Interpretation of hardness measurements applied for the determination of the strain rate sensitivity

P. Tasnadi, A. Juhasz, N. Q. Chinh, I. Kovacz

Research output: Contribution to journalConference article

Abstract

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.

Original languageEnglish
Pages (from-to)169-176
Number of pages8
JournalMechanical and corrosion properties. Series A, Key engineering materials
Volume97-98
Publication statusPublished - Dec 1 1994
EventProceedings of the 6th International Symposium on Plasticity of Metals and Alloys, ISPMA 6. - Prague, Czech Repub
Duration: Sep 5 1994Sep 9 1994

ASJC Scopus subject areas

  • Engineering(all)

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