Please use this identifier to cite or link to this item: doi:10.22028/D291-29256
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Title: High strength nanocrystalline Cu–Co alloys with high tensile ductility
Author(s): Bachmaier, Andrea
Rathmayr, Georg B.
Schmauch, Jörg
Schell, Norbert
Stark, Andreas
de Jonge, Niels
Pippan, Reinhard
Language: English
Title: Journal of Materials Research
Volume: 34
Issue: 1
Startpage: 58
Endpage: 68
Publisher/Platform: Cambridge University Press
Year of Publication: 2018
Publikation type: Journal Article
Abstract: A supersaturated single-phase Cu–26 at.% Co alloy was produced by high-pressure torsion deformation, leading to a nanocrystalline microstructure with a grain size smaller than 100 nm. The nonequilibrium solid solution decomposed during subsequent isothermal annealing. In situ high-energy X-ray diffraction was used to map changes linked to the separating phases, and the development of a nanoscale Cu–Co composite structure was observed. To gain further information about the relationship of the microstructure and the mechanical properties after phase separation, uniaxial tensile tests were conducted on as-deformed and isothermally annealed samples. Based on the in situ diffraction data, different isothermal annealing temperatures were chosen. Miniaturized tensile specimens with a round cross section were tested, and an image-based data evaluation method enabled the evaluation of true stress–strain curves and strain hardening behavior. The main results are as follows: all microstructural states showed high strength and ductility, which was achieved by a combination of strain-hardening and strain-rate hardening.
DOI of the first publication: 10.1557/jmr.2018.185
Link to this record: hdl:20.500.11880/28018
ISSN: 0884-2914
Date of registration: 8-Oct-2019
Faculty: NT - Naturwissenschaftlich- Technische Fakultät
Department: NT - Physik
Professorship: NT - Prof. Dr. Jürgen Eschner
Collections:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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