[HTML][HTML] The Portevin-Le Chatelier effect in nickel-base superalloys: Origins, consequences and comparison to strain ageing in other alloy systems
BS Rowlands, C Rae, E Galindo-Nava - Progress in Materials Science, 2023 - Elsevier
Abstract Dynamic Strain Ageing (DSA) has reached widespread acceptance since its
proposal in the 1940's as the mechanism behind the Portevin-Le Chatelier effect in ferritic …
proposal in the 1940's as the mechanism behind the Portevin-Le Chatelier effect in ferritic …
Precipitate shearing, fault energies, and solute segregation to planar faults in Ni-, CoNi-, and Co-base superalloys
YM Eggeler, KV Vamsi… - Annual Review of Materials …, 2021 - annualreviews.org
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 …
[HTML][HTML] A model for dislocation creep in polycrystalline Ni-base superalloys at intermediate temperatures
EI Galindo-Nava, R Schlütter, O Messé… - International Journal of …, 2023 - Elsevier
A model for creep at intermediate temperatures in polycrystalline Ni-based superalloys is
presented. The model is based on describing stacking fault nucleation, propagation and …
presented. The model is based on describing stacking fault nucleation, propagation and …
[HTML][HTML] On the microtwinning mechanism in a single crystal superalloy
The contribution of a microtwinning mechanism to the creep deformation behaviour of single
crystal superalloy MD2 is studied. Microtwinning is prevalent for uniaxial loading along< …
crystal superalloy MD2 is studied. Microtwinning is prevalent for uniaxial loading along< …
Segregation and η phase formation along stacking faults during creep at intermediate temperatures in a Ni-based superalloy
In this paper, the local compositional and structural changes occurring in association with
stacking faults in a Ni-base superalloy are characterized and related to the possible rate …
stacking faults in a Ni-base superalloy are characterized and related to the possible rate …
High resolution energy dispersive spectroscopy mapping of planar defects in L12-containing Co-base superalloys
Local chemical fluctuations in the vicinity of superlattice intrinsic stacking faults (SISFs) have
been observed via high resolution energy dispersive X-ray spectroscopy (EDS) mapping in …
been observed via high resolution energy dispersive X-ray spectroscopy (EDS) mapping in …
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 …
Planar defect formation in the γ′ phase during high temperature creep in single crystal CoNi-base superalloys
The structure and formation mechanism of extended planar defects in the γ/γ′
microstructure of creep deformed CoNi-base single crystal superalloys have been studied …
microstructure of creep deformed CoNi-base single crystal superalloys have been studied …
On the diffusive phase transformation mechanism assisted by extended dislocations during creep of a single crystal CoNi-based superalloy
We propose here a deformation-induced diffusive phase transformation mechanism
occurring during shearing of γ′ ordered phase in a γ/γ′ single crystalline CoNi-based …
occurring during shearing of γ′ ordered phase in a γ/γ′ single crystalline CoNi-based …