Precipitate shearing, fault energies, and solute segregation to planar faults in Ni-, CoNi-, and Co-base superalloys
The mechanical properties of superalloys are strongly governed by the resistance to
shearing of ordered precipitates by dislocations. In the operating environments of …
shearing of ordered precipitates by dislocations. In the operating environments of …
Unveiling the Re effect in Ni-based single crystal superalloys
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 …
aero engines and power plants due to their outstanding high temperature creep, fatigue and …
Effect of stacking fault segregation and local phase transformations on creep strength in Ni-base superalloys
In this study, two similar, commercial polycrystalline Ni-based disk superalloys (LSHR and
ME3) were creep tested at 760° C and 552 MPa to approximately 0.3% plastic strain. LSHR …
ME3) were creep tested at 760° C and 552 MPa to approximately 0.3% plastic strain. LSHR …
[HTML][HTML] Nucleation of superlattice intrinsic stacking faults via cross-slip in nickel-based superalloys
FD León-Cázares, R Schlütter, F Monni, MC Hardy… - Acta Materialia, 2022 - Elsevier
Superlattice intrinsic stacking faults (SISF) are the main culprit for the low temperature creep
deformation of modern nickel-based superalloys used in jet engines. While these faults were …
deformation of modern nickel-based superalloys used in jet engines. While these faults were …
Understanding creep of a single-crystalline Co-Al-W-Ta superalloy by studying the deformation mechanism, segregation tendency and stacking fault energy
A systematic study of the compression creep properties of a single-crystalline Co-base
superalloy (Co-9Al-7.5 W-2Ta) was conducted at 950, 975 and 1000° C to reveal the …
superalloy (Co-9Al-7.5 W-2Ta) was conducted at 950, 975 and 1000° C to reveal the …
Atomic structure and elemental segregation behavior of creep defects in a Co-Al-W-based single crystal superalloys under high temperature and low stress
With the aim of understanding the effect of creep defects in the γ′ phase on the creep
resistance, the atomic structure and elemental segregation behavior of stacking faults (SFs) …
resistance, the atomic structure and elemental segregation behavior of stacking faults (SFs) …
Localized phase transformation at stacking faults and mechanism-based alloy design
A new phenomenon has been observed in some Ni-based superalloys where phase
transformations occur at and are confined to stacking faults, which we refer to as localized …
transformations occur at and are confined to stacking faults, which we refer to as localized …
Local phase transformation strengthening at Microtwin boundaries in nickel-based superalloys
This work investigated two similar polycrystalline alloys, differing by only 1 at% Nb content,
which elucidated its effect on local phase transformation strengthening during high …
which elucidated its effect on local phase transformation strengthening during high …
Segregation-assisted phase transformation and anti-phase boundary formation during creep of a γ′-strengthened Co-based superalloy at high temperatures
In this study, the creep defects and segregation-assisted local phase transformation
processes in a γ′-strengthened Co-based superalloy crept at 982° C/248 MPa-1% and …
processes in a γ′-strengthened Co-based superalloy crept at 982° C/248 MPa-1% and …
Pore-induced defects during thermo-mechanical fatigue of a fourth-generation single crystal superalloy
Z Tan, X Wang, J Pang, M Zou, Y Tao… - Materials Research …, 2023 - Taylor & Francis
Comparable investigation of pore-induced defects during in-phase (IP) and out-of-phase
(OP) thermo-mechanical fatigue (TMF) were conducted on fourth-generation single crystal …
(OP) thermo-mechanical fatigue (TMF) were conducted on fourth-generation single crystal …