Results 51 to 60 of about 264,106 (287)

On the electron-ion temperature ratio established by collisionless shocks [PDF]

, 2015
Astrophysical shocks are often collisionless shocks. An open question about collisionless shocks is whether electrons and ions each establish their own post-shock temperature, or whether they quickly equilibrate in the shock region.
Andrei Bykov, Bale, Blasi, Broersen, Bykov, Bykov, Cargill, Furuzawa, Ghavamian, Ghavamian, Helder, Itoh, Jacco Vink, Laming, Markevitch, Masters, Rakowski, Rakowski, Raymond, Raymond, Russell, Schwartz, Sjors Broersen, Sollerman, Stefano Gabici, van Adelsberg, Vink, Vink, Vink, Vink   +29 more
core   +5 more sources

Revisiting Stability Criteria in Ball‐Milled High‐Entropy Alloys: Do Hume–Rothery and Thermodynamic Rules Equally Apply?

Advanced Engineering Materials, Volume 27, Issue 6, March 2025.
The stability criteria affecting the formation of high‐entropy alloys, particularly focusing in supersaturated solid solutions produced by mechanical alloying, are analyzed. Criteria based on Hume–Rothery rules are distinguished from those derived from thermodynamic relations. The formers are generally applicable to mechanically alloyed samples.
Javier S. Blázquez, Alejandro F. Manchón‐Gordón, Antonio Vidal‐Crespo, Rafael Caballero‐Flores, Jhon J. Ipus, Clara F. Conde   +5 more
wiley   +1 more source

Characterization of Defect Distribution in an Additively Manufactured AlSi10Mg as a Function of Processing Parameters and Correlations with Extreme Value Statistics

Advanced Engineering Materials, EarlyView.
Predicting extreme defects in additive manufacturing remains a key challenge limiting its structural reliability. This study proposes a statistical framework that integrates Extreme Value Theory with advanced process indicators to explore defect–process relationships and improve the estimation of critical defect sizes. The approach provides a basis for
Muhammad Muteeb Butt, Varma Kvvssn, Hossein Laieghi, Zia Uddin, Peyman Ansari, E. Kıvanç Sadak, Can Barış Toprak, Hüseyin Kızıl, Enrico Salvati   +8 more
wiley   +1 more source

New method for transient cold wall heat flux measurements for unlimited exposure times

Scientific Reports
This paper presents a new method to measure high cold wall surface heat fluxes temporally resolved. It is based on a system identification approach, the so-called Non-Integer System Identification (NISI) method, which allows to correlate the surface heat
Fabian Hufgard, Christian Duernhofer, Clemens Mueller, Stefan Loehle   +3 more
doaj   +1 more source

Common envelope: enthalpy consideration

, 2011
In this Letter we discuss a modification to the criterion for the common envelope (CE) event to result in envelope dispersion. We emphasize that the current energy criterion for the CE phase is not sufficient for an instability of the CE, nor for an ...
Baker, Belczynski, Bisnovatyi-Kogan, Bisnovatyi-Kogan, Bisnovatyi-Kogan, Chandrasekhar, Chiu, Hansen, Ivanova, Ostriker, Paczynski, Podsiadlowski   +11 more
core   +1 more source

Laser Metal Deposition of Aluminum Alloys 7075 and 5083 with the Addition of Volatile Alloying Elements through Powder Blending

Advanced Engineering Materials, EarlyView.
This study investigates laser metal deposition of aluminum alloys EN AW‐7075 and EN AW‐5083, using powder blending to compensate zinc and magnesium evaporation. In situ alloying and ex situ alloying with ZnAl12 and AZ91 preserve near‐standard compositions and improve mechanical properties.
Finn Bendixen, Anastasiya Toenjes, Annika Bohlen, Thomas Seefeld   +3 more
wiley   +1 more source

Scaling criteria for wall thermal boundary conditions of air- and water-cooled free convective thin plates with volumetric heat generation

Case Studies in Thermal Engineering
This study proposes scaling criteria for the wall thermal boundary conditions of thin plates with volumetric heat generation based on free convective/conductive conjugate heat transfer analysis.
Moon Won Song
doaj   +1 more source

A sensitive calorimetric technique to study energy (heat) exchange at the nano-scale

, 2018
Every time a chemical reaction occurs, an energy exchange between reactants and environment exists, which is defined as the enthalpy of the reaction.
Basta, Luca, Coletti, Camilla, Dubois, Zoe, Fabbri, Filippo, Heun, Stefan, Mishra, Neeraj, Murata, Yuya, Veronesi, Stefano   +7 more
core   +1 more source

Thermochemistry of iron manganese oxide spinels [PDF]

, 2004
Oxide melt solution calorimetry has been performed on iron manganese oxide spinels prepared at high temperature. The enthalpy of formation of (MnxFe1−x)3O4 at 298 K from the oxides, tetragonal Mn3O4 (hausmannite) and cubic Fe3O4 (magnetite), is negative ...
Coradin, Hervé, Guillemet-Fritsch, Sophie, Navrotsky, Alexandra, Tailhades, Philippe, Wang, Miaojun   +4 more
core   +3 more sources

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