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Journal articles on the topic 'Vickers hardness'

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1

Kang, Seung-Kyun, Ju-Young Kim, Chan-Pyoung Park, Hyun-Uk Kim, and Dongil Kwon. "Conventional Vickers and true instrumented indentation hardness determined by instrumented indentation tests." Journal of Materials Research 25, no. 2 (2010): 337–43. http://dx.doi.org/10.1557/jmr.2010.0045.

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We evaluate Vickers hardness and true instrumented indentation test (IIT) hardness of 24 metals over a wide range of mechanical properties using just IIT parameters by taking into account the real contact morphology beneath the Vickers indenter. Correlating the conventional Vickers hardness, indentation contact morphology, and IIT parameters for the 24 metals reveals relationships between contact depths and apparent material properties. We report the conventional Vickers and true IIT hardnesses measured only from IIT contact depths; these agree well with directly measured hardnesses within ±6%
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2

Aoyagi, Ryoji, and Kaoru Umezu. "Comparison of Ultrasonic-Hardness-Tester Hardness and Micro-Vickers Hardness." Japanese Journal of Applied Physics 46, no. 7B (2007): 4558–60. http://dx.doi.org/10.1143/jjap.46.4558.

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3

Berriche, R. "Vickers hardness from plastic energy." Scripta Metallurgica et Materialia 32, no. 4 (1995): 617–20. http://dx.doi.org/10.1016/0956-716x(95)90847-d.

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4

Sui, Yan Wei, Ai Hui Liu, Bang Sheng Li та Jing Jie Guo. "Relationship between Thickness of Lamellar α+β Phase and Mechanical Properties of Titanium Alloy". Advanced Materials Research 311-313 (серпень 2011): 1916–19. http://dx.doi.org/10.4028/www.scientific.net/amr.311-313.1916.

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Titanium alloy castings are made by means of induction melting technology. The relationships thickness of lamellar α+β phase and tensile strength, yield strength, elongation percentage, and Vickers-hardness, as well as the effect of tensile property on the Vickers-hardness are investigated for Ti-6Al-4V alloy castings. The results show that the relationships between thickness of lamellar α+β phase, and tensile strength, yield strength, specific elongation, and Vickers-hardness meet the Hall-Petch equation. And the tensile property increases linearly with Vickers-hardness.
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5

Aslanyan, A. E., E. G. Aslanyan, D. N. Pilipenko, V. V. Shvydun, A. N. Shchipunov, and L. V. Yurov. "State primary standard machine on Vickers and Knoop hardness scales GET 31-2024." Izmeritel`naya Tekhnika 73, no. 12 (2025): 7–13. https://doi.org/10.32446/0368-1025it.2024-12-7-13.

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The results of research aimed at ensuring the uniformity of hardness measurements according to the Vickers and Knoop scales, reproduction of Vickers hardness numbers HV in the range 2000–5000 and Knoop hardness numbers HK in the range 17–2500. The research is due, firstly, to the fact that the hardness of ceramics used in industry and medicine is more than 2000 HV, and hardness measurements on the Vickers scales of products made of these ceramics were not traced to the State primary special standard for metal hardness on the Vickers GET 31-2010 scales. Secondly, the Vickers tip print has a squ
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6

Shahdad, Shakeel A., John F. McCabe, Steven Bull, Sandra Rusby, and Robert W. Wassell. "Hardness measured with traditional Vickers and Martens hardness methods." Dental Materials 23, no. 9 (2007): 1079–85. http://dx.doi.org/10.1016/j.dental.2006.10.001.

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7

Chudoba, T., and M. Griepentrog. "Comparison between conventional Vickers hardness and indentation hardness obtained with different instruments." International Journal of Materials Research 96, no. 11 (2005): 1242–46. http://dx.doi.org/10.1515/ijmr-2005-0216.

