Precipitation in cold-rolled Al-Sc-Zr and Al-Mn-Sc-Zr alloys prepared by powder metallurgy

Handle URI:
http://hdl.handle.net/10754/563123
Title:
Precipitation in cold-rolled Al-Sc-Zr and Al-Mn-Sc-Zr alloys prepared by powder metallurgy
Authors:
Vlach, Martin; Stulíková, Ivana; Smola, Bohumil; Kekule, Tomáš; Kudrnová, Hana; Daniš, Stanislav; Gemma, Ryota; Očenášek, Vladivoj; Málek, Jaroslav; Tanprayoon, Dhritti; Neubert, Volkmar
Abstract:
The effects of cold-rolling on thermal, mechanical and electrical properties, microstructure and recrystallization behaviour of the AlScZr and AlMnScZr alloys prepared by powder metallurgy were studied. The powder was produced by atomising in argon with 1% oxygen and then consolidated by hot extrusion at 350 C. The electrical resistometry and microhardness together with differential scanning calorimetry measurements were compared with microstructure development observed by transmission and scanning electron microscopy, X-ray diffraction and electron backscatter diffraction. Fine (sub)grain structure developed and fine coherent Al3Sc and/or Al3(Sc,Zr) particles precipitated during extrusion at 350 C in the alloys studied. Additional precipitation of the Al3Sc and/or Al3(Sc,Zr) particles and/or their coarsening was slightly facilitated by the previous cold rolling. The presence of Sc,Zr-containing particles has a significant antirecrystallization effect that prevents recrystallization at temperatures minimally up to 420 C. The precipitation of the Al6Mn- and/or Al 6(Mn,Fe) particles of a size ~ 1.0 μm at subgrain boundaries has also an essential antirecrystallization effect and totally suppresses recrystallization during 32 h long annealing at 550 C. The texture development of the alloys seems to be affected by high solid solution strengthening by Mn. The precipitation of the Mn-containing alloy is highly enhanced by a cold rolling. The apparent activation energy of the Al3Sc particles formation and/or coarsening and that of the Al6Mn and/or Al 6(Mn,Fe) particle precipitation in the powder and in the compacted alloys were determined. The cold deformation has no effect on the apparent activation energy values of the Al3Sc-phase and the Al 6Mn-phase precipitation. © 2013 Elsevier Inc.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; Core Labs
Publisher:
Elsevier BV
Journal:
Materials Characterization
Issue Date:
Dec-2013
DOI:
10.1016/j.matchar.2013.09.010
Type:
Article
ISSN:
10445803
Sponsors:
The financial support by The Czech Science Foundation (GACR), post-doc project no. GP P107/11/P201, is gratefully acknowledged. The authors are also grateful to Prof. Jaromir Plagek and Mgr. Tamara Cuckova for their help.
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorVlach, Martinen
dc.contributor.authorStulíková, Ivanaen
dc.contributor.authorSmola, Bohumilen
dc.contributor.authorKekule, Tomášen
dc.contributor.authorKudrnová, Hanaen
dc.contributor.authorDaniš, Stanislaven
dc.contributor.authorGemma, Ryotaen
dc.contributor.authorOčenášek, Vladivojen
dc.contributor.authorMálek, Jaroslaven
dc.contributor.authorTanprayoon, Dhrittien
dc.contributor.authorNeubert, Volkmaren
dc.date.accessioned2015-08-03T11:36:18Zen
dc.date.available2015-08-03T11:36:18Zen
dc.date.issued2013-12en
dc.identifier.issn10445803en
dc.identifier.doi10.1016/j.matchar.2013.09.010en
dc.identifier.urihttp://hdl.handle.net/10754/563123en
dc.description.abstractThe effects of cold-rolling on thermal, mechanical and electrical properties, microstructure and recrystallization behaviour of the AlScZr and AlMnScZr alloys prepared by powder metallurgy were studied. The powder was produced by atomising in argon with 1% oxygen and then consolidated by hot extrusion at 350 C. The electrical resistometry and microhardness together with differential scanning calorimetry measurements were compared with microstructure development observed by transmission and scanning electron microscopy, X-ray diffraction and electron backscatter diffraction. Fine (sub)grain structure developed and fine coherent Al3Sc and/or Al3(Sc,Zr) particles precipitated during extrusion at 350 C in the alloys studied. Additional precipitation of the Al3Sc and/or Al3(Sc,Zr) particles and/or their coarsening was slightly facilitated by the previous cold rolling. The presence of Sc,Zr-containing particles has a significant antirecrystallization effect that prevents recrystallization at temperatures minimally up to 420 C. The precipitation of the Al6Mn- and/or Al 6(Mn,Fe) particles of a size ~ 1.0 μm at subgrain boundaries has also an essential antirecrystallization effect and totally suppresses recrystallization during 32 h long annealing at 550 C. The texture development of the alloys seems to be affected by high solid solution strengthening by Mn. The precipitation of the Mn-containing alloy is highly enhanced by a cold rolling. The apparent activation energy of the Al3Sc particles formation and/or coarsening and that of the Al6Mn and/or Al 6(Mn,Fe) particle precipitation in the powder and in the compacted alloys were determined. The cold deformation has no effect on the apparent activation energy values of the Al3Sc-phase and the Al 6Mn-phase precipitation. © 2013 Elsevier Inc.en
dc.description.sponsorshipThe financial support by The Czech Science Foundation (GACR), post-doc project no. GP P107/11/P201, is gratefully acknowledged. The authors are also grateful to Prof. Jaromir Plagek and Mgr. Tamara Cuckova for their help.en
dc.publisherElsevier BVen
dc.subjectAl 6Mn precipitatesen
dc.subjectAl3(Sc Zr) phaseen
dc.subjectDSCen
dc.subjectPhase transformationen
dc.subjectPowder metallurgyen
dc.subjectRecrystallizationen
dc.titlePrecipitation in cold-rolled Al-Sc-Zr and Al-Mn-Sc-Zr alloys prepared by powder metallurgyen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentCore Labsen
dc.identifier.journalMaterials Characterizationen
dc.contributor.institutionCharles University in Prague, Faculty of Mathematics and Physics, Ke Karlovu 3, CZ-121 16 Prague, Czech Republicen
dc.contributor.institutionSVÚM A.s., Podnikatelská 565, CZ-190 11 Prague, Czech Republicen
dc.contributor.institutionCzech Technical University in Prague, Faculty of Mechanical Engineering, CZ-120 00 Prague, Czech Republicen
dc.contributor.institutionInstitut für Materialprüfung und Werkstofftechnik, Freiberger Strasse 1, D-38678 Clausthal-Zellerfeld, Germanyen
kaust.authorGemma, Ryotaen
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