Results 51 to 60 of about 502,495 (311)

Nanoindentation Criteria for Combinatorial Thin Film Libraries

Advanced Engineering Materials, EarlyView.
Thin‐film material libraries are compositional spreads used for screening composition‐structure‐property relationships. Nanoindentation is often used to characterize mechanical behavior across these systems, however variations in methodology are widespread.
Andre Bohn, Adie Alwen, Andrea M. Hodge
wiley   +1 more source

Lamellar orientation control in directionally solidified TiAl intermetallics [PDF]

China Foundry, 2014
TiAl-based alloys are potentially used as high-temperature structural materials with a high specific strength in the range of ~ 900 °C. However, the mechanical properties of TiAl-based alloys are extremely anisotropic with respect to the lamellar ...
Su Yanqing, Liu Tong, Li Xinzhong
doaj  

On Directional Dendritic Growth and Primary Spacing—A Review

Crystals, 2020
The primary spacing is intrinsically linked with the mechanical behavior of directionally solidified materials. Because of this relationship, a significant amount of solidification work is reported in the literature, which relates the primary spacing to ...
Joel Strickland, Bogdan Nenchev, Hongbiao Dong   +2 more
doaj   +1 more source

In-situ observations of dendritic fragmentation during directional solidification of Sn-10wt.% Bi alloy [PDF]

China Foundry, 2019
The stray crystals seriously affect the properties of metals which fabricated by directional solidification (DS). In order to observe the formation of the stray crystals, the growth behavior of Sn-10wt.%Bi alloy was observed by synchrotron X-ray imaging ...
*Ji-hui Luo
doaj   +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

Microstructure and mechanical properties of Ni3Al intermetallics prepared by directional solidification electromagnetic cold crucible technique [PDF]

China Foundry, 2017
The present work focused on the Ni3Al-based alloy with a high melting point. The aim of the research is to study the effect of withdrawal rate on the microstructures and mechanical properties of directionally solidified Ni-25Al alloy.
Hong-sheng Ding, Guo-tian Wang, Rui-run Chen   +2 more
doaj   +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

Directional solidification of Al–Cu–Ag alloy

Applied Physics A, 2009
Al-Cu-Ag alloy was prepared in a graphite cru- cible under a vacuum atmosphere. The samples were direc- tionally solidified upwards under an argon atmosphere with different temperature gradients (G = 3.99-8.79 K/mm), at a constant growth rate (V = 8.30 µm/s), and with differ- ent growth rates (V = 1.83-498.25 µm/s), at a constant gradient (G = 8.79 K ...
Boyuk, U., Marasli, N., Kaya, H., Cadirli, E., Keslioglu, K.   +4 more
openaire   +5 more sources

Rafting of Ni‐Based Superalloys Under Multiaxial Load as Understood by Phase‐Field Simulations and Critical Experiments

Advanced Engineering Materials, EarlyView.
Phase‐field simulations coupled with dislocation‐density‐based crystal plasticity modeling reproduce γ′ rafting behavior in single‐crystal Ni‐based superalloys under varied loading conditions. The model captures both macroscopic creep and microscopic morphology evolution, with results matching high‐temperature creep experiments.
Micheal Younan, David Bürger, Gunther Eggeler, Oleg Shchyglo, Ingo Steinbach, Muhammad Adil Ali   +5 more
wiley   +1 more source

Influence of directional solidification parameters on the amount of quasicrystalline phase of an AlCuFe alloy

Journal of Alloys and Metallurgical Systems
In this work, a casting processing route via unidirectional solidification is proposed, where the severity of cooling can be increased to maximize the amount of quasicrystalline phase.
Thayza Pacheco dos Santos Barros, Rafael E. Caluête, Aline Karla Barbosa da Silva, Danniel Ferreira de Oliveira, Francisco Riccelly Pereira Feitosa, Bruno Alessandro Silva Guedes de Lima, Danielle Guedes de Lima   +6 more
doaj   +1 more source