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Abstract An extensive comparison between the conventional Vickers hardness at 500 mN and indentation hardness measured with Vickers indenters at 500 mN is presented for up to 20 different materials and for three different instruments. Additionally, the indentation modulus is compared to Young’s modulus, which was measured with alternative methods or taken from the literature. It is shown that the agreement between the results from depth-sensing indentation and the reference values can be improved by additional corrections, for the calculation of the indentation area. With corrections the mean
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8

Dawood Ghali Al-Rubaye, Ammar, Muhaed Sadiq Alali, and Righdan Mohsen Namus. "Investigating the correlation between Nanoindentation and Vickers hardness of Ti6Al4V, pure copper and AISI316 stainless steel." Wasit Journal of Engineering Sciences 12, no. 1 (2024): 84–92. https://doi.org/10.31185/wjes.vol12.iss1.732.

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Nano-indentation test is the most popular hardness testing method because it can correlate to other materials' mechanical properties and is used in a narrow area or for materials with plastic deformation resistance that Vickers hardness cannot represent. Linking the results of different hardness tests could provide flexibility in utilizing various hardness tests. Therefore, this research investigated the practical results of Vickers Microhardness and Berkovich Nano-indentation for three different materials. A mathematical model was applied to describe the Vickers hardness - Nano-indentation co
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9

Moshchenok, Vasyl Ivanovich, and Vasyl Vasilovich Moshchenok. "Indentation size effect when measuring Vickers hardness." Bulletin of Kharkov National Automobile and Highway University, no. 97 (August 26, 2022): 65. http://dx.doi.org/10.30977/bul.2219-5548.2022.97.0.65.

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Problem. An important aspect in the study of hardness using the Vickers pyramid is to take into account the indentation size effect. When measuring the hardness by the Vickers method, the applied load is divided by the surface area of the impression. A significant factor influencing the conformity of the hardness measurement results is the indentation size effect. The indentation size effect significantly affects the results of hardness measurements, changing their values by 20-60%. The widespread use of hardness tests is explained by a number of their advantages over other types of mechanical
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10

Valko, A. L., S. P. Rudenko, and S. G. Sandomirski. "Translation of hardness numbers in testing of surface‑hardened steel products." Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY), no. 3 (October 14, 2022): 64–69. http://dx.doi.org/10.21122/1683-6065-2022-3-64-69.

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Recalculation formulae of hardness transformation in units of HRC into Vickers hardness HV 30 for hardened and tempered structural steels in ASTM E 140-07 and ISO 18265:2013 were analyzed. From a Vickers hardness reading of 62.3 HRC using a 4.903 N indenter, the hardness is converted to 294.2 N and the hardness is converted to HRC using the ASTM E 140-07 formula. Full agreement of average hardness value HRC with reference measure is obtained. Correction factor of conversion to hardness at 294,2N and approximating relationship between hardness value HV0,2 and hardness value measured at 4,903N l
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11

Schneider, Jean-Marc, Maxence Bigerelle, and Alain Iost. "Statistical analysis of the Vickers hardness." Materials Science and Engineering: A 262, no. 1-2 (1999): 256–63. http://dx.doi.org/10.1016/s0921-5093(98)01000-4.

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12

Breval, E., and N. H. Macmillan. "Elastic recovery at Vickers hardness impressions." Journal of Materials Science Letters 4, no. 6 (1985): 741–42. http://dx.doi.org/10.1007/bf00726976.

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13

Fissel, A., M. Schenk, and A. Engel. "Vickers indentation hardness of Hg1−xCdxTe." Crystal Research and Technology 24, no. 5 (1989): 557–65. http://dx.doi.org/10.1002/crat.2170240514.

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14

Vander Voort, George F., and Ryan Fowler. "Low-Load Vickers Microindentation Hardness Testing." AM&P Technical Articles 170, no. 4 (2012): 28–33. http://dx.doi.org/10.31399/asm.amp.2012-04.p028.

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Abstract This article reviews the measurement physics of macro and micro Vickers indentation testing and the factors that determine measurement precision and repeatability. Study results show that when force loads of less than 100 gf are used, it is difficult for operators to precisely determine the position of the indenter tip, leading to various measurement errors. These errors explain the data anomalies reported in the literature for low-load Vickers hardness testing, which are often incorrectly attributed to material characteristics.
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15

Hidayat, Hidayat. "Analysis Of Load Variations On ST 60 Steel Using Vickers Method." International Journal of Science, Engineering and Information Technology 5, no. 1 (2020): 231–35. http://dx.doi.org/10.21107/ijseit.v5i1.8940.

