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