Results 71 to 80 of about 1,126,742 (354)

Investigating hot tearing in 6xxx-series aluminium alloys: A combined thermodynamic and experimental approach

Journal of Alloys and Metallurgical Systems
The hot tearing of 6xxx-series aluminium alloys has been investigated over four levels of silicon (0.6, 0.8, 1.0, 1.2 wt%), magnesium (0.4, 0.6, 0.8, 1.0 wt%), iron (0.2, 0.4, 0.6, 0.8 wt%) and manganese (0.0, 0.2, 0.4, 0.6 wt%).
Emidio Giansante, Alberto Fabrizi, Mohammad Pourgharibshahi, Giulio Timelli   +3 more
doaj   +1 more source

Particle-in-cell simulations of shock-driven reconnection in relativistic striped winds

, 2012
By means of two- and three-dimensional particle-in-cell simulations, we investigate the process of driven magnetic reconnection at the termination shock of relativistic striped flows.
Anatoly Spitkovsky, Bell A R, Bietenholz M F, Bogovalov S V, Buneman O, Chen G Armstrong T P, Hester J J, Jaroschek C H, Lorenzo Sironi, Lyubarsky Y, Oka M, Pétri J, Sikora M, Sironi L, Sironi L, Sironi L, Spitkovsky A, Stawarz Ł, Zenitani S, Zenitani S, Zenitani S, Zenitani S   +21 more
core   +1 more source

Growth rates of the Weibel and tearing mode instabilities in a relativistic pair plasma [PDF]

, 2007
We present an algorithm for solving the linear dispersion relation in an inhomogeneous, magnetised, relativistic plasma. The method is a generalisation of a previously reported algorithm that was limited to the homogeneous case.
Delcroix J L, Galeev A A, J G Kirk, J Pétri, Kirk J G, Kirk J G Lyubarsky Y Pétri J, Melrose D B, Morse P M, Pritchett P L, Pétri J, Spitkovsky A, Tautz R C, Trubnikov B A, Trubnikov B A, Zelenyi L M   +14 more
core   +1 more source

Interaction between Molten Al‐Killed Mn–B Steel and Carbon‐Bonded MgO Refractories Based on Recyclates

Advanced Engineering Materials, EarlyView.
High‐temperature interactions between low‐sulfur Al‐killed Mn–B steel and MgO–C refractories (0 and 50 wt% recyclates) are studied via finger immersion tests (1600 °C). Surface‐active elements influence infiltration. MgO/CaS layer forms, along with spinel and calcium silicate.
Matheus Roberto Bellé, Lukas Neubert, Anton Yehorov, Till M. J. Stadtmüller, Christos G. Aneziris, Olena Volkova   +5 more
wiley   +1 more source

The cracking behavior of the new Ni-based superalloy GH4151 in the triple melting process

Journal of Materials Research and Technology, 2023
In this paper, the mechanism of crack formation in VIM, ESR, and VAR of GH4151 alloy ingots is discussed. The cracks in VIM ingots are hot tearing, mainly caused by severe segregation of elements such as Nb, Ti, and Al in VIM electrodes, which promotes ...
Lei Jia, Heng Cui, Shufeng Yang, Shaomin Lv, Xingfei Xie, Jinglong Qu   +5 more
doaj   +1 more source

Bimetallic (NiFe) and Trimetallic (NiFeCr) Nanoalloys from Metal Oxides Using a Microwave Hydrogen Plasma

Advanced Engineering Materials, EarlyView.
Bimetallic (NiFe) and trimetallic (NiFeCr) nanoalloys (NAs) are synthesized using corresponding oxide mixtures using microwave hydrogen plasma within a few milliseconds. The process simultaneously 1) reduces metal oxides to metals; 2) downsizes the particles from micrometers to nanometers; and 3) blends the metals to form NAs.
Sachin Kumar, Mohammad Kazemi, Zichang Xiong, Thomas Cameron, Julian Held, Uwe Kortshagen   +5 more
wiley   +1 more source

Evolution of the Relativistic Plasmoid-Chain in the Poynting-Dominated Plasma

, 2013
In this paper, we investigate the evolution of the plasmoid-chain in a Poynting-dominated plasma. We model the relativistic current sheet with cold background plasma using the relativistic resistive magnetohydrodynamic approximation, and solve its ...
Takamoto, Makoto
core   +1 more source

Influence of Sample Preparation and Processing Procedures on the Thermal Diffusivity of MgO‐C Refractories

Advanced Engineering Materials, EarlyView.
The thermal diffusivity of MgO‐C refractories is highly sensitive to sample preparation and processing procedures. In this article, the effects of coking sequence, machining conditions, structural inhomogeneity, and graphite coating application on measurements using laser flash apparatus are systematically investigated.
Luyao Pan, Rhena Wulf, Till M. J. Stadtmüller, Christos G. Aneziris, Tobias M. Fieback   +4 more
wiley   +1 more source

Effect of process parameters and grain refinement on hot tearing susceptibility of high strength aluminum alloy 2139 in laser powder bed fusion

Progress in Additive Manufacturing, 2022
High strength aluminum alloys, especially those that are age-hardenable, such as 2xxx series, 6xxx series, and 7xxx series, are widely used as structural materials in transport and aerospace industries due to their good mechanical properties.
J. Elambasseril, M. Benoit, Suming Zhu, M. Easton, E. Lui, C. Brice, M. Qian, M. Brandt   +7 more
semanticscholar   +1 more source

Four‐Point Bending Tests at High Temperatures on Commercial MgO‐C Refractory Bricks with and Without Recyclate Considering Different Carbon Contents

Advanced Engineering Materials, EarlyView.
Four‐point bending tests are conducted in an argon atmosphere on commercial MgO‐C brick grades with and without MgO‐C recyclate from room temperature up to 1300 °C. No detrimental effect of the MgO‐C recyclates on bending strength is found. Instead, a decisive influence of the total carbon content is observed, with lower total carbon contents ...
Alexander Schramm, Lukas Knöchel, Thomas Schemmel, Christos G. Aneziris, Anja Weidner, Horst Biermann   +5 more
wiley   +1 more source