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The use of metal in the industrial world, especially ST60 Steel, is a very vital need, this can be seen from the increasing number of machine or equipment components or construction parts made of steel. Hardness is one of the mechanical properties that is often used as a guide in selecting materials for an equipment component. To find out the hardness price of a material, various testing methods can be used, including the Vickers method, which is tested by applying a force to the indented diamond pyramid against the material for which the hardness value is determined. The amount of hardness va
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16

Azhar, Ahmad Zahirani Ahmad, Foo Tai Kong, Mohamad Hasmaliza, Manimaran Ratnam, and Zainal Arifin Ahmad. "Effect of Particle Sizes of Magnesium Oxide on Zirconia Toughened Alumina Vickers Hardness." Advanced Materials Research 173 (December 2010): 29–34. http://dx.doi.org/10.4028/www.scientific.net/amr.173.29.

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Vickers hardness of zirconia toughened alumina added MgO with different composition and particle size has been studied. Five different size of magnesium oxide particle at different composition (0.5 wt % to 0.9 wt %) were used in this experiment. Each batch of composition was mixed, uniaxially pressed into 13 mm pellets and sintered at 1600oC for 4 hours in pressureless conditions. Analysis of Vickers hardness, microstructural observation and EDX analysis has been carried out. Microstructural observation showed that the addition of magnesium oxide greatly affected zirconia toughened alumina mic
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17

SAKAGUCHI, Shuji, and Fumihiro WAKAI. "Relations between Rockwell Hardness and Vickers Hardness in Engineering Ceramics." Journal of the Ceramic Association, Japan 94, no. 1094 (1986): 1109–11. http://dx.doi.org/10.2109/jcersj1950.94.1094_1109.

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18

Zhao, Man, Xia Ji, Beizhi Li, and Steven Y. Liang. "Effect of crystallographic orientation on the hardness of polycrystalline materials AA7075." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 233, no. 9 (2018): 3182–92. http://dx.doi.org/10.1177/0954406218802935.

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As one of the most important properties of materials, micro-hardness is influenced by material microstructure significantly. The reported data show that the micro-hardness of materials varies with the variation of crystallographic orientation. This paper presents an analytical model to quantify the effect of crystallographic orientation on micro-hardness by analyzing the mechanical behavior in the test of Vickers hardness. The plastic deformation occurs under the micro-indentation with the flow stress affected significantly by crystallographic orientation of material. This paper develops a Tay
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19

Yang, Wang, Jing Wang, Yi Liang Zhang, and Yang Liu. "Experimental Researches on Relation between Martens Hardness and Traditional Mechanical Properties." Applied Mechanics and Materials 189 (July 2012): 205–9. http://dx.doi.org/10.4028/www.scientific.net/amm.189.205.

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For finding the relation between Martens hardness and Vickers hardness, Rockwell hardness, tensile strength, yield strength, research are done on carbon alloy steel by experiment, linear regression analysis and derivation of equation .Martens hardness, Vickers hardness and Rockwell hardness of 30 samples which contains 3 material and 10 hardness levels are tested by ZHU 2.5 hardness tester. On the basis of 180 groups of data obtained and analyzed from instrumented indentation experiments, mathematic model between Martens hardness and Vickers hardness is established, by linear regression analys
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20

Wang, Gui Tang, Jian Lin Zhu, Pei Liang Cao, and Wen Juan Liu. "Research on Vickers Hardness Image Definition Evaluation Function." Advanced Materials Research 129-131 (August 2010): 134–38. http://dx.doi.org/10.4028/www.scientific.net/amr.129-131.134.

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A definition evaluation function is proposed for the Vickers hardness indentation images in this paper. Based on the characteristics of Vickers hardness indentation image, we choose the gradient function as definition evaluation criteria for the image. Because of the advantage of Brenner evaluation function and the image features itself, this paper puts forward a new evaluation function at the idea of Brenner evaluation function, that is not only more suitable for evaluating the Vickers hardness indentation image than Brenner function, but also having the merit of it and becoming more practica
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21

Koleňák, Roman, and Igor Kostolný. "Influence of Alloying Elements in ZnAl5 Based Alloys on Melting Temperature, Tensile Strength and Vickers Hardness." Applied Mechanics and Materials 835 (May 2016): 185–90. http://dx.doi.org/10.4028/www.scientific.net/amm.835.185.

