caa a22 4500 388022639 CHVBK 20180307124928.0 cr unu---uuuuu 161130e199805 xx s 000 0 eng 10.1557/JMR.1998.0185 doi S0884291400044216 pii (NATIONALLICENCE)cambridge-10.1557/JMR.1998.0185 Determination of indenter tip geometry and indentation contact area for depth-sensing indentation experiments [Elektronische Daten] 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. These effects lead to errors in the absolute measurement of mechanical properties by nanoindentation. To account for these effects, a new method of indenter tip shape calibration has been developed; it is based on measurements of contact compliance as well as direct SEM observations and measurements of the areas of large indentations. Application of this calibration technique to strain-hardened (pile-up) and annealed (sink-in) copper leads to a unique tip shape calibration for the diamond indenter itself, as well as to a material parameter, a, which characterizes the extent of pile-up or sink-in. Thus the shape of the indenter tip and nature of the material response are separated in this calibration method. Using this approach, it is possible to make accurate absolute measurements of hardness and indentation modulus by nanoindentation. Copyright © Materials Research Society 1998 McElhaney K. W. Department of Materials Science and Engineering, Stanford University, Stanford, California 94305 Vlassak J. J. Department of Materials Science and Engineering, Stanford University, Stanford, California 94305 Nix W. D. Department of Materials Science and Engineering, Stanford University, Stanford, California 94305 Journal of Materials Research Cambridge University Press 13/5(1998-05), 1300-1306 0884-2914 13:5<1300 1998 13 JMR https://doi.org/10.1557/JMR.1998.0185 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1557/JMR.1998.0185 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- McElhaney K. W. Department of Materials Science and Engineering, Stanford University, Stanford, California 94305 NATIONALLICENCE 700 1- Vlassak J. J. Department of Materials Science and Engineering, Stanford University, Stanford, California 94305 NATIONALLICENCE 700 1- Nix W. D. Department of Materials Science and Engineering, Stanford University, Stanford, California 94305 NATIONALLICENCE 773 0- Journal of Materials Research Cambridge University Press 13/5(1998-05), 1300-1306 0884-2914 13:5<1300 1998 13 JMR CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge