In-situ study of phase transformations during homogenization of 6005 and 6082 Al alloys

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F17%3A10371395" target="_blank" >RIV/00216208:11320/17:10371395 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.jallcom.2017.07.149" target="_blank" >http://dx.doi.org/10.1016/j.jallcom.2017.07.149</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jallcom.2017.07.149" target="_blank" >10.1016/j.jallcom.2017.07.149</a>

Jazyk výsledku

angličtina

Název v původním jazyce

In-situ study of phase transformations during homogenization of 6005 and 6082 Al alloys

Popis výsledku v původním jazyce

Intermetallic beta-Al5FeSi phase and coarse Mg2Si particles have negative effects on extrudability and workability of 6xxx Al alloy billets. To achieve extruded products with a high surface quality as-cast billets are therefore heat-treated before extrusion. During heat treatment the undesired intermetallic particles, i.e., beta-AlFeSi platelets, are transformed to a rounded alpha-Al(FeMn) Si intermetallic phase. This transformation was studied in-situ by TEM for 6005 and 6082 Al alloys. It was observed that the Mg2Si particles precipitate in the Al matrix at about 250 degrees C; this precipitation also occurred at the edge and faces of beta intermetallic particles, and the Mg2Si particles were the preferred sites for alpha-Al(FeMn) Si particle nucleation. The transformation proceeded faster and at lower temperatures, 350-450 degrees C, than what has been reported earlier for homogenization studies of bulk samples and industrial billets. This could be associated with the thin characteristic of used samples in TEM giving contribution from fast surface diffusion, but it was also concluded that the phase boundary layer diffusion was important for the understanding of how the transformations proceed.

Název v anglickém jazyce

In-situ study of phase transformations during homogenization of 6005 and 6082 Al alloys

Popis výsledku anglicky

Intermetallic beta-Al5FeSi phase and coarse Mg2Si particles have negative effects on extrudability and workability of 6xxx Al alloy billets. To achieve extruded products with a high surface quality as-cast billets are therefore heat-treated before extrusion. During heat treatment the undesired intermetallic particles, i.e., beta-AlFeSi platelets, are transformed to a rounded alpha-Al(FeMn) Si intermetallic phase. This transformation was studied in-situ by TEM for 6005 and 6082 Al alloys. It was observed that the Mg2Si particles precipitate in the Al matrix at about 250 degrees C; this precipitation also occurred at the edge and faces of beta intermetallic particles, and the Mg2Si particles were the preferred sites for alpha-Al(FeMn) Si particle nucleation. The transformation proceeded faster and at lower temperatures, 350-450 degrees C, than what has been reported earlier for homogenization studies of bulk samples and industrial billets. This could be associated with the thin characteristic of used samples in TEM giving contribution from fast surface diffusion, but it was also concluded that the phase boundary layer diffusion was important for the understanding of how the transformations proceed.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Journal of Alloys and Compounds

ISSN

0925-8388

e-ISSN

—

Svazek periodika

725

Číslo periodika v rámci svazku

listopad

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

6

Strana od-do

504-509

Kód UT WoS článku

000412332900058

EID výsledku v databázi Scopus

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