Microstructural evolution during ageing of Al-Cu-Li-x alloys
Identifieur interne : 004059 ( Main/Exploration ); précédent : 004058; suivant : 004060Microstructural evolution during ageing of Al-Cu-Li-x alloys
Auteurs : Vicente Araullo-Peters [Australie] ; Baptiste Gault [Royaume-Uni] ; Frederic De Geuser [France] ; Alexis Deschamps [France] ; Julie M. Cairney [Australie]Source :
- Acta materialia [ 1359-6454 ] ; 2014.
Descripteurs français
- Pascal (Inist)
English descriptors
- KwdEn :
Abstract
In this study, atom probe tomography was used to investigate the microstructure of the alloy AA2198 (Al-1.35 Cu-3.55 Li-0.29 Mg-0.08 Ag) over a range of ageing conditions to examine the evolution of phases in the alloy, in particular aiming to reveal the nucleation mechanism of the strengthening T1 phase. T1 precursor phases were observed from early ageing, most of which were connected to dislocations enriched with Mg and Ag. This Mg solute segregation on the dislocations was subsequently observed to develop into S-like phases. Ag and Mg segregation to T1 interfaces was systematically observed when the plates were oriented perpendicular to the probing direction. The matrix solute content was followed during the course of T1 precipitation. It was found that the evolution of Cu, Li, Mg and Ag was similar, giving additional evidence for their co-precipitation.
Affiliations:
- Australie, France, Royaume-Uni
- Angleterre, Auvergne-Rhône-Alpes, Nouvelle-Galles du Sud, Oxfordshire, Rhône-Alpes
- Grenoble, Oxford, Saint-Martin-d'Hères, Sydney
- Université d'Oxford, Université de Sydney
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Cairney</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>School of Aerospace Mechanical and Mechatronic Engineering, University of Sydney</s1><s2>Sydney</s2><s3>AUS</s3><sZ>1 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Australie</country><placeName><settlement type="city">Sydney</settlement><region type="état">Nouvelle-Galles du Sud</region><settlement type="city">Sydney</settlement></placeName><orgName type="university">Université de Sydney</orgName></affiliation><affiliation wicri:level="4"><inist:fA14 i1="02"><s1>Australian Centre for Microscopy and Microanalysis, University of Sydney</s1><s2>Sydney</s2><s3>AUS</s3><sZ>1 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Australie</country><placeName><settlement type="city">Sydney</settlement><region type="état">Nouvelle-Galles du Sud</region><settlement type="city">Sydney</settlement></placeName><orgName type="university">Université de Sydney</orgName></affiliation></author></analytic><series><title level="j" type="main">Acta materialia</title><title level="j" type="abbreviated">Acta mater.</title><idno type="ISSN">1359-6454</idno><imprint><date when="2014">2014</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Acta materialia</title><title level="j" type="abbreviated">Acta mater.</title><idno type="ISSN">1359-6454</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Ageing</term><term>Aluminium base alloys</term><term>Atom probe</term><term>Copper alloy</term><term>Microstructure</term><term>Precipitation</term><term>Precipitation hardening</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Microstructure</term><term>Vieillissement</term><term>Cuivre alliage</term><term>Alliage base aluminium</term><term>Sonde atomique</term><term>Durcissement précipitation</term><term>Précipitation</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">In this study, atom probe tomography was used to investigate the microstructure of the alloy AA2198 (Al-1.35 Cu-3.55 Li-0.29 Mg-0.08 Ag) over a range of ageing conditions to examine the evolution of phases in the alloy, in particular aiming to reveal the nucleation mechanism of the strengthening T<sub>1</sub> phase. T<sub>1</sub> precursor phases were observed from early ageing, most of which were connected to dislocations enriched with Mg and Ag. This Mg solute segregation on the dislocations was subsequently observed to develop into S-like phases. Ag and Mg segregation to T<sub>1</sub> interfaces was systematically observed when the plates were oriented perpendicular to the probing direction. The matrix solute content was followed during the course of T<sub>1</sub> precipitation. It was found that the evolution of Cu, Li, Mg and Ag was similar, giving additional evidence for their co-precipitation.</div></front></TEI><affiliations><list><country><li>Australie</li><li>France</li><li>Royaume-Uni</li></country><region><li>Angleterre</li><li>Auvergne-Rhône-Alpes</li><li>Nouvelle-Galles du Sud</li><li>Oxfordshire</li><li>Rhône-Alpes</li></region><settlement><li>Grenoble</li><li>Oxford</li><li>Saint-Martin-d'Hères</li><li>Sydney</li></settlement><orgName><li>Université d'Oxford</li><li>Université de Sydney</li></orgName></list><tree><country name="Australie"><region name="Nouvelle-Galles du Sud"><name sortKey="Araullo Peters, Vicente" sort="Araullo Peters, Vicente" uniqKey="Araullo Peters V" first="Vicente" last="Araullo-Peters">Vicente Araullo-Peters</name></region><name sortKey="Araullo Peters, Vicente" sort="Araullo Peters, Vicente" uniqKey="Araullo Peters V" first="Vicente" last="Araullo-Peters">Vicente Araullo-Peters</name><name sortKey="Cairney, Julie M" sort="Cairney, Julie M" uniqKey="Cairney J" first="Julie M." last="Cairney">Julie M. Cairney</name><name sortKey="Cairney, Julie M" sort="Cairney, Julie M" uniqKey="Cairney J" first="Julie M." last="Cairney">Julie M. Cairney</name></country><country name="Royaume-Uni"><region name="Angleterre"><name sortKey="Gault, Baptiste" sort="Gault, Baptiste" uniqKey="Gault B" first="Baptiste" last="Gault">Baptiste Gault</name></region></country><country name="France"><region name="Auvergne-Rhône-Alpes"><name sortKey="De Geuser, Frederic" sort="De Geuser, Frederic" uniqKey="De Geuser F" first="Frederic" last="De Geuser">Frederic De Geuser</name></region><name sortKey="Deschamps, Alexis" sort="Deschamps, Alexis" uniqKey="Deschamps A" first="Alexis" last="Deschamps">Alexis Deschamps</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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