High temperature mechanical properties of metallic and non-metallic materials were investigated by impression creep test. The stress exponent and activation energies obtained are presented. In the case of the Al-3%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. For non-metallic materials the indentation measurements resulted in for the case of a silica glass of about 1 for the value of n while for a ceramic-glass material n≈1.5 was obtained. In this latter case the activation energy was also very high (approx. 1000 kJ/mol).
|Number of pages||10|
|Journal||Mechanical and corrosion properties. Series A, Key engineering materials|
|Publication status||Published - Dec 1 1994|
|Event||Proceedings of the 6th International Symposium on Plasticity of Metals and Alloys, ISPMA 6. - Prague, Czech Repub|
Duration: Sep 5 1994 → Sep 9 1994
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