Results 21 to 30 of about 508,157 (301)

Effect of Oil – Corrosion on Tensile and Fatigue S-N Curve Properties of AA6061-T6 [PDF]

open access: yesEngineering and Technology Journal, 2021
The present study described the effect of shot peening on mechanical properties and rotating corrosion –fatigue behavior (strength and life) of AA6061-T6. Ultimate tensile strength (UTS) and yield stress (YS) were reduced by 4.6% and 1.24% when immersing
Hussain J.M. Al-Alkawi   +2 more
doaj   +1 more source

Hardness-Aware Deep Metric Learning [PDF]

open access: yesComputer Vision and Pattern Recognition, 2019
This paper presents a hardness-aware deep metric learning (HDML) framework. Most previous deep metric learning methods employ the hard negative mining strategy to alleviate the lack of informative samples for training.
Wenzhao Zheng   +3 more
semanticscholar   +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

Comparison of the effects of MoSi2 and CrSi2 on sintering and properties of titanium diboride (TiB2) [PDF]

open access: yesProcessing and Application of Ceramics, 2023
Titanium diboride (TiB2) is a typical material classified as structural ceramics. However, sintering of TiB2 ceramics is difficult mainly because of a significant fraction of covalent bonds in the structure. In order to obtain dense TiB2 ceramics various
Gubernat Agnieszka   +6 more
doaj   +1 more source

Modelling Timbral Hardness

open access: yesApplied Sciences, 2019
Hardness is the most commonly searched timbral attribute within freesound.org, a commonly used online sound effect repository. A perceptual model of hardness was developed to enable the automatic generation of metadata to facilitate hardness-based ...
Andy Pearce, Tim Brookes, Russell Mason
doaj   +1 more source

The Hall–Petch and inverse Hall–Petch relations and the hardness of nanocrystalline metals

open access: yesJournal of Materials Science, 2019
We review some of the factors that influence the hardness of polycrystalline materials with grain sizes less than 1 µm. The fundamental physical mechanisms that govern the hardness of nanocrystalline materials are discussed.
Sneha N. Naik, S. Walley
semanticscholar   +1 more source

Soft-Tissue-Mimicking Using Hydrogels for the Development of Phantoms

open access: yesGels, 2022
With the currently available materials and technologies it is difficult to mimic the mechanical properties of soft living tissues. Additionally, another significant problem is the lack of information about the mechanical properties of these tissues ...
Aitor Tejo-Otero   +6 more
doaj   +1 more source

Proof verification and hardness of approximation problems

open access: yesProceedings., 33rd Annual Symposium on Foundations of Computer Science, 1992
The class PCP(f(n),g(n)) consists of all languages L for which there exists a polynomial-time probabilistic oracle machine that used O(f(n)) random bits, queries O(g(n)) bits of its oracle and behaves as follows: If x in L then there exists an oracle y ...
Sanjeev Arora   +4 more
semanticscholar   +1 more source

Modeling hardness of polycrystalline materials and bulk metallic glasses [PDF]

open access: yes, 2011
Though extensively studied, hardness, defined as the resist ance of a material to deformation, still remains a challengi ng issue for a formal theoretical description due to its inherent mechani c l complexity.
Xing-Qiu Chen   +3 more
semanticscholar   +2 more sources

INVESTIGATION OF PROPERTIES OF CURRENT COLLECTOR ELEMENTS AND THEIR EFFECT ON THE PERFORMANCE OF TRIBOSYSTEM «CONTACT WIRE - CURRENT COLLECTOR ELEMENT»

open access: yesNauka ta progres transportu, 2015
Purpose. The paper is devoted to the detailed analysis of interrelations at the contact point of friction pair «contact wire – current collector insert».
Yu. L. Bolshakov, A. V. Antonov
doaj   +1 more source

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