille-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Génie Civil et Géo-Environnement (LGCgE) - ULR 4515 (LGCgE), Université d'Artois (UA)-Université de Lille-Ecole nationale supérieure Mines-Télécom Lille Douai (IMT Lille Douai), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)
Rok vydání: 2021
Předmět:
Zdroj: Journal of Materials Research
Journal of Materials Research, 2021, 36 (15), pp.3074-3085. ⟨10.1557/s43578-021-00286-3⟩
ISSN: 2044-5326
0884-2914
Popis: A microhardness tester equipped with a Vickers indenter allows the determination of mechanical properties of a large variety of materials by analyzing load–displacement curves. In present work, a new model to compute the coefficient of proportionality K (named K-factor) between P and h relating to the pile-up have been developed. It was proved that indenter tip defect must be absolutely considered for an accurate determination of the contact area reducing an overestimation of mechanical properties and better fitting the loading curve. The proposed model is validated on a large variety of materials, i.e. carbides, nitrides and oxides showing sink-in phenomenon and steel, stainless steel, brass, bronze and copper having pile-up deformation mode. The model is compared with previous developed ones for sink-in and pile-up that can be easily applied but ignoring deformation mode and discarding the indenter defects will lead to not quite right no phenomenologically representative mechanical properties.
Databáze: OpenAIRE
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