Results 61 to 70 of about 12,903,177 (147)

On the Load Dependence of Micro-Hardness Measurements: Analysis of Data by Different Models and Evaluation of Measurement Errors

open access: yesArchives of Metallurgy and Materials, 2016
The influence of applied loads between 0.09807 N and 0.9807 N on measured values of micro-hardness was evaluated by Meyer’s index n, proportional specimen resistance model (PSR) and Hays – Kendall methods, Total Dispersion Zone and Analysis of Variance ...
Petrík J.
doaj   +1 more source

Permanent indentation characterization for low-velocity impact modelling using three-point bending test [PDF]

open access: yes, 2014
This paper deals with the origin of permanent indentation in composite laminates subjected to low-velocity impact. The three-point bending test is used to exhibit a non-closure of matrix crack which is assumed as a cause of permanent indentation ...
Bouvet, Christophe   +3 more
core   +1 more source

Testing 3D Printed Carbon Fiber Durability for Next‐Gen Fusion Reactors via Proton Irradiation

open access: yesPolymer Composites, Volume 47, Issue 1, Page 924-941, 10 January 2026.
Schematic of proton irradiation effects on carbon fiber samples evaluated via nanoindentation and Raman spectroscopy. ABSTRACT Carbon fiber‐reinforced composites are promising candidates for plasma‐facing components (PFCs) in next‐generation fusion reactors due to their high strength‐to‐weight ratio, thermal stability, and radiation resistance. However,
U. Saleem   +7 more
wiley   +1 more source

Influence of cobalt addition and calcination temperature on the physical properties of BaFe12O19 hexaferrites nanoparticles

open access: yesMaterials Research Express, 2020
Nano-scale particles of pure Barium hexaferrite ‘BaFe _12 O _19 ’ and Cobalt added Barium hexaferrite ‘Co _x BaFe _12 O _19 ’, with x = 0.04, 0.06 and 0.1 wt%, were successfully synthesized by the chemical co-precipitation method.
M Rekaby, H Shehabi, R Awad
doaj   +1 more source

Study on Size Effect in Indentation Tests

open access: yes, 2022
The depth dependence of the indentation hardness, i.e., the indentation size effect (ISE), was manifested as an increase or decrease in hardness when penetration depth decreases, which was observed by previous experiments.
Jianpu Zhang   +5 more
core   +1 more source

Water Parameters and Hydrodynamics in Rivers and Caves Hosting Astyanax mexicanus Populations Reveal Macro‐, Meso‐ and Microhabitat Characteristics

open access: yesEcology and Evolution, Volume 16, Issue 1, January 2026.
From 2009 to 2025, we have recorded the physicochemical parameters of the water and the hydrological regimes at localities hosting Astyanax mexicanus cavefish and surface fish populations in Mexico. Sampling 13 caves and 30 surface stations revealed strong signatures of the two macrohabitats, but also significant differences in specific water ...
Laurent Legendre   +5 more
wiley   +1 more source

Theoretical and experimental researches of size effect in micro-indentation test

open access: yes, 2001
Micro-indentation tests at scales on the order of sub-micron have shown that the measured hardness increases strongly with the indent depth or indent size decreasing, which is frequently referred to as the size effect.
Wei, YG (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100080, Peoples R China.   +4 more
core   +1 more source

Nanoindentation Properties of Ti‐yAl‐Mo Fabricated via Plasma Activated Sintering

open access: yesMicro &Nano Letters, Volume 21, Issue 1, January/December 2026.
Ti‐yAl‐1Mo alloys were synthesised via plasma‐activated sintering, achieving near‐full densification and predominantly α‐Ti microstructures. Nanoindentation revealed strong composition‐dependent improvements, with Ti‐7Al‐1Mo showing more than double the hardness of commercially pure titanium.
Samson Olaitan Jeje   +1 more
wiley   +1 more source

Farmed Sea Lettuce (Ulva fenestrata) as a Promising Ingredient for Rainbow Trout (Oncorhynchus mykiss)

open access: yesAquaculture Nutrition, Volume 2026, Issue 1, 2026.
Introducing novel and sustainable feed ingredients is essential to improve the environmental impact of fish aquaculture. Some species of seaweed, such as the green alga sea lettuce (Ulva fenestrata), constitute a promising novel ingredient due to their suitable amino acid profile and favourable growth traits. However, the effects of farmed Ulva in feed
Marica Andersson   +10 more
wiley   +1 more source

Indentation Size Effect on the Hardness of Silicon Carbide Ceramics [PDF]

open access: yesKemija u Industriji, 2010
The Vickers hardness of CVD SiC ceramics is determined as a function of the indentation load. Vickers hardness pyramid-shaped sharp diamond indenter with angle between opposite faces at an angle of 136° was used to apply five indentation loads of 4.91; 9.
.Grilec, K:, Rede, V., Ćurković, L.
doaj  

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