Mechanism of nanostructure formation in ball-milled Cu and Cu-3wt% Zn studied by X-ray diffraction line profile analysis

Autor(en)

M. Samadi Khoshkhoo, S. Scudino, J. Bednarcik, A. Kauffmann, H. Bahmanpour, J. Freudenberger, R. Scattergood, M. J. Zehetbauer, C. C. Koch, J. Eckert

Abstrakt

The mechanism of nanostructure formation during cryogenic and

room-temperature milling of Cu and Cu–3wt%Zn was investigated using

X-ray diffraction line profile analysis. For that, the whole powder

pattern modeling approach (WPPM) was used to analyze the evolution of

microstructural features including coherently scattering domain size,

dislocation density, and density of planar faults. It was found that for

all sets of experiments, structural decomposition is the dominant

mechanism of nanostructure formation during cryomilling. During

subsequent RT-milling, grain refinement still occurs by structural

decomposition for pure copper. On the other hand, discontinuous dynamic

recrystallization is responsible for nanostructure formation during

RT-milling of Cu–3wt%Zn. This is attributed to lower stacking-fault

energy of Cu–3wt%Zn compared to pure copper. Finally, room temperature

milling reveals the occurrence of a detwinning phenomenon.

Organisation(en)

Physik Nanostrukturierter Materialien

Externe Organisation(en)

Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden, Technische Universität Dresden, North Carolina State University, Deutsches Elektronen-Synchrotron DESY, University of California, Davis, Technische Universität Bergakademie Freiberg

Journal

Journal of Alloys and Compounds

Band

588

Seiten

138-143

Anzahl der Seiten

6

ISSN

0925-8388

DOI

https://doi.org/10.1016/j.jallcom.2013.10.252

Publikationsdatum

03-2014

Peer-reviewed

Ja

ÖFOS 2012

103018 Materialphysik

Schlagwörter

ASJC Scopus Sachgebiete

Mechanics of Materials, Mechanical Engineering, Metals and Alloys, Materials Chemistry

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/d978fe14-cba0-4b4f-be1a-7bc9f08997df