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The aim of work consist in the investigation of the influence of alloying elements in ZnAl5 alloy on thermal and mechanical properties. The ZnAl5Cu (1-3), ZnAl5Mg (1-3), ZnAl5Ag (1-5) and ZnAl5In1(Ga1) solder alloys were used experiments. Solders were assessed by DSC analysis and by measuring tensile strength and Vickers hardness. It was found out that by adding of alloying elements, the melting temperature is decreasing. The opposite was observed in the case of ZnAl5Mg (1-3) alloys. By adding of In or Ga to ZnAl5, tensile strength and Vickers hardness are decreasing. Addition of Ag (1-5) resu
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22

RUDENKO, Sergei P., Aleksandr L. VALKO, and Sergei G. SANDOMIRSKI. "DETERMINATION OF THE EFFECTIVE THICKNESS OF HARDENED LAYER OF CARBURIZED GEARS." Mechanics of Machines, Mechanisms and Materials 3, no. 60 (2022): 61–67. http://dx.doi.org/10.46864/1995-0470-2022-3-60-61-67.

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The methods are considered for determining the effective thickness of the hardened layer of metal parts listed in the standards STB 2307-2013 and STB ISO 18203-2019. The ambiguity of interpretation of the concept of effective thickness hэф of the hardened layer up to the half-transition zone is established for control of gears after the chemical heat treatment: carburizing and hardening. In practice, hэф is determined by the Vickers hardness distribution under the relevant load. In accordance with the standard ASTM E140-07, the Vickers hardness value of 50 HRC represents the Vickers hardness o
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23

Dodi Sofyan Arief, Dodi, Muftil Badri, M. Dalil, Agus Reforiandi, and Agus Surya Permana. "Calibration Of Vickers Hardness Test PT.Tenaris Seamless Pipe Indonesia Jaya Cilegon Using Standar Blok." Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) 64, no. 3 (2020): 81–87. http://dx.doi.org/10.36842/jomase.v64i3.203.

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A calibration is an activity to determine the conventional validity of the appointment value of measuring instruments and measuring materials by comparing them to standard measurements that are traceable to national and international standards for measurement units and or international and certified reference materials. The calibration is generally a process of adjusting the output or indication of a measurement device to match the magnitude of the standard used in certain accuracy. The purpose of this paper is to find out the vickers hardness test calibration whether the machine running norma
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24

Aleksandrov Fabijanić, Tamara, Mladen Franz, and Željko Alar. "Influential factors on hardness uniformity of Vickers hardness blocks for high hardness range." Measurement 78 (January 2016): 358–65. http://dx.doi.org/10.1016/j.measurement.2015.07.030.

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25

Riyan Ariyansah and Dan Mugisidi. "Effect of air velocity variation on hardness vickers of 6061 aluminum TIG welding joints." JTTM : Jurnal Terapan Teknik Mesin 5, no. 2 (2024): 187–97. http://dx.doi.org/10.37373/jttm.v5i2.1018.

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Aluminum 6061, a commonly used metal, demands critical attention in welding due to its mechanical properties influencing structural strength. The welding of aluminum 6061 is affected by various factors, including air velocity conditions during the welding process. This research objectives to analyze Vickers hardness values in TIG-welded Aluminum 6061. The research focuses on TIG welding of aluminum 6061, analyzing the impact of air velocity variations in the welding environment on hardness values. The experimental design considers air velocity variations at 3.6 km/h, 4 km/h, and 5 km/h during
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26

Salceanu, A., M. A. Anghel, F. Iacobescu, and M. M. Poenaru. "Vickers hardness quality assessment through interlaboratories comparison." Journal of Physics: Conference Series 1065 (August 2018): 052025. http://dx.doi.org/10.1088/1742-6596/1065/5/052025.

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27

MIYAHARA, Kensuke, Nobuo NAGASHIMA, Saburo MATSUOKA, and Takahito OHMURA. "Evaluation of Vickers Hardness by Nanoindentation Measurement." Transactions of the Japan Society of Mechanical Engineers Series A 64, no. 626 (1998): 2567–73. http://dx.doi.org/10.1299/kikaia.64.2567.

