Flow stress and hot deformation activation energy of 6082 aluminium alloy influenced by initial structural state

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F19%3A10243102" target="_blank" >RIV/61989100:27360/19:10243102 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.mdpi.com/2075-4701/9/12/1248/htm" target="_blank" >https://www.mdpi.com/2075-4701/9/12/1248/htm</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/met9121248" target="_blank" >10.3390/met9121248</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Flow stress and hot deformation activation energy of 6082 aluminium alloy influenced by initial structural state

Popis výsledku v původním jazyce

Stress-strain curves of the EN AW 6082 aluminium alloy with 1.2 Si-0.51 Mg-0.75 Mn (wt.%) were determined by the uniaxial compression tests at temperatures of 450-550 oC with a strain rate of 0.5-10 sMINUS SIGN 1. The initial structure state corresponded to three processing types: as-cast structure non-homogenized or homogenized at 500 oC, and the structure after homogenization and hot extrusion. Significantly higher flow stress appeared as a result of low temperature forming of the non-homogenized material. Hot deformation activation energy Q-values varied between 99 and 122 kJ.molMINUS SIGN 1 for both homogenized materials and from 200 to 216 kJ.molMINUS SIGN 1 for the as-cast state, while the Q-values calculated from the measured steady-state stress were always higher than those calculated from the peak stress values. For the extruded state of the 6082 alloy, the physically-based model was developed to reliably predict the flow stress influenced by dynamic softening, temperature, strain rate, and true strain up to 0.6.

Název v anglickém jazyce

Flow stress and hot deformation activation energy of 6082 aluminium alloy influenced by initial structural state

Popis výsledku anglicky

Stress-strain curves of the EN AW 6082 aluminium alloy with 1.2 Si-0.51 Mg-0.75 Mn (wt.%) were determined by the uniaxial compression tests at temperatures of 450-550 oC with a strain rate of 0.5-10 sMINUS SIGN 1. The initial structure state corresponded to three processing types: as-cast structure non-homogenized or homogenized at 500 oC, and the structure after homogenization and hot extrusion. Significantly higher flow stress appeared as a result of low temperature forming of the non-homogenized material. Hot deformation activation energy Q-values varied between 99 and 122 kJ.molMINUS SIGN 1 for both homogenized materials and from 200 to 216 kJ.molMINUS SIGN 1 for the as-cast state, while the Q-values calculated from the measured steady-state stress were always higher than those calculated from the peak stress values. For the extruded state of the 6082 alloy, the physically-based model was developed to reliably predict the flow stress influenced by dynamic softening, temperature, strain rate, and true strain up to 0.6.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/ED2.1.00%2F19.0387" target="_blank" >ED2.1.00/19.0387: Rozvoj výzkumně vývojové základny RMTVC</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Metals

ISSN

2075-4701

e-ISSN

—

Svazek periodika

9

Číslo periodika v rámci svazku

12

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

15

Strana od-do

—

Kód UT WoS článku

000506637800009

EID výsledku v databázi Scopus

2-s2.0-85075427275