Results 211 to 220 of about 55,060 (259)
Some of the next articles are maybe not open access.
Hardness measured with traditional Vickers and Martens hardness methods
Dental Materials, 2007To determine the differences, if any, between hardness measured with traditional Vickers and Martens hardness test methods on denture teeth under 2, 10 and 50 N loads.Hardness of acrylic resin (VIV), composite resin (ORT) and porcelain (POR) denture tooth materials was measured using a traditional Vickers hardness (HV) method and Martens hardness (HM ...
Shahdad, SA +4 more
openaire +5 more sources
Journal of Non-Crystalline Solids, 1974
Abstract An equation has been derived for the direct calculation of Vicker's hardness number of glasses from their chemical compositions. The method is based on a consideration of deformation during indentation, which was related to Young's modulus and the average single bond strength of a glass.
M Yamane, J.D Mackenzie
openaire +1 more source
Abstract An equation has been derived for the direct calculation of Vicker's hardness number of glasses from their chemical compositions. The method is based on a consideration of deformation during indentation, which was related to Young's modulus and the average single bond strength of a glass.
M Yamane, J.D Mackenzie
openaire +1 more source
Vickers hardness concept in the light of Vickers impression
International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1974Abstract Although Vicker's hardness equation is defined with reference to the total inclined area of the permanent impression, in reality, only the diagonals are measured for calculating hardness irrespective of the morphology of the impression. The occurrence of the diagonal in the Vicker's hardness equation (Hv=2W/d2.
openaire +1 more source
Determining Temperature-Dependent Vickers Hardness with Machine Learning
The Journal of Physical Chemistry Letters, 2021Assessing the hardness of structural materials at elevated temperatures is experimentally and computationally challenging, yet crucial for their success. In this work, a machine-learning method was developed to determine a material's temperature-dependent hardness based on its chemical composition and crystal structure.
Ziyan Zhang, Jakoah Brgoch
openaire +2 more sources
Comparison of Ultrasonic-Hardness-Tester Hardness and Micro-Vickers Hardness
Japanese Journal of Applied Physics, 2007Examination methods of industrial hardnesses such as Vickers hardness and Rockwell hardness are used for the characteristic measurement of materials. These methods assume that the length of the plastic deformation is a reliable index of hardness. Since the indenters used in these methods produce deformation imprints and the methods themselves are ...
Ryoji Aoyagi, Kaoru Umezu
openaire +1 more source
Vickers hardness and compressive strength
Journal of the Mechanics and Physics of Solids, 1958Abstract Hardness and compression tests are reported for a wide variety of materials. A simple empirical method for relating hardness number to the stress-strain curve is suggested. The correlation obtained leads to the conclusion that the Vickers test is not at all sensitive to yield stresses corresponding to compressive strains greater than 0.15.
openaire +1 more source