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28

Hamada, Naomi, Masao Sakane, and Akihiko Hirano. "Estimation of Vickers hardness for spherical surface." Proceedings of the 1992 Annual Meeting of JSME/MMD 2004 (2004): 595–96. http://dx.doi.org/10.1299/jsmezairiki.2004.0_595.

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29

Aoki, Y., D. M. Rück, D. Vogt, K. Leible, I. Khubeis, and O. Meyer. "Vickers hardness measurement of ion implanted MgO." Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 91, no. 1-4 (1994): 247–51. http://dx.doi.org/10.1016/0168-583x(94)96225-1.

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30

Elban, W. L., D. B. Sheen, and J. N. Sherwood. "Vickers hardness testing of sucrose single crystals." Journal of Crystal Growth 137, no. 1-2 (1994): 304–8. http://dx.doi.org/10.1016/0022-0248(94)91290-4.

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31

Weiss, H. J. "On deriving vickers hardness from penetration depth." Physica Status Solidi (a) 99, no. 2 (1987): 491–501. http://dx.doi.org/10.1002/pssa.2210990219.

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32

Celej-Piszcz, Elzbieta, Leszek Szalewski, Przemyslaw Kleinrok, and Janusz Borowicz. "Mechanical properties of materials used for temporary fixed dentures – in vitro study." Current Issues in Pharmacy and Medical Sciences 30, no. 2 (2017): 61–64. http://dx.doi.org/10.1515/cipms-2017-0012.

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Abstract Objectives. The objective of the research was to define the mechanical properties of currently marketed temporary filling materials. Methods. Eight temporary filling materials: Boston, Dentalon, Protemp II, Revotek LC, Structure 2, Structure 3, UniFast LC, UniFast Trad were used to make 5 samples each of measurements 2 × 2 × 25 mm, in order to define the flexural strength, and 10 rings each of measurements 2 × 5 mm, in order to carry out the Vickers micro-hardness test. After preparation, the samples were stored in distilled water of temperature of 370°C, for 7 days. Subsequently, fle
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33

Azhar, Ahmad Zahirani Ahmad, Mohamad Hasmaliza, Manimaran Ratnam, and Zainal Arifin Ahmad. "Effect of MgO Nano Particle on Mechanical Property and Microstructure of ZTA Ceramic Composite." Advanced Materials Research 364 (October 2011): 450–54. http://dx.doi.org/10.4028/www.scientific.net/amr.364.450.

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The mechanical properties and microstructure of zirconia-toughened-alumina ceramic composite doped with nanoparticle of MgO is investigated. The nanoMgO weight percent was varied from 0.3 wt % to 1.3 wt %. Each batch of composition was mixed using ultrasonic cleaner and mechanical stirrer, uniaxially pressed and sintered at 1600 °C for 4 h in pressureless conditions. Analysis of bulk density, Vickers hardness and microstructural observation has been carried out. Results of Vickers hardness increased linearly with addition of more nanoMgO until a certain composition. Maximum Vickers hardness ob
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34

Ahmad, Mursal, Sundari Ella, and Taufikurahman. "INVESTIGASI PROSES PEMBUATAN DAN SIFAT MEKANIK PISAU PANDAI BESI DI DESA TANJUNG PINANG KABUPATEN OGAN ILIR." Machinery: Jurnal Teknologi Terapan 2, no. 1 (2021): 34–38. https://doi.org/10.5281/zenodo.4748626.

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<em>The increasing development of human life, the times also developed rapidly. In Ogan Ilir district, precisely in Tanjung Pinang village, the process of making knives or other blacksmith crafts is carried out in a traditional way and can only depend on the strength of an object from the basic material used. The main objective of this research is to determine the manufacturing process, mechanical properties and hardness. the material of the blacksmith knife is typical of Tanjung Pinang village, ogan ilir district. In this study, the fork knife made in solngen germany was chosen as a compariso
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35

Kim, Tae Bum, Masakazu Tane, Shinsuke Suzuki, Takuya Ide, Hiroshi Utsunomiya, and Hideo Nakajima. "Improvement of Strength of Lotus-Type Porous Aluminum through ECAE Process." Materials Science Forum 695 (July 2011): 263–66. http://dx.doi.org/10.4028/www.scientific.net/msf.695.263.

