Results 251 to 260 of about 19,950 (296)

Depth-sensing indentation measurements with Vickers and Berkovich indenters

Journal of Materials Research, 1998
Depth-sensing indentation measurements are performed with two different Vickers indenters and one Berkovich indenter. The sample materials were mirror polished Ag, Al, Au, Ni, and Ti samples. From the load-indentation depth data, the conventional hardness plots as well as the first derivative are calculated.
B. Rother, A. Steiner, D. A. Dietrich, H. A. Jehn, J. Haupt, W. Gissler   +5 more
openaire   +1 more source

Depth-sensing instrumented indentation with dual sharp indenters

Acta Materialia, 2003
A methodology for interpreting instrumented sharp indentation with dual sharp indenters with different tip apex angles is presented by recourse to computational modeling within the context of finite element analysis. The forward problem predicts an indentation response from a given set of elasto-plastic properties, whereas the reverse analysis seeks to
N. Chollacoop, M. Dao, S. Suresh
openaire   +1 more source

Indentation load relaxation experiments with indentation depth in the submicron range

Journal of Materials Research, 1990
Indentation load relaxation (ILR) experiments with indentation depths in the submicron range are described. Under appropriate conditions, the ILR data are found to yield flow curves of the same shape as those based on conventional load relaxation data.
W. R. LaFontaine, B. Yost, R. D. Black, C-Y. Li   +3 more
openaire   +1 more source

Determination of indenter tip geometry and indentation contact area for depth-sensing indentation experiments

Journal of Materials Research, 1998
The phenomena of pile-up and sink-in associated with nanoindentation have been found to have large effects on the measurements of the indentation modulus and hardness of copper. Pile-up (or sink-in) leads to contact areas that are greater than (or less than) the cross-sectional area of the indenter at a given depth.
K. W. McElhaney, J. J. Vlassak, W. D. Nix   +2 more
openaire   +1 more source

Critical relative indentation depth in carbon based thin films

Progress in Natural Science: Materials International, 2014
The thin film hardness estimation by nanoindentation is influenced by substrate beyond a critical relative indentation depth (CRID). In this study we developed a methodology to identify the CRID in amorphous carbon film.
R Bartali, Alessandro Vaccari, V Micheli   +2 more
exaly   +2 more sources

Depth-sensing indentation of nanomaterials and nanostructures

Materials Characterization, 2013
Due to its capacity for applying ultralow loads and detecting nanometer-scale deflections, nanoindentation has been used to investigate the mechanical behavior of various material configurations at the micro- and nano-scales. The emphasis of the article is on the nanoscale deformation of nanoparticles, micro/nanopillars, microbeams, micro/nanofibers ...
Manuel L.B. Palacio, Bharat Bhushan
openaire   +1 more source

Depth-sensing indentation at macroscopic dimensions

Journal of Materials Research, 2002
A macroscopic-scale depth-sensing indentation apparatus with the ability to be mounted on an inverted microscope for in situ observation of contact events was calibrated using the Oliver and Pharr [J. Mater. Res. 7, 1564 (1992)] procedure with a two-parameter area function.
Jeremy Thurn, Dylan J. Morris, Robert F. Cook   +2 more
openaire   +1 more source

The Indentation Load-depth Curve of Ceramics

Journal of Materials Research, 1999
The pyramidal indentation-induced surface deformation of brittle ceramics is examined on the basis of extensive test results for indentation load (P)-depth (h) curves during loading/unloading cycle. A mechanically stiff test system is essential for obtaining P-h curves acceptable and reliable for subsequent analyses.
M. Sakai, S. Shimizu, T. Ishikawa
openaire   +1 more source

Simplified Area Function for Sharp Indenter Tips in Depth-sensing Indentation

Journal of Materials Research, 2002
A two-parameter “area function” characterizing the depth-dependent projected area of an indenter was introduced and applied to a Berkovich tip. The two parameters have physical meaning, corresponding to the effective tip radius and effective cone angle. The indenter tip was calibrated on a commercial load-controlled Nano Indentert® XP (MTS Systems Corp.
Jeremy Thurn, Robert F. Cook
openaire   +1 more source

Measurement of residual stress by load and depth sensing indentation with spherical indenters

Journal of Materials Research, 2001
A new experimental technique is presented for making measurements of biaxial residual stress using load and depth sensing indentation (nanoindentation). The technique is based on spherical indentation, which, in certain deformation regimes, can be much more sensitive to residual stress than indentation with sharp pyramidal indenters like the Berkovich.
J. G. Swadener, B. Taljat, G.M. Pharr
openaire   +1 more source