Results 11 to 20 of about 9,586,286 (339)

Activation Volume and Energy for Dislocation Nucleation in Multi-Principal Element Alloys

open access: yesMetals, 2019
Incipient plasticity in multi-principal element alloys, CoCrNi, CoCrFeMnNi, and Al0.1CoCrFeNi was evaluated by nano-indentation and compared with pure Ni. The tests were performed at a loading rate of 70 μN/s in the temperature range of 298 K to 473
Sanghita Mridha   +2 more
doaj   +2 more sources

Advanced Nanoindentation Testing for Studying Strain-Rate Sensitivity and Activation Volume. [PDF]

open access: yesJOM (1989), 2017
Nanoindentation became a versatile tool for testing local mechanical properties beyond hardness and modulus. By adapting standard nanoindentation test methods, simple protocols capable of probing thermally activated deformation processes can be ...
Maier-Kiener V, Durst K.
europepmc   +2 more sources

Room-Temperature Creep Behavior and Activation Volume of Dislocation Nucleation in a LiTaO3 Single Crystal by Nanoindentation. [PDF]

open access: yesMaterials (Basel), 2019
The crystal orientation effect on mechanical heterogeneity of LiTaO3 single crystals is well known, whilst the time-dependent plastic behavior, i.e., creep is still short of understanding.
Ma Y, Huang X, Song Y, Hang W, Zhang T.
europepmc   +2 more sources

Activation Volume of Secondary Relaxation

open access: yesMaterials Sciences and Applications, 2011
Glass forming materials are characterized by a complex relaxation pattern, which evolves over several time decades. Dielectric spectroscopy has proven particularly useful for studying such scenario as it is able to monitor the dielectric dynamics of a system over a range up to 16 time decades.
S. Sharifi
openaire   +3 more sources

Flow Stress of bcc Metals over a Wide Range of Temperature and Strain Rates

open access: yesMetals, 2020
A physical-based model for the flow stress of bcc metals is presented. Here, thermally activated and viscous drag regimes are considered. For the thermally activated component of the flow stress, the diffusion-controlled regime at elevated temperature is
Gabriel Testa   +3 more
doaj   +1 more source

Experimental study on effect of oxygen volume fraction on spontaneous combustion characteristics of coal

open access: yesMeikuang Anquan, 2023
In order to study the effect of oxygen volume fraction on the spontaneous combustion of coal oxidation at low temperature, the non-adhering coal from a mine in Inner Mongolia was taken as the research object.
DING Xuqin, ZHANG Leilin
doaj   +1 more source

Preparation and electrochemical performance of hollow activated carbon fiber self-supported electrode for supercapacitor [PDF]

open access: yes, 2020
Hollow activated carbon fiber (HACF) with high specific surface area and high charge storage capability was prepared by pre-oxidation, carbonization and KOH-activation from polyacrylonitrile (PAN).
Cardon, Ludwig   +3 more
core   +1 more source

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

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

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

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