Modeling of the work hardening in magnesium alloy sheets

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F16%3A10322749" target="_blank" >RIV/00216208:11320/16:10322749 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.ijplas.2015.08.001" target="_blank" >http://dx.doi.org/10.1016/j.ijplas.2015.08.001</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ijplas.2015.08.001" target="_blank" >10.1016/j.ijplas.2015.08.001</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Modeling of the work hardening in magnesium alloy sheets

Popis výsledku v původním jazyce

The deformation behavior of rolled Mg-Al-Zn and Mg-Zn-RE (rare earth) sheets after annealing was investigated in tension. The tensile axis was oriented in either the rolling direction (RD) or the transverse direction (TD). The deformation tests of the sheets were accompanied by in situ measurements of the acoustic emission (AE); AE signal analysis correlates the microstructure and the stress-strain curves to possible deformation mechanisms. X-ray diffraction is applied to determine information about the deformation textures both prior to and after the tests. Both texture analysis and AE for different loading and texture conditions suggest that the prismatic slip is dominant in larger deformation stages. A strain hardening model, based on the generalized Kocks-Mecking approach, is fitted to the observed deformation behavior, including the mechanical anisotropy of the Mg alloy sheets. The model enables the determination of the work hardening coefficient, considering the glide obstacles of both dislocation and non-dislocation origin; the distribution of grain orientations is also considered. The work hardening analysis is applied to the late stage of deformation, where twins are included only as non-dislocation barriers for mobile dislocations.

Název v anglickém jazyce

Modeling of the work hardening in magnesium alloy sheets

Popis výsledku anglicky

The deformation behavior of rolled Mg-Al-Zn and Mg-Zn-RE (rare earth) sheets after annealing was investigated in tension. The tensile axis was oriented in either the rolling direction (RD) or the transverse direction (TD). The deformation tests of the sheets were accompanied by in situ measurements of the acoustic emission (AE); AE signal analysis correlates the microstructure and the stress-strain curves to possible deformation mechanisms. X-ray diffraction is applied to determine information about the deformation textures both prior to and after the tests. Both texture analysis and AE for different loading and texture conditions suggest that the prismatic slip is dominant in larger deformation stages. A strain hardening model, based on the generalized Kocks-Mecking approach, is fitted to the observed deformation behavior, including the mechanical anisotropy of the Mg alloy sheets. The model enables the determination of the work hardening coefficient, considering the glide obstacles of both dislocation and non-dislocation origin; the distribution of grain orientations is also considered. The work hardening analysis is applied to the late stage of deformation, where twins are included only as non-dislocation barriers for mobile dislocations.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

—

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

International Journal of Plasticity

ISSN

0749-6419

e-ISSN

—

Svazek periodika

76

Číslo periodika v rámci svazku

leden

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

20

Strana od-do

166-185

Kód UT WoS článku

000366439800008

EID výsledku v databázi Scopus

2-s2.0-84940496870