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Nanoindentation responses of black anodic coating on additively manufactured Al–10Si–Mg alloy.
- Source :
-
Ceramics International . Dec2022:Part B, Vol. 48 Issue 23, p35883-35895. 13p. - Publication Year :
- 2022
-
Abstract
- The present work reveals the variation of nanomechanical properties (nanohardness-H and modulus-E) of black anodic coating on additively manufactured Al–10Si–Mg alloy. The plan-section of the coating has mud-crack-like morphology with various nano/micro-pores, micro-channels, and irregularities. In contrast, the cross-section possesses a compact morphology with minimum surface/sub-surface defects like micro-cracks or irregularities. The H and E are derived from nanoindentation experiments using Berkovich tip at loads 10–50 mN. The nanomechanical properties are higher across the cross-section than the plan section of the coating, attributing to the difference in morphology between the plan- and the cross-sections. Due to characteristic porosities, defects, and nano/micro-cracks in the anodic coating, Weibull statistical analysis has been employed to rationalize the scatter in nanoindentation-based data. For both plan and cross-sections, the H and E values decrease as the indentation load increases from 10 to 50 mN, confirming the indentation size effect (ISE). The well-established Meyer's law, Hays–Kendall approach, elastic recovery model, proportional specimen resistance (PSR) model and the modified PSR model have been used to thoroughly analyze the ISE characteristics. [ABSTRACT FROM AUTHOR]
- Subjects :
- *NANOINDENTATION
*SURFACE coatings
*ALLOYS
*MICROCRACKS
Subjects
Details
- Language :
- English
- ISSN :
- 02728842
- Volume :
- 48
- Issue :
- 23
- Database :
- Academic Search Index
- Journal :
- Ceramics International
- Publication Type :
- Academic Journal
- Accession number :
- 160315772
- Full Text :
- https://doi.org/10.1016/j.ceramint.2022.09.110