Early stages of solute clustering in an Al-Mg-Si alloy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F15%3A10315694" target="_blank" >RIV/00216208:11320/15:10315694 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.actamat.2015.02.019" target="_blank" >http://dx.doi.org/10.1016/j.actamat.2015.02.019</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.actamat.2015.02.019" target="_blank" >10.1016/j.actamat.2015.02.019</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Early stages of solute clustering in an Al-Mg-Si alloy

Popis výsledku v původním jazyce

The processes taking place during natural ageing (NA) of the aluminium alloy Al-0.4Mg-0.4Si (wt.%) are characterised by positron annihilation lifetime spectroscopy carried out both in situ during ageing and ex situ after cooling down samples to low temperatures (-180 degrees C to -60 degrees C) between NA steps. We find a pronounced dependence of positron lifetime on temperature, which is the signature of the presence of vacancy-free solute clusters in addition to vacancy-related defects. Such clustersare also found in as-quenched samples, indicating that clustering takes place already during quenching. The decomposition of positron lifetime spectra into various components allows us to apply the three-state trapping model and to determine the trappingrates into vacancy-related defects and solute clusters. By modelling the time dependence of positron data we are able to describe the natural ageing process as a gradual decrease of vacancy density associated with a pronounced increase o

Název v anglickém jazyce

Early stages of solute clustering in an Al-Mg-Si alloy

Popis výsledku anglicky

The processes taking place during natural ageing (NA) of the aluminium alloy Al-0.4Mg-0.4Si (wt.%) are characterised by positron annihilation lifetime spectroscopy carried out both in situ during ageing and ex situ after cooling down samples to low temperatures (-180 degrees C to -60 degrees C) between NA steps. We find a pronounced dependence of positron lifetime on temperature, which is the signature of the presence of vacancy-free solute clusters in addition to vacancy-related defects. Such clustersare also found in as-quenched samples, indicating that clustering takes place already during quenching. The decomposition of positron lifetime spectra into various components allows us to apply the three-state trapping model and to determine the trappingrates into vacancy-related defects and solute clusters. By modelling the time dependence of positron data we are able to describe the natural ageing process as a gradual decrease of vacancy density associated with a pronounced increase o

Druh

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

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

—

Projekt

<a href="/cs/project/GA13-09436S" target="_blank" >GA13-09436S: Nedestruktivní mapování prostorového rozložení defektů v silně deformovaných materiálech</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název periodika

Acta Materialia

ISSN

1359-6454

e-ISSN

—

Svazek periodika

91

Číslo periodika v rámci svazku

1 June 2015

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

355-364

Kód UT WoS článku

000354154400031

EID výsledku v databázi Scopus

2-s2.0-84937758125