Results 81 to 90 of about 80,897 (317)

Investigation of Iron‐Aluminide‐Like Phase Composition in Complex Concentrated Fe32Cu12Ni11Ti16Al29 Alloy

Advanced Engineering Materials, EarlyView.
This work reveals the phase composition and quantitative morphology analysis of precipitation‐hardened Fe32Cu12Ni11Ti16Al29 complex‐concentrated alloy. The precipitates are shown to have a high coherency. Morphology transition between sphere, cuboidal, and elongated morphology is observed. Finally, the overaging behavior is captured using microhardness.
Rostyslav Nizinkovskyi, Lukas Hanisch, Georg Hasemann, Puspendu Sahu, Manja Krüger   +4 more
wiley   +1 more source

Identification of Possible Stellar Companions via Speckle Interferometry in a Sample of Be Stars II

The Astronomical Journal
This study investigates the identification of possible stellar companions in a sample of Be stars using speckle interferometry. Be stars, which are rapidly rotating B-type stars exhibiting emission lines due to the presence of circumstellar disks, have ...
C. A. Guerrero, T. B. Souza, M. Borges Fernandes, A. D. Guajardo Jurado   +3 more
doaj   +1 more source

Astronomical optical interferometry, II: Astrophysical results [PDF]

Serbian Astronomical Journal, 2011
Optical interferometry is entering a new age with several ground- based long-baseline observatories now making observations of unprecedented spatial resolution.
Jankov S.
doaj   +1 more source

Microstructural Evolution and Mechanical Property Degradation of Sn0.5Ag0.7Cu5Bi Solder Joints with High Indium Alloying

Advanced Engineering Materials, EarlyView.
This study identifies 12 wt% indium (In) as the optimal composition for Sn0.5Ag0.7Cu5Bi solder joints, achieving 87% ductile fracture and 81% suppression of intermetallic compound (IMC) growth versus 4 wt% In. High‐In alloys (15–17 wt%) show abnormal IMC thickening due to thermal activation.
Liuwei Wang, Huidong Gu, Xiaojing Wang, Shanshan Cai, Saad Alshammari, Gaber A. M. Mersal, Yanlai Wang, Xulei Wu, Hanhui Lei, Juanna Ren, Mohamed M. Ibrahim, Terence X. Liu   +11 more
wiley   +1 more source

Toward Maximum Utilization of Heavy Rare Earths in Sintered Nd–Fe–B Magnets by Grain Boundary Diffusion Source and Application Area Optimization

Advanced Engineering Materials, EarlyView.
In this work, the grain boundary diffusion process is optimized to maximize heavy rare earth utilization by strategic magnetic hardening of areas in the magnet such as corners or edges that are highly susceptible to demagnetization, as demonstrated by finite element magnetostatics simulation on an internal permanent magnet, synchronous traction motor ...
Abdullatif Durgun, Dominik Ohmer, Matthias Katter, Andreas Thul, Simon Steentjes, Hossein Sepehri Amin, Oliver Gutfleisch, Imants Dirba   +7 more
wiley   +1 more source

WASP-180Ab: Doppler tomography of a hot Jupiter orbiting the primary star in a visual binary [PDF]

Monthly Notices of the Royal Astronomical Society, 2019
ABSTRACT We report the discovery and characterization of WASP-180Ab, a hot Jupiter confirmed by the detection of its Doppler shadow and by measuring its mass using radial velocities. We find the 0.9  ±  0.1 MJup, 1.24  ±  0.04 RJup planet to be in a misaligned, retrograde orbit around an F7 star with Teff  =  6500 K and a moderate ...
Monika Lendl, Francesco Pepe, L. Y. Temple, Coel Hellier, Emmanuel Jehin, Amaury H. M. J. Triaud, Oliver Turner, Oliver Turner, Daniel F. Evans, C. Murray, Damien Ségransan, Khalid Barkaoui, Khalid Barkaoui, Susan E. Thompson, B. Zouhair, D. J. A. Brown, Don Pollacco, Michaël Gillon, Pierre F. L. Maxted, Louise D. Nielsen, Richard G. West, A. Collier Cameron, David R. Anderson, Barry Smalley, Elsa Ducrot, L. Delrez, D. Queloz, James McCormac, François Bouchy, Stéphane Udry, Artem Burdanov   +30 more
openaire   +6 more sources

Characterizing the Cool KOIs. VI. H- and K-band Spectra of Kepler M Dwarf Planet-Candidate Hosts [PDF]

, 2014
We present H- and K-band spectra for late-type Kepler Objects of Interest (the "Cool KOIs"): low-mass stars with transiting-planet candidates discovered by NASA's Kepler Mission that are listed on the NASA Exoplanet Archive.
Baranec, Christoph, Becker, Juliette, Covey, Kevin R., Feiden, Gregory A., Hamren, Katherine, Johnson, John Asher, Law, Nicholas M., Lloyd, James P., Muirhead, Philip S., Price, Ellen M., Riddle, Reed, Rojas-Ayala, Bárbara, Schlawin, Everett, Thorp, Rachel, Vanderburg, Andrew   +14 more
core   +3 more sources

Design of Multiphase Compositionally Complex Alloys for Enhanced Hardness at Elevated Temperatures and Machinability: Comparative Study with Inconel 718

Advanced Engineering Materials, EarlyView.
This study compares the mechanical properties of Inconel 718 with two newly developed compositionally complex alloys (CCAs). Inco‐like‐H alloy demonstrates significantly improved wear resistance, surface finish, and hardness, notably at high temperatures. This CCA requires no heat treatment and is well suited for additive manufacturing. Its performance
Laurent Peltier, Gaël Le Coz, Fodil Meraghni, Jérome Slowensky   +3 more
wiley   +1 more source

A High-resolution Imaging Survey of Massive Young Stellar Objects in the Magellanic Clouds

The Astrophysical Journal
Constraints on the binary fraction of massive young stellar objects (mYSOs) are important for binary and massive star formation theory. Here, we present speckle imaging of 34 mYSOs located in the Large Magellanic Cloud (1/2 Z _⊙ ) and Small Magellanic ...
Venu M. Kalari, Ricardo Salinas, Hans Zinnecker, Monica Rubio, Gregory Herczeg, Morten Andersen   +5 more
doaj   +1 more source

Lucky Imaging survey for southern M dwarf binaries

, 2010
While M dwarfs are the most abundant stars in the Milky Way, there is still large uncertainty about their basic physical properties (mass, luminosity, radius, etc.) as well as their formation environment. Precise knowledge of multiplicity characteristics
Allen, Allen, Baraffe, Beuzit, Bouy, Brandner, Burgasser, C. Bergfors, Close, Daemgen, Dommanget, Dommanget, Duquennoy, Eggenberger, F. Hormuth, Feigelson, Fischer, Frankowski, Fruchter, Gershberg, Ghez, Goldman, Hillenbrand, Hippler, Holberg, Holmberg, Joergens, K. Geissler, Kasper, Kraus, Köhler, Köhler, Law, Leinert, Lépine, M. Janson, Mason, McCarthy, Montes, Norton, Patience, R. Köhler, Reid, Reid, Reid, Riaz, S. Daemgen, S. Hippler, Seabroke, Shkolnik, Siegler, Strigachev, T. Henning, Thies, Torres, V. Joergens, Voges, W. Brandner, Zuckerman, Zuckerman   +59 more
core   +1 more source