Journal Article

PUBDB-2018-03753

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png High strength nanocrystalline Cu–Co alloys with high tensile ductility

Bachmaier, A. (Corresponding author)Extern* ; Rathmayr, G. B. ; Schmauch, J. ; Schell, N.HZG* ; Stark, A.Extern* ; de Jonge, N. ; Pippan, R.Extern*

2019
Cambridge Univ. Press Cambridge [u.a.]

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Please use a persistent id in citations: doi:10.1557/jmr.2018.185  doi:10.3204/PUBDB-2018-03753

Abstract: A supersaturated single-phase Cu–26 at.% Co alloy was produced by high-pressure torsiondeformation, leading to a nanocrystalline microstructure with a grain size smaller than 100 nm.The nonequilibrium solid solution decomposed during subsequent isothermal annealing. In situhigh-energy X-ray diffraction was used to map changes linked to the separating phases, and thedevelopment of a nanoscale Cu–Co composite structure was observed. To gain further informationabout 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 onthe in situ diffraction data, different isothermal annealing temperatures were chosen. Miniaturizedtensile specimens with a round cross section were tested, and an image-based data evaluationmethod enabled the evaluation of true stress–strain curves and strain hardening behavior. The mainresults are as follows: all microstructural states showed high strength and ductility, which wasachieved by a combination of strain-hardening and strain-rate hardening.

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Contributing Institute(s):

1. Zentrum für Material- und Küstenforschung (HZG)
2. DOOR-User (DOOR)

Research Program(s):

1. 6G3 - PETRA III (POF3-622) (POF3-622)

Experiment(s):

1. PETRA Beamline P07 (PETRA III)

Appears in the scientific report 2019

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Database coverage:
; ; ; Allianz-Lizenz / DFG ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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