Next Article in Journal
On the Zener–Hollomon Parameter, Multi-Layer Perceptron and Multivariate Polynomials in the Struggle for the Peak and Steady-State Description
Next Article in Special Issue
Cyclic Creep Behavior and Modified Life Prediction of Bainite 2.25Cr-1Mo Steel at 455 °C
Previous Article in Journal
Novel Multicomponent B2-Ordered Aluminides: Compositional Design, Synthesis, Characterization, and Thermal Stability
Previous Article in Special Issue
On Temperature Dependence of Microstructure, Deformation Mechanisms and Tensile Properties in Austenitic Cr-Mn Steel with Ultrahigh Interstitial Content C + N = 1.9 Mass.%
Open AccessArticle

Temperature Dependent Solid Solution Strengthening in the High Entropy Alloy CrMnFeCoNi in Single Crystalline State

1
Metals and Alloys, University of Bayreuth, 95447 Bayreuth, Germany
2
Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
3
Bundesanstalt für Materialforschung und -prüfung, 12205 Berlin, Germany
*
Author to whom correspondence should be addressed.
Metals 2020, 10(11), 1412; https://doi.org/10.3390/met10111412
Received: 2 September 2020 / Revised: 21 October 2020 / Accepted: 22 October 2020 / Published: 23 October 2020
(This article belongs to the Special Issue Creep and Deformation of Metals and Alloys at Elevated Temperatures)
The main difference between high entropy alloys and conventional alloys is the solid solution strengthening effect, which shifts from a single element to a multi-element matrix. Little is known about the effectiveness of this effect at high temperatures. Face-centered cubic, equiatomic, and single crystalline high entropy alloy CrMnFeCoNi was pre-alloyed by arc-melting and cast as a single crystal using the Bridgman process. Mechanical characterization by creep testing were performed at temperatures of 700, 980, 1100, and 1200 °C at different loads under vacuum and compared to single-crystalline pure nickel. The results allow a direct assessment of the influence of the chemical composition without any disturbance by grain boundary sliding or diffusion. The results indicate different behaviors of single crystalline pure nickel and CrMnFeCoNi. At 700 °C CrMnFeCoNi is more creep-resistant than Ni, but at 980 °C both alloys show a nearly similar creep strength. Above 980 °C the creep behavior is identical and the solid solution strengthening effect of the CrMnFeCoNi alloy disappears. View Full-Text
Keywords: high entropy alloy; HEA; single crystal; CrMnFeCoNi; creep behavior; solid solution strengthening high entropy alloy; HEA; single crystal; CrMnFeCoNi; creep behavior; solid solution strengthening
Show Figures

Graphical abstract

MDPI and ACS Style

Gadelmeier, C.; Haas, S.; Lienig, T.; Manzoni, A.; Feuerbacher, M.; Glatzel, U. Temperature Dependent Solid Solution Strengthening in the High Entropy Alloy CrMnFeCoNi in Single Crystalline State. Metals 2020, 10, 1412.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop