Results 11 to 20 of about 29,052 (189)

Mechanical performance and fracture behavior of Fe₄₁Co₇Cr₁₅Mo₁₄Y₂C₁₅B₆ bulk metallic glass [PDF]

open access: yes, 2007
The mechanical properties of a new Fe₄₁Co₇Cr₁₅Mo₁₄Y₂C₁₅B₆ bulk glassy alloy were studied by impact bending, compression, and hardness tests carried out at room temperature.
Chen, Qingjun   +3 more
core   +2 more sources

Improvement design of existing threshing machine at Kilang Sawit Risda, Ulu Keratong [PDF]

open access: yes, 2020
Palm oil is very important in the agricultural and economic sectors in Malaysia. It’s origin is in the tropical rain forest region of West Africa, which the main belt runs through the southern latitudes of Cameron, Cote D’ ivoire, Ghana, Liberia, Nigeria,
Chen, Chit Wee   +8 more
core   +2 more sources

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

Effects of Sodium Hypochlorite Irrigation on Dentine Hardness

open access: yesJournal of the Dow University of Health Sciences, 2010
Introduction: An endodontic treatment consists of removing all contents of the root canal system during the shaping phase.Irrigation is presently the best method for the removal of tissue remnants and dentine debris during instrumentation ...
Shahbaz Ahmed   +2 more
doaj   +4 more sources

Effect of indentation load and time on knoop and vickers microhardness tests for enamel and dentin

open access: yesMaterials Research, 2009
The aim of this study was to determine the effect of variations in indentation load and time on the Knoop and Vickers hardness numbers (KHN and VHN) for enamel and dentin.
Chanya Chuenarrom   +2 more
doaj   +1 more source

The Effect of LED Light on Depth of Cure and Microhardness of Three Types of Bulkfill Composite

open access: yesJournal of Baghdad College of Dentistry, 2016
Background: To evaluate the ISO depth of cure of bulkfill composites and depth of cure which determined by Vickers microhardness test. Materials and Methods: Bulkfill resin composite specimens (n=150) were prepared of three bulkfill composite materials (
Mohannad R A, Luma MS Baban
doaj   +1 more source

Effect of different light-curing techniques on hardness of a microhybrid dental composite resin

open access: yesBrazilian Dental Science, 2014
Objective: This study assessed the Vickers hardness provided by two LCUs when using (1) direct and indirect light-curing techniques, (2) 40 and 60 seconds and (3) top and bottom surfaces. Material and Methods: One halogen Curing Light 2500 (3M Espe) and
Alessandra Nara de Souza Rastelli   +4 more
doaj   +1 more source

Realization of High Efficiency and Low Damage Machining of Anisotropic KDP Crystal by Grinding [PDF]

open access: yes, 2019
Potassium dihydrogen phosphate (KDP) is a non-linear material used in various opto-electronic applications including Q-switches, high-speed photography shutters, frequency harmonic generation lens and Pockels cells in the Inertial Confinement Fusion (ICF)
Cai, Rui   +4 more
core   +1 more source

Influence of different polishing materials in the material removal of steel samples [PDF]

open access: yes, 2018
The quality of injection moulded polymer optic parts depends on the surface finish of the respective mould. In order to improve and control the surface finish of the mould it is important to be able to keep the material removal constant during the ...
Almeida, Rui   +3 more
core   +2 more sources

Influence of Coiling Temperature on Microstructure, Precipitation Behaviors and Mechanical Properties of a Low Carbon Ti Micro-Alloyed Steel

open access: yesMetals, 2020
The microstructural evolution, nanosized precipitation behaviors and mechanical properties of a Ti-bearing micro-alloyed steel at different coiling temperatures were studied using optical microstructure (OM), scanning electron micrograph (SEM ...
Mingxue Sun, Yang Xu, Wenbo Du
doaj   +1 more source

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