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A Novel Method for Predicting Residual Stress in GH4169 Machined Surfaces through Micro-Hardness Measurement

open access: yesApplied Sciences, 2023
The presence of residual stress seriously affects the mechanical performance and reliability of engineering components. Here, the authors propose a novel method to determine corresponding residual stress through micro-hardness measurements of machined ...
Gonghou Yao, Zhanqiang Liu, Haifeng Ma
doaj   +1 more source

On determination of elastic modulus and indentation hardness by instrumented spherical indentation: influence of surface roughness and correction method

open access: yesMaterials Research Express, 2023
Although, surface roughness can influence the determination of elastic moduli and indentation hardness to some extent by instrumented spherical indentation test, limited work has been done to quantitatively reveal and minimize these influences.
Guangjian Peng   +5 more
doaj   +1 more source

Indentation Size Effect of Composite A356 + 6%FA Subjected to ECAP

open access: yesMetals, 2022
In this study, metal matrix-based composite (MMC) was subjected to Equal Chanel Angular Pressing (ECAP) in several passes to determine the influence of deformation on the hardness of the samples. Composite based on A356 aluminum alloy and reinforced with
Merima Muslić   +3 more
doaj   +1 more source

Martens Hardness of CAD/CAM Resin-Based Composites

open access: yesApplied Sciences, 2022
(1) Background: The properties of CAD/CAM resin-based composites differ due to differences in their composition. Instrumented indentation testing can help to analyze these differences with respect to hardness, as well as energy-converting capabilities ...
Martin Rosentritt   +4 more
doaj   +1 more source

Modification of the Leeb Impact Device for Measuring Hardness by the Dynamic Instrumented Indentation Method

open access: yesInventions, 2022
The article is devoted to modification of the impact devices of Leeb hardness testers for the implementation of the dynamic instrumented indentation method.
Aleksander Umanskii   +3 more
doaj   +1 more source

Crystal Indentation Hardness

open access: yesCrystals, 2017
There is expanded interest in the long-standing subject of the hardness properties of materials. A major part of such interest is due to the advent of nanoindentation hardness testing systems which have made available orders of magnitude increases in ...
Ronald W. Armstrong   +2 more
doaj   +1 more source

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

An algorithm for indentation image classification and detection based on deep learning

open access: yesMeasurement: Sensors, 2021
In the measurement of hardness value, indentation is the key to obtain the hardness value. Traditional manual detection of indentation is inefficient, time-consuming and low accuracy.
Chen Shilin, Shi Wei
doaj  

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

Indentation size effect and hardness of materials [PDF]

open access: yesE3S Web of Conferences, 2023
In recent decades, the Indentation Size Effect (ISE), which manifests itself as a change in fixed hardness depending on indentation conditions, has become one of the most urgent problems of modern materials science.
Udalov A.V., Udalov A.A.
doaj   +1 more source

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