The precipitation and effect of topologically close-packed phases in Ni-based single crystal superalloys

J Li, J Sun, J Liu, X Sun - Journal of Materials Science & Technology, 2024 - Elsevier
The precipitation of topologically close-packed (TCP) phases is the result of microstructure
instabilities of Ni-based superalloys. This review seeks to comprehensively collate all the …

Crack initiation mechanisms during very high cycle fatigue of Ni-based single crystal superalloys at high temperature

A Cervellon, S Hémery, P Kürnsteiner, B Gault… - Acta Materialia, 2020 - Elsevier
Crack initiation mechanisms in the very high cycle fatigue (VHCF) regime of nickel-based
single-crystal (SX) superalloys have been investigated at high temperature (1000° C) and …

Atomistic phase field chemomechanical modeling of dislocation-solute-precipitate interaction in Ni–Al–Co

JR Mianroodi, P Shanthraj, P Kontis, J Cormier, B Gault… - Acta Materialia, 2019 - Elsevier
Dislocation-precipitate interaction and solute segregation play important roles in controlling
the mechanical behavior of Ni-based superalloys at high temperature. In particular, the …

Enhanced creep performance in a polycrystalline superalloy driven by atomic-scale phase transformation along planar faults

L Lilensten, S Antonov, B Gault, S Tin, P Kontis - Acta Materialia, 2021 - Elsevier
Predicting the mechanical failure of parts in service requires understanding their
deformation behavior, and associated dynamic microstructural evolution up to the near …

On the segregation of Re at dislocations in the γ'phase of Ni-based single crystal superalloys

X Wu, SK Makineni, P Kontis, G Dehm, D Raabe… - Materialia, 2018 - Elsevier
We report evidence of Re and Mo segregation (up to 2.6 at.% and 1 at.%) along with Cr and
Co to the dislocations inside of γ'precipitates in a second generation Ni-based single crystal …

A Review on the Partitioning of Solutes Along Dislocations and Stacking Faults in Superalloys

P Kontis, TM Smith - Metallurgical and Materials Transactions A, 2024 - Springer
Chemical and microstructural alterations at near-atomic scale can influence the high
temperature mechanical performance of superalloys. These alterations are strongly …

Chemical redistribution and change in crystal lattice parameters during stress relaxation annealing of the AD730TM superalloy

M Durand, J Cormier, F Paumier, S Katnagallu… - Acta Materialia, 2022 - Elsevier
The present study aims to understand the underlying mechanisms of macroscopic
contraction that occurs in γ/γ′ nickel based superalloys submitted to isothermal annealing …

Nucleation mechanism of hetero-epitaxial recrystallization in wrought nickel-based superalloys

S Katnagallu, S Vernier, MA Charpagne, B Gault… - Scripta Materialia, 2021 - Elsevier
The mechanism of inverse precipitation of γ-like shells forming around primary γ'leading to
heteroepitaxial recrystallization after thermomechanical processing was studied. The …

[HTML][HTML] Ultra-high temperature creep of Ni-based SX superalloys at 1250 C

S Utada, L Despres, J Cormier - Metals, 2021 - mdpi.com
Very high temperature creep properties of twelve different Ni-based single crystal
superalloys have been investigated at 1250° C and under different initial applied stresses …

[HTML][HTML] Effect of withdrawal rate on the microstructure and static recrystallization behavior of Ni-based single crystal superalloy

FZ Xu, W Xiong, YC Lin, DX Ma, BW Cheng… - Journal of Materials …, 2024 - Elsevier
The deformation characteristics after directional solidification at different withdrawal rates
and static recrystallization (SRX) during solution heat treatment of Ni-based single-crystal …