Title: Nanoindentation near the edge
Author: Jakes, J.E.; Frihart, C.R.; Beecher, J.F.; Moon, R.J.; Resto, P.J.; Melgarejo, Z.H.; Saurez, O.M.; Baumgart, H.; Elmustafa, A.A.; Stone, D.S.;
Source: Journal of materials research. Volume 24, Number. 3 (Mar. 2009): pp. 1016-1031.
Publication Series: Scientific Journal (JRNL)
Description: Whenever a nanoindent is placed near an edge, such as the free edge of the specimen or heterophase interface intersecting the surface, the elastic discontinuity associated with the edge produces artifacts in the load-depth data. Unless properly handled in the data analysis, the artifacts can produce spurious results that obscure any real trends in properties as functions of position. Previously, we showed that the artifacts can be understood in terms of a structural compliance, Cs, which is independent of the size of the indent. In the present work, the utility of the SYS (Stone, Yoder, Sproul) correlation is demonstrated in its ability to remove the artifacts caused by Cs. We investigate properties: (i) near the surface of an extruded polymethyl methacrylate rod tested in cross section, (ii) of compound corner middle lamellae of loblolly pine (Pinus taeda) surrounded by relatively stiff wood cell walls, (iii) of wood cell walls embedded in a polypropylene matrix with some poorly bonded wood-matrix interfaces, (iv) of AlB2 particles embedded in an aluminum matrix, and (v) of silicon-on-insulator thin film on substrate near the free edge of the specimen.
Keywords: Hardness, aluminum, polymethyl methacrylate, wood, mechanical properties, loblolly pine, plant cell walls, silicon, composite materials, polypropylene, nanostructured materials, measurement, nanotechnology, microstructure, elasticity, wood-plastic composites, testing, modulus of elasticity, surface properties, wood-plastic materials, nanoindentation
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
XML: View XML
Jakes, J.E.; Frihart, C.R.; Beecher, J.F.; Moon, R.J.; Resto, P.J.; Melgarejo, Z.H.; Saurez, O.M.; Baumgart, H.; Elmustafa, A.A.; Stone, D.S. 2009. Nanoindentation near the edge. Journal of Materials Research. Volume 24, Number 3: 1016-1031.
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility