caa a22 4500 388019891 CHVBK 20180307124921.0 cr unu---uuuuu 161130e199804 xx s 000 0 eng 10.1557/JMR.1998.0146 doi S0884291400043831 pii (NATIONALLICENCE)cambridge-10.1557/JMR.1998.0146 Influences of pileup on the measurement of mechanical properties by load and depth sensing indentation techniques [Elektronische Daten] Finite element simulation of conical indentation of a wide variety of elastic-plastic materials has been used to investigate the influences of pileup on the accuracy with which hardness and elastic modulus can be measured by load and depth-sensing indentation techniques. The key parameter in the investigation is the contact area, which can be determined from the finite element results either by applying standard analysis procedures to the simulated indentation load-displacement data, as would be done in an experiment, or more directly, by examination of the contact profiles in the finite element mesh. Depending on the pileup behavior of the material, these two areas may be very different. When pileup is large, the areas deduced from analyses of the load-displacement curves underestimate the true contact areas by as much as 60%. This, in turn, leads to overestimations of the hardness and elastic modulus. The conditions under which the errors are significant are identified, and it is shown how parameters measured from the indentation load-displacement data can be used to identify when pileup is an important factor. Copyright © Materials Research Society 1998 Bolshakov A. Department of Materials Science, Rice University, 6100 Main Street, Houston, Texas 77005-1892 Pharr G. M. Department of Materials Science, Rice University, 6100 Main Street, Houston, Texas 77005-1892 Journal of Materials Research Cambridge University Press 13/4(1998-04), 1049-1058 0884-2914 13:4<1049 1998 13 JMR https://doi.org/10.1557/JMR.1998.0146 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1557/JMR.1998.0146 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Bolshakov A. Department of Materials Science, Rice University, 6100 Main Street, Houston, Texas 77005-1892 NATIONALLICENCE 700 1- Pharr G. M. Department of Materials Science, Rice University, 6100 Main Street, Houston, Texas 77005-1892 NATIONALLICENCE 773 0- Journal of Materials Research Cambridge University Press 13/4(1998-04), 1049-1058 0884-2914 13:4<1049 1998 13 JMR CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge