Results 11 to 20 of about 45,260 (306)

On the Invariance of Hardness at Vickers Indentation of Pre-Stressed Materials

open access: yesMetals, 2017
The influence from residual surface stresses on global indentation properties, i.e., hardness and size of the contact area, have been studied quite frequently in recent years.
Per-Lennart Larsson
doaj   +1 more source

Depth-sensing indentation tests in studying plastic instabilities [PDF]

open access: yes, 2004
This review surveys the phenomenon of plastic instabilities occurring in depth-sensing indentation measurements. Investigations presented focus on the characterization of Portevin-Le Chatelier type instabilities observed in different metal alloys during ...
Bobji   +14 more
core   +1 more source

What is indentation hardness? [PDF]

open access: yesSurface and Coatings Technology, 2000
Using dimensional analysis and finite element calculations, we derive simple scaling relationships for loading and unloading curve, contact depth, and hardness. The relationship between hardness and the basic mechanical properties of solids, such as Young's modulus, initial yield strength, and work-hardening exponent, is then obtained.
Yang-Tse Cheng, Che-Min Cheng
openaire   +1 more source

Effective indenter radius and frame compliance in instrumented indentation testing using a spherical indenter [PDF]

open access: yes, 2009
We introduce a novel method to correct for imperfect indenter geometry and frame compliance in instrumented indentation testing with a spherical indenter.
Kang, Ingeun   +3 more
core   +1 more source

Indentation hardness, plasticity and initial creep properties of nanosilver sintered joint

open access: yesResults in Physics, 2019
The nanoindentation test was conducted in this paper to investigate the indentation hardness, plasticity and initial creep properties of pressure sintered nanosilver joint at various test temperatures.
Hao Zhang   +5 more
doaj   +1 more source

Analysis of indentation size effect in copper and its alloys [PDF]

open access: yes, 2013
For describing the indentation size effect (ISE), numerous models, which relate the load or hardness to the indent dimensions, have been proposed. Unfortunately, it is still difficult to associate the different parameters involved in such relationships ...
CHICOT, Didier   +6 more
core   +7 more sources

Effect of Heavy Ion Irradiation Dosage on the Hardness of SA508-IV Reactor Pressure Vessel Steel

open access: yesMetals, 2017
Specimens of the SA508-IV reactor pressure vessel (RPV) steel, containing 3.26 wt. % Ni and just 0.041 wt. % Cu, were irradiated at 290 °C to different displacement per atom (dpa) with 3.5 MeV Fe ions (Fe2+).
Xue Bai   +4 more
doaj   +1 more source

Exfoliated Graphite Reinforced PMMA Composite: A Study on Nanoindentation and Scratch Behavior

open access: yesJournal of Nanotechnology, 2012
The present work aims to compare the scratch hardness (Hs) with the indentation hardness (HIT) obtained from nanoindentation measurements of exfoliated graphite/poly (methyl methacrylate) (EG/PMMA) composites. EG/PMMA composites with thickness 50 μm each
Himel Chakraborty   +3 more
doaj   +1 more source

A contact area function for Berkovich nanoindentation : Application to hardness determination of a TiHfCN thin film [PDF]

open access: yes, 2014
In nanoindentation, especially at very low indenter displacements, the indenter/material contact area must be defined in the best possible way in order to accurately determine the mechanical properties of the material.
AUMAITRE, R.   +7 more
core   +9 more sources

The mechanical properties of shale based on micro-indentation test

open access: yesPetroleum Exploration and Development, 2015
In view of the difficulty to get mechanical characteristics of shale reservoirs, a quantitative evaluation method based on micro-indentation test technology was proposed to research the meso-mechanical properties of shale.
Ping CHEN   +3 more
doaj   +1 more source

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