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Kinetic, volumetric and structural effects induced by liquid Ga penetration into ultrafine grained Al

Autor(en)
Mehrnoosh Naderi, Martin Peterlechner, Erhard Schafler, Sergiy V. Divinski, Gerhard Wilde
Abstrakt

Kinetic, volumetric and structural effects induced by penetration of liquid Ga in ultrafine grained (UFG) Al produced by severe plastic deformation using high-pressure torsion were studied by isothermal dilatometric measurements, electron microscopy, atomic force microscopy and X-ray diffraction. Severe plastic deformation changed the distribution of impurities and their segregation was revealed by transmission electron microscopy. Two-stage length changes of UFG Al were observed which are explained by counteracting effects of expansion due to grain boundary segregation of Ga and contraction due to precipitation and recrystallization. After applying Ga, the kinetics of the liquid Ga penetration in UFG Al is studied in-situ in the electron microscope by the "first appearance" method and the time scales are in agreement with those inducing the volumetric changes.

Organisation(en)
Physik Nanostrukturierter Materialien
Externe Organisation(en)
Universität Münster
Journal
Acta Materialia
Band
99
Seiten
196-205
Anzahl der Seiten
10
ISSN
1359-6454
DOI
https://doi.org/10.1016/j.actamat.2015.07.061
Publikationsdatum
10-2015
Peer-reviewed
Ja
ÖFOS 2012
103018 Materialphysik, 211104 Metallurgie
Schlagwörter
ASJC Scopus Sachgebiete
Electronic, Optical and Magnetic Materials, Ceramics and Composites, Metals and Alloys, Polymers and Plastics
Link zum Portal
https://ucrisportal.univie.ac.at/de/publications/14496c0a-f6c7-4103-ab2f-199d1f9fdde4