Sustainability through alloy design: Challenges and opportunities

JL Cann, A De Luca, DC Dunand, D Dye… - Progress in Materials …, 2021 - Elsevier
Exciting metallurgical breakthroughs of the last decades alongside the development and
wide-ranging availability of new and more capable experimental and theoretical tools for …

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 …

Superior high-temperature properties and deformation-induced planar faults in a novel L12-strengthened high-entropy alloy

YL Zhao, T Yang, YR Li, L Fan, B Han, ZB Jiao, D Chen… - Acta Materialia, 2020 - Elsevier
We developed a novel high-performance L1 2-strengthened high-entropy alloy (HEA) in the
multicomponent Ni-Co-Fe-Cr-Al-Nb system. The phase transformation, mechanical …

L12-strengthened multicomponent Co-Al-Nb-based alloys with high strength and matrix-confined stacking-fault-mediated plasticity

BX Cao, WW Xu, CY Yu, SW Wu, HJ Kong, ZY Ding… - Acta Materialia, 2022 - Elsevier
This study presents the alloy development of a new class of L1 2-strengthened Co-Al-Nb-
based alloys with high γ′-solvus temperatures together with superb strengths at both …

On the faulting and twinning mediated strengthening and plasticity in a γʹ strengthened CoNi-based superalloy at room temperature

P Pandey, M Heczko, N Khatavkar, N Mazumder… - Acta Materialia, 2023 - Elsevier
Microscopic defects and their mutual interactions are fundamentally important in deciding
the load carrying capacity of structural materials. In this context, the present work reports an …

[HTML][HTML] On the microtwinning mechanism in a single crystal superalloy

D Barba, E Alabort, S Pedrazzini, DM Collins… - Acta Materialia, 2017 - Elsevier
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< …

On the diffusive phase transformation mechanism assisted by extended dislocations during creep of a single crystal CoNi-based superalloy

SK Makineni, A Kumar, M Lenz, P Kontis, T Meiners… - Acta Materialia, 2018 - Elsevier
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 …

Temperature-dependent yield strength and deformation mechanism of a casting Ni-based superalloy containing low volume-fraction γ′ phase

K Hou, M Wang, P Zhao, M Ou, H Li, Y Ma… - Journal of Alloys and …, 2022 - Elsevier
This study investigates the temperature-dependent yield strength and deformation
mechanism of a new casting Ni-based superalloy K4750. This alloy exhibits yield strength …

[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 …

L12-strengthened heterostructure high-entropy alloys with ultra-high strength over a wide temperature range

JL Yuan, Z Wang, X Jin, PD Han, JW Qiao - Materials Science and …, 2022 - Elsevier
The L1 2-strengthened heterostructure Co 40 Cr 20 Ni 30 Mo 2 Al 4 Ti 4 (at%) high-entropy
alloys (HEAs) exhibit excellent tensile mechanical properties over a wide temperature …