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Displaying 26 - 50 of 98

Effect of Steel and Tungsten Carbide Ball Indenters on Rockwell Hardness Tests

November 11, 2004
Author(s)
Li Ma, Samuel R. Low III, J L. Fink
Rockwell hardness (HR) is a valuable and widely used indentation hardness test for evaluating mechanical properites of metallic materials. For the Rockwell scales that use a ball indenter, either a steel or tungsten carbide (WC) ball indenter is permitted

Characterizing Rockwell Diamond Indenters Using Depth of Penetration

November 1, 2004
Author(s)
R -. Ellis, P Mumford, Samuel Low, A Knott
Diamond indenters used in a Rockwell hardness tester can dramatically affect the performance of the test. For this reason, it is important to find a method that can characterize the indenter. Current methods of verifying diamond indenter geometry have

Comparative Measurements of Slovenian and USA Rockwell C Hardness Scales

June 1, 2004
Author(s)
A -. Stibler, Samuel Low, R -. Ellis
A national scale is set up for each hardness scale representing the reference hardness values in each country. From metrological and international trade aspects agreement between the national scales is very important. Good agreement makes possible good

Modeling, Simulation and Prediction of Rockwell Hardness Indentation

February 1, 2004
Author(s)
Li Ma, Samuel R. Low III, Richard J. Fields, Roland deWit, Jun-Feng Song, Theodore V. Vorburger, J Zhou
Rockwell hardness test, as a measure of the resistance of a material to localized plastic deformation, is a valuable and widely used mechanical test. However, the accuracy of Rockwell hardness measurement is still in question. The indenter, including both

Effects of Bending in Brass Rockwell B Scale Test Blocks

June 2, 2003
Author(s)
Samuel R. Low III, J L. Fink
As part of a project to produce primary hardness reference blocks for the Rockwell B hardness scale at the National Institute of Standards and Technology (NIST), studies were conducted to observe the stability of the hardness value of the blocks over a

Evolutions in Hardness Scales Definition

June 1, 2003
Author(s)
G Barbato, A G. Germak, K -. Herrmann, Samuel Low
A conventional characteristic of hardness measurements in the strong dependency on the official definition of each scale. For this reason, and to assure a good connection between National Metrology Institutes (NMIs), scientific organizations (e.g., IMEKO1