The role of interstitial constituents in refractory complex concentrated alloys

CH Belcher, BE MacDonald, D Apelian… - Progress in Materials …, 2023 - Elsevier
To meet the growing demand for transportation and energy consumption around the world,
more efficient turbine engines and power generators with higher operating temperatures are …

[HTML][HTML] Grain boundary segregation in Ni-base alloys: A combined atom probe tomography and first principles study

AS Ebner, S Jakob, H Clemens, R Pippan… - Acta materialia, 2021 - Elsevier
Grain boundary engineering (GBE) plays an important role in the design of new
polycrystalline materials with enhanced mechanical properties. This approach has been …

Implication of grain-boundary structure and chemistry on plasticity and failure

G Dehm, J Cairney - MRS Bulletin, 2022 - Springer
Failure processes are often linked to interfaces, their atomistic structure and chemistry.
Therefore, a detailed understanding of failure processes requires knowledge of structural …

The segregation of transition metals to iron grain boundaries and their effects on cohesion

HL Mai, XY Cui, D Scheiber, L Romaner, SP Ringer - Acta materialia, 2022 - Elsevier
The segregation of transition metal elements to grain boundaries in steels plays a critical
role in determining their cohesion. Here, we investigate the segregation, co-segregation …

Revealing the room temperature superplasticity in bulk recrystallized molybdenum

W Chen, X Li, S Jin, L Yang, Y Li, X He… - Nature …, 2023 - nature.com
Body-centered cubic refractory metallic materials exhibit excellent high-temperature
strength, but often suffer from brittle intergranular fracture due to the recrystallization-induced …

[HTML][HTML] In-situ observation of damage evolution in Mo-SiCf/SiC heterogeneous composite

S Zhang, H Qin, Z Li, C Wei, C Zhang, X Li - Composites Part B …, 2023 - Elsevier
Abstract Innovative metal-SiC f/SiC heterogeneous structure composites are promising
accident tolerance fuel cladding materials for the Gen IV advanced reactors. The mechanical …

Impact of the segregation energy spectrum on the enthalpy and entropy of segregation

D Scheiber, L Romaner - Acta materialia, 2021 - Elsevier
Substantial disagreement exists for segregation energies between experimentally measured
and first principles calculated values. To resolve this standing issue, we computed …

Achieving an unprecedented strength-ductility balance of molybdenum alloy by homogeneously distributing yttrium-cerium oxide

L Xu, N Li, W Song, T Sun, Y Zhou, S Wei… - Journal of Alloys and …, 2022 - Elsevier
Rare earth (Y/Ce) were homogeneously distributed in molybdenum alloys by liquid-liquid
doping and powder metallurgy method, and the molybdenum alloys plates were obtained …

[HTML][HTML] Hydrogen assisted intergranular cracking of alloy 725: The effect of boron and copper alloying

I Taji, T Hajilou, AS Ebner, D Scheiber, S Karimi… - Corrosion science, 2022 - Elsevier
To overcome the Hydrogen embrittlement (HE) susceptibility of the standard Alloy 725 (Mod
A), two alloys with minor alloying modifications with B (Mod B) and B+ Cu (Mod C) were …

Crack‐Free Tungsten Fabricated via Laser Powder Bed Fusion Additive Manufacturing

T Ramakrishnan, A Kumar, TS Kumar… - Advanced Functional …, 2024 - Wiley Online Library
Additive manufacturing of tungsten (W) is challenging due to its high melting point, high
thermal conductivity, oxidation tendency, and brittleness from grain boundary (GB) oxides. In …