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

•Nanostructured powders of Cu and Cu–3wt%Zn were produced using ball milling.•During cryomilling, nanostructure was formed by structural decomposition.•Dynamic recrystallization happened in room–temperature milling of Cu–3wt%Zn.•Structural decomposition took place during room–temperature milling of...

Full description

Saved in:
Bibliographic Details
Published in:Journal of alloys and compounds 2014-03, Vol.588, p.138-143
Main Authors: Khoshkhoo, M. Samadi, Scudino, S., Bednarcik, J., Kauffmann, A., Bahmanpour, H., Freudenberger, J., Scattergood, R., Zehetbauer, M.J., Koch, C.C., Eckert, J.
Format: Article
Language:English
Subjects:
Alloys
Applied sciences
Coherent scattering
Copper
COPPER (PURE)
Decomposition
Density
Diffraction
DISLOCATIONS
Exact sciences and technology
Formations
Mechanical alloying
Metal powders
Metals. Metallurgy
MICROSTRUCTURES
Nanostructure
Nanostructured materials
Powder metallurgy. Composite materials
Production techniques
SCATTERING
X RAY DIFFRACTION
X RAYS
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:•Nanostructured powders of Cu and Cu–3wt%Zn were produced using ball milling.•During cryomilling, nanostructure was formed by structural decomposition.•Dynamic recrystallization happened in room–temperature milling of Cu–3wt%Zn.•Structural decomposition took place during room–temperature milling of Cu. 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.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2013.10.252