Unveiling the Re effect in Ni-based single crystal superalloys

Xiaoxiang Wu (), Surendra Kumar Makineni (), Christian H. Liebscher, Gerhard Dehm, Jaber Rezaei Mianroodi, Pratheek Shanthraj, Bob Svendsen, David Bürger, Gunther Eggeler, Dierk Raabe and Baptiste Gault ()
Additional contact information
Xiaoxiang Wu: Max-Planck-Institut für Eisenforschung GmbH
Surendra Kumar Makineni: Max-Planck-Institut für Eisenforschung GmbH
Christian H. Liebscher: Max-Planck-Institut für Eisenforschung GmbH
Gerhard Dehm: Max-Planck-Institut für Eisenforschung GmbH
Jaber Rezaei Mianroodi: Max-Planck-Institut für Eisenforschung GmbH
Pratheek Shanthraj: Max-Planck-Institut für Eisenforschung GmbH
Bob Svendsen: Max-Planck-Institut für Eisenforschung GmbH
David Bürger: Ruhr-Universität Bochum
Gunther Eggeler: Ruhr-Universität Bochum
Dierk Raabe: Max-Planck-Institut für Eisenforschung GmbH
Baptiste Gault: Max-Planck-Institut für Eisenforschung GmbH

Nature Communications, 2020, vol. 11, issue 1, 1-13

Abstract: Abstract Single crystal Ni-based superalloys have long been an essential material for gas turbines in aero engines and power plants due to their outstanding high temperature creep, fatigue and oxidation resistance. A turning point was the addition of only 3 wt.% Re in the second generation of single crystal Ni-based superalloys which almost doubled the creep lifetime. Despite the significance of this improvement, the mechanisms underlying the so-called “Re effect” have remained controversial. Here, we provide direct evidence of Re enrichment to crystalline defects formed during creep deformation, using combined transmission electron microscopy, atom probe tomography and phase field modelling. We reveal that Re enriches to partial dislocations and imposes a drag effect on dislocation movement, thus reducing the creep strain rate and thereby improving creep properties. These insights can guide design of better superalloys, a quest which is key to reducing CO2 emissions in air-traffic.

Date: 2020
References: Add references at CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.nature.com/articles/s41467-019-14062-9 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-019-14062-9

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-019-14062-9

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().