caa a22 4500 388019883 CHVBK 20180307124921.0 cr unu---uuuuu 161130e199804 xx s 000 0 eng 10.1557/JMR.1998.0148 doi S0884291400043855 pii (NATIONALLICENCE)cambridge-10.1557/JMR.1998.0148 Relationships between acoustic emission signals and physical phenomena during indentation [Elektronische Daten] A commercial piezoelectric acoustic emission transducer has been used in conjunction with nanoindentation techniques to study the relationship between acoustic emission signals and discrete physical events to identify the type and strength of an event. Indentations into tungsten and iron single crystals have been used to study dislocation generation and passive film failure. In addition, indentations made into a thin nitride film on sapphire have been used to cause film delaminations. Parameters such as signal rise time and frequency for a piezoelectric sensor are related to sample geometry, and not to the type of event which caused the acoustic emission signal. As a possible calibration for acoustic emission sensors, the most meaningful parameter is the acoustic emission energy, which has been shown to scale with the elastic energy released during the event. The measured values of elastic energy released correspond very closely to those calculated using Hertzian contact mechanics. Copyright © Materials Research Society 1998 Bahr D. F. Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455 Gerberich W. W. Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455 Journal of Materials Research Cambridge University Press 13/4(1998-04), 1065-1074 0884-2914 13:4<1065 1998 13 JMR https://doi.org/10.1557/JMR.1998.0148 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1557/JMR.1998.0148 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Bahr D. F. Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455 NATIONALLICENCE 700 1- Gerberich W. W. Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455 NATIONALLICENCE 773 0- Journal of Materials Research Cambridge University Press 13/4(1998-04), 1065-1074 0884-2914 13:4<1065 1998 13 JMR CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge