Naslov
Review of peak stress setting

Autori
Kliber, Jiri ; Kunčicka, Lenka ; Mamuzić, Ilija

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
METAL 2013 : Summaries of Lectures / Kliber, Jiri - Brno, 2013, 37-44

Skup
22^nd International Conference Metallurgy and Materials - METAL 2013

Mjesto i datum
Brno, Češka Republika, 15.05.2013. - 17.05.2013

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
stress-strain curve; peak stress; Gleeble plastometric test

Sažetak
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_p maximum stress value corresponding to the peak strain value Etha_p. 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.

Izvorni jezik
Engleski

Znanstvena područja
Metalurgija

POVEZANOST RADA