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Materials
Published in Ansel C. Ugural, Mechanical Engineering Design, 2022
The Vickers hardness test is similar to the Brinell test. However, it uses a four-sided inverted diamond pyramid with an apex angle of 136°. The Vickers hardness number (HV) is the ratio of the impressed load to the square indented area. The Vickers hardness test is of particular value for hard, thin materials where hardness at a spot is required.
Materials
Published in Ansel C. Ugural, Youngjin Chung, Errol A. Ugural, Mechanical Engineering Design, 2020
Ansel C. Ugural, Youngjin Chung, Errol A. Ugural
The Vickers hardness test is similar to the Brinell test. However, it uses a four-sided inverted diamond pyramid with an apex angle of 136°. The Vickers hardness number (HV) is the ratio of the impressed load to the square indented area. The Vickers hardness test is of particular value for hard, thin materials where hardness at a spot is required.
Physical Properties of Steel
Published in Vladimir B. Ginzburg, Metallurgical Design of Flat Rolled Steels, 2020
Vickers hardness test is also known as the diamond pyramid hardness test which employs a diamond pyramid indenter and variable loads ranging from 1 to 120 kg. The Vickers hardness number (HV) is given as a function of the load P and the length of indentation L by the equation: HV=1.854PL2
Dielectric, electrical, magnetic, and mechanical properties of Ni-Al ferrite/PANI composite films
Published in Phase Transitions, 2022
Enas A. Arrasheed, O. M. Hemeda, Yamen A. Alibwaini, T. M. Meaz, Rizk Mostafa Shalaby, Abdul-Wali Ajlouni, A. M. A. Henaish, B. I. Salem
The X-ray diffraction patterns were recorded at room temperature in the 2θ range from 4 to 80° to characterize and confirm the formation of the prepared samples, using a Philips model (PW-1729) diffractometer.The samples morphology was investigated using SEM (JOEL, Model: JSM-5200 LV). TEM analysis was used to examine the particle distribution. Its analysis was done in a JEOL- JEM- 2100 operated at 200 kV.The complex dielectric, modulus, conductivity and impedance as a function of frequency dependency at room temperature used Alpha Analyzer, NoVo control GmbH for frequency-dependent measurements.The magnetic hysteresis loops were measured at room temperature using a vibrating sample magnetometer (VSM) operating system v 1.6 control software Oxford OX8JTL England.The standard technique used for measuring the hardness of metals is the Vickers hardness test. Vickers hardness is a measure of the hardness of a material, calculated from the size of an impression produced under load by a pyramid-shaped diamond indenter.
Influences of cryogenic CO2 and LN2 on surface integrity of inconel 625 during face milling
Published in Materials and Manufacturing Processes, 2021
The extended plastic deformation of the milled surface specimens was assessed by measuring micro-hardness from the machined surface to depth upto 0.8 mm toward the core. For the Vickers hardness test, a pyramid indentor with 136° angle and an indentation time of 10 sec was used to calculate the surface micro-hardness with the load of 500 gf using the below standard equation.
Comparative study on low energy ion beam modification of thermoplastic polymers
Published in Radiation Effects and Defects in Solids, 2019
P.M. Raveesha, K. Hareesh, S.D. Dhole, K. Asokan, Ganesh Sanjeev
The Vickers hardness test is used to measure the hardness of the material with a diamond indenter in the form of a right pyramid with a square base and an angle of 136° between opposite faces subjected to a load (37,38). Figure 6 illustrates the variation of microhardness in PC films with respect to the ion fluence.