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Lotus-type porous aluminum with cylindrical pores oriented in one direction was deformed by Equal Channel Angular Extrusion (ECAE) through a 150° die with sequential 180° rotations, and the pore morphology and Vickers hardness after the extrusion were investigated. The Vickers hardness increases with increasing number of passes in the extrusions both parallel and perpendicular to the pore direction, accompanied by the decrease of porosity. The densification occurs more easily in the perpendicular extrusions than in the parallel extrusions, and the large deformation by the densification gives r
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36

Hu, Ming, Li Li Tang, Lin Shan, and Yun Long Zhang. "The Effect of SiC Particle Size on the Microstructure and Hardness of SiCp/Cu Composites." Advanced Materials Research 997 (August 2014): 442–45. http://dx.doi.org/10.4028/www.scientific.net/amr.997.442.

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The chemical plating technology was applied in order to improve the weaker wettability between the copper and SiC particles for electronic packaging applications. The hot-press sintering technique was executed to fabricate SiCp/Cu composites. The influence of SiC particles size on the phase constitute, micro-structure morphology and vickers hardness were investigated in details by means of X-ray diffraction, scanning electron microscope and vickers hardness tester. The results showed that SiC particle were distributed in copper matrix uniformly and interface was clear. The relative density and
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37

Malau, Viktor, and Latif Arifudin. "Vickers Microhardness Dependence Load and Determining of Tensile Strength of HQ 705 Steel from Microhardness Curves." Applied Mechanics and Materials 842 (June 2016): 43–52. http://dx.doi.org/10.4028/www.scientific.net/amm.842.43.

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Vickers microindentation hardness test has been applied for a long time to determine the mechanical properties of a small volume of samples. The procedure of this hardness test consists of using a constant load on a rigid indenter and measuring the dimensions of the indenter residual impression (indentation imprint) on the surface of the sample tested after loading and unloading. The objective of this research is to characterize the mechanical properties and material constants of HQ (High Quality) 705 alloy steel mainly its VHN (Vickers Hardness Number) and tensile strength before and after qu
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38

Niu, Junbo, Bin Miao, Jiaxu Guo, et al. "Leveraging Deep Neural Networks for Estimating Vickers Hardness from Nanoindentation Hardness." Materials 17, no. 1 (2023): 148. http://dx.doi.org/10.3390/ma17010148.

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This research presents a comprehensive analysis of deep neural network models (DNNs) for the precise prediction of Vickers hardness (HV) in nitrided and carburized M50NiL steel samples, with hardness values spanning from 400 to 1000 HV. By conducting rigorous experimentation and obtaining corresponding nanoindentation data, we evaluated the performance of four distinct neural network architectures: Multilayer Perceptron (MLP), Convolutional Neural Network (CNN), Long Short-Term Memory network (LSTM), and Transformer. Our findings reveal that MLP and LSTM models excel in predictive accuracy and
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39

Sirants, Raimonds, and Janis Lungevics. "Surface Roughness Effect on Microhardness Measurements." Tribology in Industry 47, no. 7 (2025): 92–99. https://doi.org/10.24874/ti.1777.12.24.01.

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Micro-Vickers hardness measurements are essential for evaluating micro-scale material hardness, providing insights into surface properties and material strength. However, many factors can influence the precision of hardness measurements. This study examines the influence of surface roughness on the results of micro-Vickers hardness measurements. A polished stainless steel gage block is used as a test sample. Sample surfaces are textured using different grit sandpapers. The surface texture was analysed using the 3D surface roughness measuring system. A test matrix with eight different test forc
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40

Ni, Chih Chung. "Grey Relational Grade Analysis between Vickers Hardness and Fatigue Crack Growth Data of 2024-T351 Aluminum Alloy." Advanced Materials Research 476-478 (February 2012): 2435–39. http://dx.doi.org/10.4028/www.scientific.net/amr.476-478.2435.

