Investigation of the High Temperature Plasticity of Materials by Indentation Measurements

High-temperature mechanical properties of metallic and nonmetallic materials were investigated by impression creep test. The stress exponent and activation energies obtained are presented. In the case of the Al-3 pct Mg solid solution alloy it was shown that the stress exponent and the activation en...

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Bibliographic Details
Published in:Key engineering materials 1994-01, Vol.97-98, p.159-168
Main Authors: Nguyen, Quang Chinh, Juhász, András, Kovács, I., Szép-Kiss, E., Szommer, Péter, Tasnádi, P.
Format: Article
Language:English
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Summary:High-temperature mechanical properties of metallic and nonmetallic materials were investigated by impression creep test. The stress exponent and activation energies obtained are presented. In the case of the Al-3 pct Mg solid solution alloy it was shown that the stress exponent and the activation energy depends on the applied stress. They were found to be 3 and 148 kJ/mol in the lower stress regions and 4.6 and 129 kJ/mol in the higher stress regions, respectively. Indentation measurements for nonmetallic materials are reported. For the case of a silica glass n of about 1 was obtained, while for a ceramic-glass material n of about 1.5 was obtained. In this latter case the activation energy was also very high. (Author)
ISSN:1013-9826
1662-9795
1662-9795
DOI:10.4028/www.scientific.net/KEM.97-98.159