Results 71 to 80 of about 14,432 (265)

Microstructure Evolution of a VMnFeCoNi High‐Entropy Alloy After Synthesis, Swaging, and Annealing

Advanced Engineering Materials, EarlyView.
The synthesis and processing (rotary swaging and annealing) of the novel VMnFeCoNi alloy is investigated, alongside the estimation of the grain size effect on hardness. Analysis of a wide grain size range of recrystallized microstructures (12–210 µm) reveals a low annealing twin density.
Aditya Srinivasan Tirunilai, Zeki Ayrildi, Buse Şen, Maik Rajkowski, Mathias Redondo Garcia, Markus Stricker, Guillaume Laplanche   +6 more
wiley   +1 more source

Lipid signatures in two functionally selected effluents from clinically relevant postoperative pancreatic fistulas are associated with graded, cell type–specific transcriptional responses

Scientific Reports
Clinically relevant postoperative pancreatic fistula (CR-POPF) remains a major cause of morbidity after pancreatoduodenectomy, yet the biochemical composition of postoperative effluents and their effects on anastomotic healing remain poorly understood ...
Johannes D. Lettner, Marvin Schwarzer, Simon Lagies, Bernd Kammerer, Stephanie Mewes, Sophia Chikhladze, Stefan Fichtner-Feigl, Geoffroy Andrieux, Dietrich A. Ruess, Uwe A. Wittel   +9 more
doaj   +1 more source

Creep‐Induced Microstructural Evolution in an A2‐B2 Superalloy

Advanced Engineering Materials, EarlyView.
A 27.3Ta‐27.3Mo‐27.3Ti‐8Cr‐10Al (at.%) refractory high‐entropy alloy with precipitation‐strengthened A2‐B2 microstructure was studied by creep tests at 1030°C, which demonstrate a transition in deformation mechanisms in the range of 100–150 MPa applied stress. This is associated with changes in dislocation–precipitate interactions. Relevant deformation
Liu Yang, Aparajita Pramanik, Sandipan Sen, Shubhashis Dixit, Marcel Muench, R. J. Vikram, Daniel Schliephake, Yolita M. Eggeler, Ankur Chauhan, Martin Heilmaier, Alexander Kauffmann   +10 more
wiley   +1 more source

CR Embeddings, Chains, and the Fefferman Bundle

, 2010
In this paper it is shown that a CR embedding from one strictly pseudoconvex hypersurface into another (of strictly larger dimension) sends chains on the source to chains on the target if and only if the embedding has a lift to a conformal isometry of the associated Fefferman bundles with vanishing pseudo-Riemannian second fundamental form.
openaire   +2 more sources

Equivariant embeddings of strongly pseudoconvex CR manifolds

, 2020
Ich untersuche CR Mannigfaltigkeiten mit eigentlichen, transversalen Gruppenwirkungen. Zuerst zeige ich, dass sich solche Mannigfaltigkeiten immer äquivariant in eine komplexe Mannigfaltigkeit mit holomorpher Gruppenwirkung einbetten lassen. Dies nutze ich, um zu beweisen, dass der Quotient nach der Wirkung immer die Struktur eines komplexen Raumes ...
openaire   +2 more sources

Influence of Test Temperature and Test Frequency on Fatigue Life of Aluminum Alloy EN AW‐2618A

Advanced Engineering Materials, EarlyView.
The influence of test temperature and test frequency on the fatigue life of EN AW‐2618A is investigated. High‐cycle fatigue tests are performed at different test temperatures and frequencies on the 1000 h/230°C overaged state. Both test parameters reduce fatigue life due to time‐dependent damage mechanisms.
Ying Han, Julian M. Rosalie, Jan Radners, Mauro Madia, Philipp von Hartrott, Birgit Skrotzki   +5 more
wiley   +1 more source

Adsorption of Cr(VI) and Pb(II) ions using an Fe3O4-decorated CaCO3 composite derived from waste eggshells

Next Materials
CaCO3-based nanomaterials have garnered extensive attention for their outstanding efficacy in separating toxic heavy metals (HMs) from aqueous solutions. However, a major challenge lies in retrieving adsorbents during the remediation process, which could
Ufra Naseer, Atif Ahmad, Abu Huraira, Moazzam Ali, Muhammad Ali, Chenchen Wu, Asim Mushtaq, Tianxiang Yue, Sajid Farooq, Muhammad Yousaf   +9 more
doaj   +1 more source

Wavelet-Based Watermarking and Compression for ECG Signals with Verification Evaluation

Sensors, 2014
In the current open society and with the growth of human rights, people are more and more concerned about the privacy of their information and other important data.
Kuo-Kun Tseng, Xialong He, Woon-Man Kung, Shuo-Tsung Chen, Minghong Liao, Huang-Nan Huang   +5 more
doaj   +1 more source

Partial rigidity of degenerate CR embeddings into spheres

Advances in Mathematics, 2013
In this paper, we study degenerate CR embeddings $f$ of a strictly pseudoconvex hypersurface $M\subset \bC^{n+1}$ into a sphere $\bS$ in a higher dimensional complex space $\bC^{N+1}$. The degeneracy of the mapping $f$ will be characterized in terms of the ranks of the CR second fundamental form and its covariant derivatives.
openaire   +3 more sources

Creep Properties and Deformation Mechanism of Additively Manufactured NiAl‐CrMo Composites

Advanced Engineering Materials, EarlyView.
Additively manufactured NiAl‐CrMo composites contain numerous interfaces and cell boundaries that control their creep response. At 700°C under high applied stress, creep is dominated by dislocation‐controlled power‐law mechanisms. At 800°C–900°C and lower stresses, creep is primarily diffusion‐controlled along cell boundaries.
Jan Vollhüter, Andreas Bezold, Johan Westraadt, Katharina Fiegl, Subham Chattoraj, Benjamin Wahlmann, Carolin Körner, Michael Mills, Mathias Göken, Steffen Neumeier   +9 more
wiley   +1 more source