Review of peak stress setting (CROSBI ID 598237)
Prilog sa skupa u zborniku | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Kliber, Jiri ; Kunčicka, Lenka ; Mamuzić, Ilija
engleski
Review of peak stress setting
Investigations of metal materials properties were always based on preforming tests, for confirmation of mechanical properties mainly tensile tests were used. However, due to complicated state of stress after neck occurrence, these cannot be used for practical application at industrial forming processes. That's why plastometric tests (torsion, press)are further utilized, their outcomes are curves of stress-strain dependence. After applications of large strains tests always result in curve with Sigma<sub>p</sub> maximum stress value corresponding to the peak strain value Etha<sub>p</sub>. Reaching of this strain value induces (dynamic) re-crystallization or start of recovery. It is mostly one single point on the stress-strain curve, which can be defined unambiguously and mathematically described depending on the basic parameters. Single curves may vary in accordance with various ways of plotting, basic parameters (temperature T, strain Etha, and the strain rate Etha''), additional conditions (chemical composition influence and history of the material - residual strain after incomplete re-crystallization or recovery), structure influence (phases portions, grain size) etc. The paper is focused on various methods of peak stress description on the basisi of Gleeble plastometer tests results and Plane Strain Compression tests.
stress-strain curve; peak stress; Gleeble plastometric test
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Podaci o prilogu
37-44.
2013.
objavljeno
Podaci o matičnoj publikaciji
METAL 2013 : Summaries of Lectures
Kliber, Jiri
Brno:
Podaci o skupu
22<sup>nd</sup> International Conference Metallurgy and Materials - METAL 2013
predavanje
15.05.2013-17.05.2013
Brno, Češka Republika