Effects of Ru on elemental partitioning and precipitation of topologically close-packed phases in Ni-based superalloys

Two Ni-based superalloys (one Ru-free and one containing 1at.% Ru) were comparatively studied by Atom Probe Tomography and complimentary techniques. Ru addition impedes precipitation of the sigma phase at 950 degree C. Ru partitions nearly equally to the gamma and sigma phase. Neither reverse elemen...

Full description

Saved in:
Bibliographic Details
Published inScripta materialia Vol. 101; pp. 44 - 47
Main Authors Peng, Zirong, Povstugar, Ivan, Matuszewski, Kamil, Rettig, Ralf, Singer, Robert, Kostka, Aleksander, Choi, Pyuck-Pa, Raabe, Dierk
Format Journal Article
LanguageEnglish
Published 01.05.2015
Subjects
Lattices
Nickel
Nucleation
Partitioning
Phases
Precipitation
Superalloys
Tomography
Online AccessGet full text

Cover

More Information
Summary:Two Ni-based superalloys (one Ru-free and one containing 1at.% Ru) were comparatively studied by Atom Probe Tomography and complimentary techniques. Ru addition impedes precipitation of the sigma phase at 950 degree C. Ru partitions nearly equally to the gamma and sigma phase. Neither reverse elemental partitioning nor destabilization of the gamma ' phase is detected when adding Ru. We propose an increase in the gamma / sigma lattice misfit caused by Ru as a major reason for impeded nucleation of the sigma phase.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1359-6462
DOI:10.1016/j.scriptamat.2015.01.014