304 citations · 688 across the 15 of their papers we have counts for
15 papers
Atomic-scale insights on grain boundary segregation in a cathode battery material
Inger-Emma Nylund, Elise R. Eilertsen, Constantinos A. Hatzoglou +5
The grain boundary segregation of the Co-free pristine spinel LiNi0.5Mn1.5O4 cathode material has been studied by transmission electron microscopy and atom probe tomography. The se…
Towards establishing best practice in the analysis of hydrogen and deuterium by atom probe tomography
Baptiste Gault, Aparna Saksena, Xavier Sauvage +42
As hydrogen is touted as a key player in the decarbonization of modern society, it is critical to enable quantitative H analysis at high spatial resolution, if possible at the atom…
Nanoscale characterisation of hydrides and secondary phase particles in Zircaloy-4
Wenjun Lu, Paraskevas Kontis, Siyang Wang +4
The interaction of hydrogen and metals continues to be industrially relevant and is a critical part of creating and supporting a safety case for nuclear reactor operation. In the p…
On the role of boron, carbon and zirconium on hot cracking and creep resistance of additively manufactured polycrystalline superalloys
Arthur Després, Stoichko Antonov, Charlotte Mayer +4
We investigate the hot cracking susceptibility and creep resistance of three versions of a nickel-based superalloy with different contents of boron, carbon and zirconium fabricated…
Mechanisms of Ti3Al precipitation in hcp alpha-Ti
Felicity F. Dear, Paraskevas Kontis, Baptiste Gault +3
Nucleation and growth of TiAl \textalpha{} ordered domains in \textalpha{}-Ti--Al--X alloys were characterised using a combination of transmission electron microscopy, atom…
A cracking oxygen story: a new view of stress corrosion cracking in titanium alloys
Sudha Joseph, Paraskevas Kontis, Yanhong Chang +4
Titanium alloys can suffer from halide-associated stress corrosion cracking at elevated temperatures e.g., in jet engines, where chlorides and Ti-oxide promote the cracking of wate…
On the coarsening mechanism and deformation of borides under annealing and creep in a polycrystalline superalloy
Lola Lilensten, Aleksander Kostka, Sylvie Lartigue-Korinek +4
We have investigated the coarsening mechanism of intergranular Cr-rich M2B borides after creep and annealing at 850C for approximately 3000 hours in a polycrystalline nickel-based…
Enhanced creep performance in a polycrystalline superalloy driven by atomic-scale phase transformation along planar faults
Lola Lilensten, Stoichko Antonov, Baptiste Gault +2
Predicting the mechanical failure of parts in service requires understanding their deformation behavior, and associated dynamic microstructural evolution up to the near-atomic scal…
Spinodal decomposition versus classical gamma-prime nucleation in a nickel-base superalloy powder: An in-situ neutron diffraction and atomic-scale analysis
David M Collins, Neil D'Souza, Chinnapat Panwisawas +4
Contemporary powder-based polycrystalline nickel-base superalloys inherit microstructures and properties that are heavily determined by the thermo-mechanical treatments during proc…
Atomic-scale grain boundary engineering to overcome hot-cracking in additively-manufactured superalloys
Paraskevas Kontis, Edouard Chauvet, Zirong Peng +9
There are still debates regarding the mechanisms that lead to hot cracking in parts build by additive manufacturing (AM) of non-weldable Ni-based superalloys. This lack of in-depth…
Influence of composition and precipitation evolution on damage at grain boundaries in a crept polycrystalline Ni-based superalloy
Paraskevas Kontis, Aleksander Kostka, Dierk Raabe +1
The microstructural and compositional evolution of intergranular carbides and borides prior to and after creep deformation at 850 C in a polycrystalline nickel-based supera…
On the segregation of Re at dislocations in the γ' phase of Ni-based single crystal superalloys
Xiaoxiang Wu, Surendra Kumar Makineni, Paraskevas Kontis +4
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 cr…
Quantification challenges for atom probe tomography of hydrogen and deuterium in Zircaloy-4
Isabelle Mouton, Andrew J. Breen, Siyang Wang +8
Analysis and understanding of the role of hydrogen in metals is a significant challenge for the future of materials science, and this is a clear objective of recent work in the ato…
Atomic scale analysis of grain boundary deuteride growth front in Zircaloy-4
A. J. Breen, I. Mouton, W. Lu +11
Zircaloy-4 (Zr-1.5%Sn-0.2%Fe-0.1%Cr wt. %) was electrochemically charged with deuterium to create deuterides and subsequently analysed with atom probe tomography and scanning trans…
The Laplace project: an integrated suite for correlative atom probe tomography and electron microscopy under cryogenic and UHV conditions
Leigh T. Stephenson, Agnieszka Szczepaniak, Isabelle Mouton +13
We present sample transfer instrumentation and integrated protocols for the preparation and correlative characterization of environmentally-sensitive materials by both atom probe t…