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Compact tension specimens cut from 2024-T351 aluminum-alloy plate were used for Vickers hardness tests under low-force scale and then for fatigue crack growth tests under sinusoidal loads, and the scattered data sets obtained including Vickers hardness, initiation cycle and specimen life, exponent m and intercept C of Paris-Erdogan law were collected as a factor set with five factor series for analysis of grey relational grade. Nominal value method was adopted for the preprocess referred to as grey relational generation to obtained new factor series, and then Hsia’s method was used to calculat
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41

Yan, Hong, Ming Fu Fu, Fa Yun Zhang, and Guo Xiang Chen. "Research on Properties of SiCp/AZ61 Magnesium Matrix Composites in Fabrication Processes." Materials Science Forum 561-565 (October 2007): 945–48. http://dx.doi.org/10.4028/www.scientific.net/msf.561-565.945.

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The microstructural structures of SiCp/AZ61magnesium matrix composite were studied in three different casting processes, and their hardness was measured. The results indicated that SiCp/AZ61 composites fabricated in stirring melt casting process, compared to those in fully liquid stirring casting process and in semi-solid stirring casting process, possessed fairly uniform distribution of SiC particulates and few porosity rate. It was an ideal metal matrix composites fabricated process. The Vickers hardness of non-reinforcement AZ61 magnesium alloy is higher than that of semi-solid billet, and
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42

Cheng, Wan-Shu, Guan-Ying Chen, Xin-Yen Shih, Mahmoud Elsisi, Meng-Hsiu Tsai, and Hong-Jie Dai. "Vickers Hardness Value Test via Multi-Task Learning Convolutional Neural Networks and Image Augmentation." Applied Sciences 12, no. 21 (2022): 10820. http://dx.doi.org/10.3390/app122110820.

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Hardness testing is an essential test in the metal manufacturing industry, and Vickers hardness is one of the most widely used hardness measurements today. The computer-assisted Vickers hardness test requires manually generating indentations for measurement, but the process is tedious and the measured results may depend on the operator’s experience. In light of this, this paper proposes a data-driven approach based on convolutional neural networks to measure the Vickers hardness value directly from the image of the specimen to get rid of the aforementioned limitations. Multi-task learning is i
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Kuzu, C., E. Pelit, and I. Meral. "A new design of Rockwell-Brinell-Vickers hardness standard machine at UME." ACTA IMEKO 9, no. 5 (2020): 230. http://dx.doi.org/10.21014/acta_imeko.v9i5.975.

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After successful implementation of two hardness standardizing machines at TSE (Turkish Standards Institution) in Rockwell and Brinell-Vickers hardness scales separately, it became unavoidable to combine them in one machine with a newer design and install it in Hardness Laboratory of UME (National Metrology Institute of Republic of Turkey) within the scope of an internally funded project. In this paper the new design of the Rockwell-Brinell- Vickers hardness standard machine with deadweight force application principle and a laser interferometer optic system as depth measurement unit for Rockwel
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Lee, Jong Il, Young Choi, Kwang Suck Boo, and Joon Hong Park. "A Study on Relationship between Hardness and Hydrostatic Stress." Key Engineering Materials 306-308 (March 2006): 619–24. http://dx.doi.org/10.4028/www.scientific.net/kem.306-308.619.

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Hardness is most likely to mean the resistance to indentation, and to the design engineer it often means an easily measured and specified quantity which indicates something about the strength and heat treatment of the metal. Especially, Vickers hardness is one of the most widely useful methods to obtain mechanical properties of a product. Firstly, in this study, a method to estimate hardness will be presented using FE simulations of Vickers hardness tests from the viewpoint that hardness indicates resistance to plastic deformation. To verify our method, the results of the simulations for sever
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Payana, Dwi, I. Made Widiyarta, and Made Sucipta. "Kekerasan Baja Karbon Sedang dengan Variasi Suhu Permukaan Material." Jurnal METTEK 4, no. 2 (2018): 43. http://dx.doi.org/10.24843/mettek.2018.v04.i02.p02.

