Results 81 to 90 of about 282,866 (344)

Direct Electron Detection Electron Energy‐Loss Spectroscopy: Speeding Up 2D Analytical In Situ Transmission Electron Microscopy for Aluminum Alloys

Advanced Engineering Materials, EarlyView.
Scanning transmission electron microscopy imaging techniques are an essential tool to document dynamic developments, such as precipitation in aluminum alloys, during in situ heating experiments using transmission electron microscopy. However, in many cases, chemical information is required to interpret complex nanoscale processes.
Evelin Fisslthaler, Martina Dienstleder, Judith Lammer, Moritz Theissing, Daniel Knez   +4 more
wiley   +1 more source

Counterrotating Dust Disk Around a Schwarzschild Black Hole: New Fully Integrated Explicit Exact Solution

Revista Integración, 2008
The first fully integrated explicit exact solution of Einstein's field equations corresponding to the superposition of a counterrotating dust disk with a central black hole is presented.
Guillermo A. Gonzàlez, Antonio C. Gutiérrez Piñeres   +1 more
doaj   +2 more sources

Fluorine Abundances in Local Stellar Populations

The Astronomical Journal
We present the first fluorine measurements in 12 normal K giants belonging to the Galactic thin and thick disks using spectra obtained with the Phoenix infrared spectrometer on the 2.1 m telescope at Kitt Peak. Abundances are determined from the (1−0) R9
K. E. Brady, C. A. Pilachowski, V. Grisoni, Z. G. Maas, K. A. Nault   +4 more
doaj   +1 more source

STAR FORMATION HISTORY IN THE GALACTIC THIN DISK

Odessa Astronomical Publications, 2007
We analyze the relations between the relative magnesium abundances in stars, [Mg/Fe], and their metallicities, Galactic orbital elements, and ages. The relative magnesium abundances in metal-poor thin-disk stars have been found to systematically decrease
V. A. Marsakov, M. V. Shapovalov, T. V. Borkova   +2 more
doaj   +1 more source

Impact of Various Rotary Friction Welding Process Parameters on the Mechanical Properties of a Steel–Aluminum Joint

Advanced Engineering Materials, EarlyView.
Rotary friction welding of steel E355 and the aluminum alloy EN AW‐6082 can lead to the formation of brittle intermetallic phases. The primary process parameters are varied in order to determine their influence on this intermetallic phase formation and the resulting mechanical properties.
Laura Huber, Phillipp Schultheiß, Michael Thiele, Christoph Rößler, Heinz Werner Höppel   +4 more
wiley   +1 more source

Accretion disks around Black Holes with Advection and Optical Depth Transition

, 2004
We consider the effects of advection and radial gradients of pressure and radial drift velocity on the structure of accretion disks around black holes with proper description of optically thick/thin transitions.
Bisnovatyi-Kogan G. S., Cherepashchuk A. M., Gennadi S. Bisnovatyi‐Kogan, Igor D. Novikov, Igor V. Igumenshchev, Luo C., Matsumoto R., Muchotrzeb B., Muchotrzeb B., Muchotrzeb-Czerny B., Paczynski B., Paczynski B., Pringle J. E., Shakura N. I., Shakura N. I., Yulia V. Artemova   +15 more
core   +2 more sources

(Nb,Ti)(C,N)‐Precipitates in High‐Strength Low‐Alloyed Steels—Modeling, Characterization and Validation

Advanced Engineering Materials, EarlyView.
Steel samples are investigated using complementary simulations and measurements. Transmission electron microscopy in bright‐field mode, combined with energy‐dispersive X‐ray spectroscopy maps for titanium and niobium, reveals distinct particle populations. Simulations reproduce these in size and composition.
Marc Laub, Christian Motz, Eric Detemple, Sebastian Scholl   +3 more
wiley   +1 more source

Electron-Positron Pairs in Hot Accretion Flows and Thin Disk Coronae

, 1999
We investigate equilibrium accretion flows dominated by $e^+ e^-$ pairs. We consider one- and two-temperature accretion disk coronae above a thin disk, as well as hot optically thin two-temperature accretion flows without an underlying thin disk; we ...
Ann A. Esin, Bjornsson G., Chen X., Di Matteo T., Di Matteo T., Haardt F., Kusunose M., Kusunose M., Kusunose M., Kusunose M., Liang E. P., Nakamura K. E., Poutanen J., Shakura N. I., Sikora M., Stepney S., Stern B. E., Sunyaev R. A., Svensson R., Zdziarski A. A.   +19 more
core   +1 more source

Additive Processing of Ti‐17 by Wire Arc Directed Energy Deposition: An Investigation of the Microstructure and Mechanical Properties

Advanced Engineering Materials, EarlyView.
This study focuses on processing the titanium alloy Ti‐17 using wire arc directed energy deposition (waDED), with an emphasis on the microstructure and mechanical properties. The waDED typical heat‐affected zone banding is characterized and related to the local mechanical properties.
Alexander Wenda, Thomas Klein, Florian Fahrnberger, Marcel Czipin, Karin Hartl, Clemens Simson, Martin Stockinger, Herbert Hutter   +7 more
wiley   +1 more source

Magnetostrictive behaviour of thin superconducting disks [PDF]

Superconductor Science and Technology, 2003
8 pages, 6 figures, submitted to Supercond. Sci. Technol., Proceed.
D. V. Shantsev, Tom H. Johansen
openaire   +3 more sources