Showing 121 - 140 results of 154 for search '"Vickers"', query time: 0.05s Refine Results
  1. 121

    Experimental Study on Water-Jet Shock Microforming Process Using Different Incident Pressures by James Kwasi Quaisie, Wang Yun, Xu Zhenying, Yu Chao, Fuzhu Li, Philip Baidoo, Joseph Sekyi-Ansah, Emmanuel Asamoah

    Published 2020-01-01
    “…In this experiment, a KEYENCE VHX-1000C digital microscope, confocal laser-scanning microscope (Axio CSM 700), and micro-Vickers hardness tester were utilized to observe the forming depth, surface quality, thickness distribution, and section hardness distributions under different incident pressures. …”
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  2. 122

    Effect of Four Bleaching Regimens on Color Changes and Microhardness of Dental Nanofilled Composite by Simone Xavier Silva Costa, Anne Buss Becker, Alessandra Nara de Souza Rastelli, Leonor de Castro Monteiro Loffredo, Marcelo Ferrarezi de Andrade, Vanderlei Salvador Bagnato

    Published 2009-01-01
    “…Color measurements were made with spectrophotometer using CIELAB color scale. The Vickers hardness (VHN) measurements were performed at the top surface. …”
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  3. 123

    Evaluating Mechanical Properties of Few Layers MoS2 Nanosheets-Polymer Composites by Muhammad Bilal Khan, Rahim Jan, Amir Habib, Ahmad Nawaz Khan

    Published 2017-01-01
    “…The high aspect ratio of MoS2 nanosheets, homogeneous dispersion inside polymer, and their probable planar orientation are the possible reasons for the effective stress transfer, resulting in enhanced mechanical characteristics. Moreover, the micro-Vickers hardness (HV) of the MoS2-PS is also improved from 19 (PS) to 23 (0.002 Vf MoS2-PS) as MoS2 nanosheets inclusion may hinder the deformation more effectively.…”
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  4. 124

    Hardness characteristics of as-cast Ni-Ru-Zr alloys by Chipise L., Batane N.R., Jain P.K., Coetzee S.H., Odera B.O., Goosen W., Cornish L.A.

    Published 2021-01-01
    “…The Vickers hardness of 21 as-cast Ni-Ru-Zr alloys of different compositions were studied, and nanohardness indentations were done on the individual phases. …”
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  5. 125

    Effect of Adding Silica Nanoparticles on the Physicochemical Properties, Antimicrobial Action, and the Hardness of Dental Stone Type 4 by Navid Aghbolaghi, Solmaz Maleki Dizaj, Ramin Negahdari, Amir Reza Jamei Khosroshahi, Yashar Rezaei, Sepideh Bohlouli, Mohammad Ali Ghavimi

    Published 2022-01-01
    “…Agar diffusion test was carried out for the prepared samples against the Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) to test the average growth inhibition zones. Finally, the Vickers surface hardness test was performed for each group using a hardness tester. …”
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  6. 126

    Efficacy of Sodium Fluoride and Fluoridated Calcium Phosphate in Mitigating Dental Erosion on Human Enamel: An In vitro Analysis by Mohammed Raihan Assadi, Darshana Devadiga, Aditya Ingle, Nainy Jain, Dheeraj Devadiga

    Published 2024-11-01
    “…All samples were subjected to Vicker’s SMH analysis, while changes in surface morphology and elemental composition were validated in few representative samples using FTIR and SEM, respectively. …”
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  7. 127

    Mechanical and microstructural characterization of graphene reinforced Alumina Ceramic matrix composite by Madhankumar Anbazhagan, Anthony Xavior Michael

    Published 2025-03-01
    “…The results indicated that increased graphene content led to a reduction in Vickers hardness, but flexural strength and fracture resistance initially enhanced, reaching a maximum for 0.5 wt%, before decreasing at elevated concentrations. …”
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  8. 128

    Sulla stima di macro, micro e nano-durezza di materiali metallici mediante analisi elasto-plastiche agli elementi finiti by Luca Susmel, David Taylor

