Results 21 to 30 of about 1,192,982 (215)

High-Temperature Nano-Indentation Creep of Reduced Activity High Entropy Alloys Based on 4-5-6 Elemental Palette

open access: yesEntropy, 2020
There is a strong demand for materials with inherently high creep resistance in the harsh environment of next-generation nuclear reactors. High entropy alloys have drawn intense attention in this regard due to their excellent elevated temperature ...
Maryam Sadeghilaridjani   +3 more
doaj   +1 more source

On the Size Effect of Strain Rate Sensitivity and Activation Volume for Face-Centered Cubic Materials: A Scaling Law

open access: yesCrystals, 2020
In a recent experimental study of indentation creep, the strain rate sensitivity (SRS) and activation volume v* have been noticed to be dependent on the indentation depth or loading force for face-centered cubic materials.
Xiazi Xiao, Hao Liu, Long Yu
doaj   +1 more source

Cell volume controlled by LRRC8A-formed volume-regulated anion channels fine-tunes T cell activation and function

open access: yesNature Communications, 2023
Biosynthesis drives the cell volume increase during T cell activation. However, the contribution of cell volume regulation in TCR signaling during T lymphoblast formation and its underlying mechanisms remain unclear.
Yuman Wang   +15 more
doaj   +1 more source

Micro and nanoparticulate PP/CaCO3 composites mechanical, thermal and transport properties - DOE [PDF]

open access: yesPolímeros
Composite based on PP/CaCO3 contained micro and nanoparticles were investigated in relation its activation volume, mechanical, thermal and transport properties.
Juliano Martins Barbosa   +5 more
doaj   +1 more source

Theoretical strength and homogeneous sliding in metallic glass: exactly solvable model

open access: yesJournal of the Mechanical Behavior of Materials, 2013
At low temperature, T→0, the yield stress of a perfect crystal is equal to its so-called theoretical strength. The yield stress of nonperfect crystals is controlled by the stress threshold of dislocation mobility.
Lazarev Nikolai, Bakai Alexander
doaj   +1 more source

large area goaf; coal spontaneous combustion; buoyancy effect; multi-field coupling; numerical simulation

open access: yesMeikuang Anquan, 2022
In order to effectively prevent and control coal spontaneous combustion disasters in Tangjiahui Mine, thermogravimetric experiments were used to analyze the thermal reaction kinetics characteristics of coal samples at different heating rates and ...
WEN Hu   +6 more
doaj   +1 more source

Pressure Dependence of Magnesite Creep

open access: yesGeosciences, 2019
We determined the activation volumes (V*) for polycrystalline magnesite with grain sizes of 2 and 80 µm deforming by low temperature plasticity (LTP) mechanisms (kinking and dislocation glide), diffusion creep, and dislocation creep at temperatures ...
Joseph W. Millard   +9 more
doaj   +1 more source

Additional studies on heterodiffusion coefficients in periclase [PDF]

open access: yesNatural Hazards and Earth System Sciences, 2012
By using a thermodynamical model, the activation entropy is extracted from the experimental diffusion data of Al in MgO. Furthermore, we estimate the activation volume. We find a value for the activation entropy of (4.21 ± 0.05) k.
E. Dologlou
doaj   +1 more source

Probing the impact of grain interior and grain boundaries on the mechanical behavior of a high-Mn austenitic steel

open access: yesJournal of Materials Research and Technology, 2022
We elucidate here the grain orientation/grain boundary dependence on the deformation behavior of high-Mn steel via tensile tests. The ultra-fine grained/fine grained (UFG/FG) specimen was characterized by superior strength-ductility combination as ...
Chengyang Hu   +7 more
doaj   +1 more source

Plasma Levels of Soluble P-Selectin, Beta-Thromboglobulin and Platelet Indices in Patients With Prediabetes: Effects of Acute Hyperglycemic Stress

open access: yesEndocrinology Research and Practice, 2022
Objective: To examine the effects of acute hyperglycemic stress on platelet activation by analyzing the plasma levels of P-selectin, beta-thromboglobulin, and platelet indices in an oral glucose tolerance test (OGTT).
Nesibe Esra YAŞAR, Dildar KONUKOĞLU
doaj   +1 more source

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