Results 61 to 70 of about 119,471 (294)

First-principles calculation of phase transitions and mechanical properties of (CoCrNi)100−xAlx (0 ≤ x ≤ 28 at. %) high-entropy alloys

AIP Advances
In the two-phase high-entropy alloys (HEAs) (i.e., FCC, BCC), the modulation of the BCC phase is crucial for improving the mechanical properties of FCC-type HEAs. The stability of the phase of (CoCrNi)100−xAlx (0 ≤ x ≤ 28 at.
Leilei Li, Shangyu Zhai
doaj   +1 more source

Phase Stability and Inverse Hall-Petch Effect of Severely Deformed and Annealed CrMnFeCoNi High-Entropy Alloy [PDF]

Archives of Metallurgy and Materials
The reverse phase transition from hexagonal close-packed (hcp) to face-centered cubic (fcc) was studied using diffraction of high-energy synchrotron radiation and hardness measurements on the CrMnFeCoNi high-entropy alloy deformed by high-pressure ...
R. Chulist, N. Poręba, W. Skrotzki, A. Wójcik, A. Szewczyk, N. Schell, A. Hohenwarter, R. Pippan, W. Maziarz   +8 more
doaj   +1 more source

Coverage-dependent adsorption sites in the K/Ru(0001) system: a low-energy electron-diffraction analysis [PDF]

, 1992
The two ordered phases p(2 × 2) at a coverage θ = 0.25 and (√3 × √3)R30° at θ = 0.33 of potassium adsorbed on Ru(0001) were analyzed by use of low-energy electron-diffraction (LEED).
Andersson, Barnes, Demuth, dePaola, Duszak, Fisher, G. Ertl, H. Bludau, H. Over, Hutchins, Kleinle, Kleinle, M. Gierer, Michalk, Moritz, Over, Pauling, Pendry, T. Hertel, Tüshaus, Van Hove, von Eggeling, W. Moritz, Wang, Wang, Weimer   +25 more
core   +1 more source

Thermomechanical Fatigue and Creep–Fatigue Interaction of Inconel 718 Additively Manufactured by Laser Beam Powder Bed Fusion

Advanced Engineering Materials, EarlyView.
Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth, Tomáš Babinský, Jan Lars Riedel, Wen Hao Kan, Aijun Huang, Martin Heilmaier, Ivo Šulák   +6 more
wiley   +1 more source

Estimation of the chemical compositions and corresponding microstructures of AgInCd absorber under irradiation condition

Nuclear Engineering and Technology, 2020
AgInCd alloy is widely used as neutron absorber in nuclear reactors. However, the AgInCd control rods may fail during service due to the irradiation swelling. In the present study, a calculational method is proposed to calculate the composition change of
Hongsheng Chen, Chongsheng Long, Hongxing Xiao, Tianguo Wei, Guan Le   +4 more
doaj   +1 more source

Topology of the Spin-polarized Charge Density in bcc and fcc Iron

, 2017
We investigate the topology of the spin-polarized charge density in bcc and fcc iron. While the total spin-density is found to possess the topology of the non-magnetic prototypical structures, in some cases the spin-polarized densities are characterized ...
Dennis P. Clougherty, Mark E. Eberhart, P. Villars, R. F. W. Bader, S. H. Vosko, Travis E. Jones   +5 more
core   +1 more source

Combined Process‐ and Phase‐Field‐Simulation to Predict the Microstructure of Single‐Crystal Ni‐Based Superalloys

Advanced Engineering Materials, EarlyView.
A combined finite element and phase‐field approach predicts the evolution of microstructure during the directional solidification of Ni‐based superalloys. The model reveals how withdrawal rate, temperature gradient, and wall thickness control the dendrite spacing, highlighting the strong effect of surface regions in thin sections where dendrite growth ...
Sean Böhm, André B. Baldissera, Rainer Völkl, Uwe Glatzel   +3 more
wiley   +1 more source

Controlled synthesis of Pt3Sn/C electrocatalysts with exclusive Sn-Pt interaction designed for use in direct methanol fuel cells [PDF]

, 2013
Alloy-type Sn-Pt/C electrocatalysts with Pt/Sn= 1.8-3.0 ratios and exclusive Sn-Pt interaction have been prepared by means of Controlled Surface Reactions (CSRs).
Borbáth, Irina, Drotár, Eszter, Gubán, Dorottya, Gómez de la Fuente, José Luis, Herranz, Tirma, Pászti, Zoltán, Rojas, Sergio, Sajó, István, Tompos, András   +8 more
core   +1 more source

Low‐Angle Grain Boundaries and Re‐Segregation in Single‐Crystalline Ni‐Base Superalloys

Advanced Engineering Materials, EarlyView.
This work demonstrates that Re‐segregation at low‐angle grain boundaries (LAGBs) in Ni‐base superalloys is influenced by misorientation angle. Advanced microscopy and atom probe tomography reveal that higher misorientation angles increases Re‐segregation.
Alireza B. Parsa, Aparna Saksena, Alesander Kostka, Pascal Thome, Felicitas Scholz, Alexandre Mussi, Christoph Somsen, Baptiste Gault, Jan Frenzel, Gunther Eggeler   +9 more
wiley   +1 more source

Metastable phase and nanotwin's formation in undercooled equiatomic solid solution medium entropy alloys

Journal of Materials Research and Technology
The metastability of undercooled melts plays a critical role in driving non-equilibrium solidification in equiatomic solid solution medium-entropy alloys (MEAs), yet remains largely unexplored.
Hailong Liang, Xiaolong Xu, Hongen An, Hongfu Wang   +3 more
doaj   +1 more source