| Titre : | The influence of indenter tip rounding on the indentation size effect (2011) |
| Auteurs : | Xiao Guang Qiao, Auteur ; Marco J. Starink, Auteur ; Nong Gao, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Acta materialia (Vol. 58 N° 10, Juin 2010) |
| Article en page(s) : | pp. 3690–3700 |
| Note générale : | Métallurgie |
| Langues : | Anglais |
| Tags : | Ultrafine-grained (UFG) aluminium Nanoindentation Geometrically necessary dislocations Tip rounding effect |
| Résumé : | A model was developed to interpret the indentation size effect (ISE). The model considers the tip wear effect, causing a rounded tip, the plastic zone size and various strengthening contributions, including geometrically necessary dislocations, pre-existing statistically stored dislocations and grain size. It is shown that the shape of the worn tip can be effectively determined through calibration experiments. The model is applied to predict dislocation densities, and shows a good correspondence with published data on dislocation densities in copper single crystals. The predicted ISE is shown to be in good correspondence with published data on a range of metals, and an improvement over existing models is demonstrated. |
| DEWEY : | 669 |
| ISSN : | 1359-6454 |
| En ligne : | http://www.sciencedirect.com/science/article/pii/S1359645410001497 |