    Published 2011-12-01
    “…Il lavoro sintetizzato nel presente articolo si pone come obiettivo primario quello di investigare lapossibilita di stimare, mediante un approccio elasto-plastico agli elementi finiti, la durezza dei materiali metalliciconvenzionali, e questo sia a livello macroscopico, che a livello microscopico, che, infine, a livello nanoscopico.Per verificare validita e accuratezza della metodologia FEM sviluppata, sono state condotte una serie di analisisperimentali su tre materiali metallici aventi caratteristiche metallurgiche estremamente diverse: una legadfalluminio (Al 7075-T6), un acciaio a basso tenore di carbonio (BS970-En3B) e, infine, un acciaio austenitico(AISI 316L). Lfindentazione Vickers e stata simulata con analisi elasto.plastiche agli elementi finiti considerandocarichi di prova nellfintervallo tra 490 N e 490 ƒÊN e calibrando le simulazioni numeriche mediante curvemonotone tensione.deformazione ottenute da prove di trazione eseguite utilizzando provini sia di dimensioneconvenzionale che aventi larghezza della zona calibrata dellfordine dei 100 ƒÊm.La sistematica comparazione tra risultati sperimentali e simulazioni numeriche ha posto in evidenza comelfaumentare del valore della durezza misurata al diminuire della dimensione dellfimpronta possa essere imputataal ruolo giocato dalla reale morfologia del materiale, ruolo che diventa predominante sulla plasticitaconvenzionale quando le dimensioni della superficie indentata diventano comparabili con le dimensioni mediedella grana cristallina delle leghe esaminate. …”
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  9. 129

    The Influence Mechanism of Deformation on the Precipitation Behavior and Mechanical Properties of 7075 Aluminum Alloy During Hot Forming-Quenching Integrated Process by Huanhuan Li, Xinhang Zhang, Wei Dai, Wei Yan, Chaomei He, Jiake Luo, Mengxing Li, Ruolin Wu, Dang Wang

    Published 2024-12-01
    “…The aging time required for peak Vickers hardness decreased with increasing deformation ratio, reflecting the promotion of precipitated phase formation and transformation by introduced dislocations. …”
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  10. 130
  11. 131

    In Vitro Investigation of Novel Peptide Hydrogels for Enamel Remineralization by Codruta Sarosi, Alexandrina Muntean, Stanca Cuc, Ioan Petean, Sonia Balint, Marioara Moldovan, Aurel George Mohan

    Published 2024-12-01
    “…This study investigates the microstructure of dental enamel following demineralization and re-mineralization processes, using DIAGNOdent scores and images obtained via scanning electron microscopy (SEM), atomic force microscopy (AFM), and microhardness (Vickers). The research evaluates the effects of two experimental hydrogels, Anti-Amelogenin isoform X (ABT260, S1) and Anti-Kallikrein L1 (K3014, S2), applied to demineralized enamel surfaces over periods of 14 and 21 days. …”
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  12. 132

    Effects of Simulation-Guided Microwave Presintering Process on the Preparation and Final Properties of Pure Ceramic Rings: Lower Sintering Temperature and Higher Mechanical Propert... by Xiao Lu, Tong-Tong Zhou, Feng-He Zhao, Xiao-Xiong Wang, Li-Xiang Chen, Yun-Ze Long

    Published 2020-01-01
    “…Comparing the final sintering temperatures and mechanical properties of the final ceramic-sintered rings obtained by microwave presintering to those obtained by conventional presintering, microwave presintered sample has a final temperature of 1400°C, which is 100°C lower than that of conventional presintering, which is 1500°C; its average grain size of 0.18 μm is dramatically smaller than that of conventional presintering, which is 0.24 μm, with about 80% of the grain sizes present in the range of 0.1-0.2 μm and a relative density of about 99%, as opposed to conventional presintering’s 70% falling between 0.2 and 0.3 μm and relative density of about 98%; the Vickers hardness and fracture toughness for microwave presintered sample reach 1550 kg·f·mm−2 and 9.05 MPa m1/2, respectively, which are both greater than 1431 kg·f·mm−2 and 8.86 MPa m1/2 in the conventional samples.…”
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  13. 133

    Temperature influence on the repair of a hardfacing coating using laser metal deposition and assessment of the repair innocuity by Wilfried Pacquentin, Pierre Wident, Jérôme Varlet, Thomas Cailloux, Hicham Maskrot

    Published 2025-06-01
    “…Local characterization using non-destructive testing, Vickers hardness measurements and microstructural examinations by scanning electron microscopy (SEM) show an excellent metallurgical quality of the repair and its interface with the original part. …”
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  14. 134

