One of the most important characteristics of the deformation process is the strain rate sensitivity defined by m = (∂ln σ÷∂ln ε)ε. There are various proposals and experimental evidence that it can be evaluated from the hardness measurements. In the present paper a short discussion for the physical background is given. The evaluation of the strain rate sensitivity from the hardness measurement is interpreted by dimensional analysis and on the basis of a simple model for the stress field developing under the indenter. Using this model the indentation length - time function can be determined and it is shown that it gives us a new possibility for the determination of the activation energy of the process.
|Number of pages||8|
|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
ASJC Scopus subject areas