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Beban gesek pada permukaan sebuah benda dapat menimbulkan panas pada permukaan kontak benda tersebut. Semakin besar beban gesek yang terjadi, suhu pada permukaan material akan menjadi lebih tinggi. Peningkatan suhu permukaan yang semakin tinggi dapat mempengaruhi sifat mekanis permukaan material dan tentunya dapat berimplikasi terhadap mekanisme kegagalan pada permukaan material tersebut, seperti kegagalan aus dan kegagalan retak. Pada penelitian ini, uji kekerasan dilakukan pada material dengan suhu permukaan tertentu. Permukaan material baja karbon sedang dipanaskan dengan variasi suhu yaitu
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46

Vandana, Kharidhi Laxman, Vangara Aditya, Kumar Reddy Sanjeeva, Lakhani Nazam, and Prasad Sakthidharan Aswin. "Enamel Hardness in Fluorosed and Nonfluorosed Teeth – An Original Research." International Journal of Medical and Oral Research 10, no. 1 (2025): 7–11. https://doi.org/10.4103/ijmo.ijmo_4_25.

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Abstract Background: Hardness, which reduces the spread of disease in various periodontal structures, is dependent on various factors. It has been reported that fluorosis tends to bring a change in the hardness but lacks information. Therefore, the aim of this study was to evaluate the Vickers hardness of periodontally healthy fluorotic and nonfluorotic enamel. Materials and Methods: Fifteen fluorotic and nonfluorotic enamel specimens were mounted in Plaster of Paris in PVC rings. They were subjected to a load of 25 g for 20 s in occlusal, middle, and cervical thirds using a Zwick/ZHV Vickers
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Varouti, Eirini, C. Giannouli, Z. Petrakou, and K. Sapountzi. "Steel Hardness Determination Using the Barkhausen Noise Effect." Key Engineering Materials 495 (November 2011): 229–32. http://dx.doi.org/10.4028/www.scientific.net/kem.495.229.

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The Barkhausen noise technique (BHN) has been used as a non destructive tool for the measurement of the hardness in various types of steel, namely low carbon steel, TRIP steel, Duplex steel and welding in low carbon steel. The steel samples have undergone different mechanical treatment, such as plastic deformation, cold rolling or welding. Hardness and microhardness have been determined in terms of Vickers standards. A remarkably linear dependence of the BHN on the Vickers hardness of the corresponding samples with an uncertainty in the order of 3-5% has been achieved, illustrating that the BH
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Qingrun, Hou, and J. Gao. "Micro-Hardness and Adhesion of Boron Carbon Nitride Coatings." Modern Physics Letters B 11, no. 16n17 (1997): 749–56. http://dx.doi.org/10.1142/s021798499700092x.

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Boron carbon nitride coatings have been synthesized by the pulsed laser deposition method. Vickers micro-hardness and adhesion of the coatings were studied. A new model was applied to determine the hardness of the coatings which were too thin to be directly measured by the Vickers micro-hardness test. An intermediate layer of silicon was used to enhance the adhesion of the coatings on stainless steel, glass, and quartz substrates.
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Yan, Lei, Xueyang Chen, Wei Li, Joseph Newkirk, and Frank Liou. "Direct laser deposition of Ti-6Al-4V from elemental powder blends." Rapid Prototyping Journal 22, no. 5 (2016): 810–16. http://dx.doi.org/10.1108/rpj-10-2015-0140.

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Purpose This paper aims to achieve Ti-6Al-4V from Ti, Al and V elemental powder blends using direct laser deposition (DLD) and to understand the effects of laser transverse speed and laser power on the initial fabrication of deposit’s microstructure and Vickers hardness. Design/methodology/approach Two sets of powder blends with different weight percentage ratio for three elemental powder were used during DLD process. Five experiments with different processing parameters were performed to evaluate how microstructure and Vickers hardness change with laser power and laser transverse speed. Energ
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Yanac - Acedo, Lourdes Magdalena, and Teresa Etelvina Ríos – Caro. "Dureza superficial y resistencia a la compresión de materiales de restauración para dientes posteriores." REVISTA ODONTOLOGÍA PEDIÁTRICA 23, no. 2 (2025): 6–13. https://doi.org/10.33738/1mspmh21.

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Objective: To compare the in vitro surface hardness and compressive strength of three direct restorative materials for posterior teeth. Methodology: This is a cross-sectional comparative experimental in vitro study. The sample consisted of 60 cylinders divided into three groups of 20 samples: Tetric N-Ceram Bulk Fill resin, Alkasite Cention-N, and Giomer Beautifil II, which were prepared using a Teflon matrix that served as a mold to prepare cylinders with the restorative materials according to ISO 4049 standards. Surface hardness was measured using the Vickers hardness tester, while compressi
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