    Üniversal rezin kompozitlerin mikrosertliği, yüzey pürüzlülüğü ve renk değişimi üzerine farklı ağız gargaralarının etkileri by Ayşenur Bulut, Cansu Dağdelen Ahısha, Oya Bala, Sinem Akgül

    Published 2025-01-01
    “…Başlangıç mikrosertlik ölçümleri Vickers sertlik ölçüm cihazı, yüzey pürüzlülük ölçümleri profilometre cihazı ve renk ölçümleri ise spektrofotometre cihazı kullanılarak yapıldı. …”
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  15. 135

    Friction Properties of Alumina–Silicon Carbide–Silver–Graphene Nanoplatelet Self-Lubricating Composite Prepared by SPS Technique by Viktor Puchý, Jana Andrejovská, Richard Sedlák, Róbert Džunda, František Kromka, Ivan Petryshynets, Mária Podobová, Ladislav Falat

    Published 2024-12-01
    “…The hardness reaches 27 GPa, as tested by the Vickers microhardness method, which reflects an increase of 11% compared to Ag-GNPs-free Al<sub>2</sub>O<sub>3</sub>-SiC. …”
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  16. 136

    Biofilm formation and surface characteristics of conventional glass ionomer, resin-modified glass ionomer, and GC gold hybrid restorative material by Amutha Mathu Vimala Soorya, Vishnu Rekha Chamarthi, Mahalakshmi Krishnan, Dhanraj Kalaivanan, Santham Krishnamoorthy, Sumaiyya Saleem, Sai Sarath Kumar Kothimbakkam, Santhosh Priya Appiya Krishnan Ramnath Babu

    Published 2024-12-01
    “…The surface roughness and microhardness of specimens were evaluated using a surface profilometer and a Vickers microhardness tester, respectively. Half of the samples in each group were exposed to Streptococcus mutans suspension and the other half to Streptococcus oralis suspension. …”
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  17. 137

    Microstructure and tribological properties of WC-12Ni/Cu composite coating prepared by laser cladding on 45 steel surface by Fulong Zhang, Junquan Zhang, Lu Ping, Zhang Wentao, Shuangyu Liu, Huang Chuanjin, Zhang Qiushi, Bo Cui, Wang Binhua

    Published 2025-01-01
    “…The microhardness of the composite coatings was tested using microhardness Vickers (MHV), and the tribological performance of the composite coatings was evaluated using the friction and wear testing machine (F&WM). …”
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  18. 138

    Microstructure and tribological behavior of W-Mo alloy coating on powder metallurgy gears based on double glow plasma surface alloying technology by Wei D.-B., Liang H.-X., Li S.-Q., Li F.-K., Ding F., Wang S.-Y., Liu Z.-L., Zhang P.-Z.

    Published 2019-01-01
    “…The hardness was examined by Vickers hardness test and nanoindentation test. The tribological behavior of powder metallurgy gears before and after plasma surface alloying was evaluated on a ball-on-disc reciprocating sliding tribometer under dry sliding condition at room temperature. …”
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  19. 139

    Influence of increasing chromium content on additively manufactured tool steels: Microstructural and mechanical evolution before and after heat treatment by Nicole Ofner, Sabine Carmen Bodner, Peter Kunnas, Atacan Asci, Kevin Kutleša, Andreas Stark, Philipp Höbenreich, Christin Aumayr, Liang Wu, Christoph Turk, Jozef Keckes, Michael Meindlhumer

    Published 2025-01-01
    “…Mechanical properties, evaluated through Vickers hardness and tensile testing, revealed a decrease in hardness and tensile strength accompanied by a change of the deformation behavior from brittle to ductile with increasing Cr content and consequently increased δ-ferrite content. …”
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  20. 140

    A Comparison between Two Different Remineralizing Agents against White Spot Lesions: An In Vitro Study by Hassan Alsubhi, Mohammad Gabbani, Abdulsalam Alsolami, Mohammed Alotaibi, Jameel Abuljadayel, Waleed Taju, Omair Bukhari

    Published 2021-01-01
    “…The surface microhardness (SMH) was measured using the Vickers microhardness testing machine at baseline, after demineralization, and after treatment. …”
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