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Meeting Materials Science & Technology 2017
Symposium Fifty Years of Metallography and Materials Characterization
Presentation Title Improving the Precision of Microindentation Hardness Data
Author(s) George Frederic Vander Voort
On-Site Speaker (Planned) George Frederic Vander Voort
Abstract Scope Microindentation hardness testing is a very powerful tool for characterizing materials and diagnosing problems. We must decide which test, Knoop or Vickers, is best for the problem at hand and then choose the most appropriate test force to evaluate the problem. This is not a trivial task. The Vickers test has the advantage that the indent cavity is geometrically identical in shape as a function of the test force and the cavity depth, so HV values are statistically identical over a very wide range of test loads, as long as we use the proper optics to measure the diagonals with precision. This becomes much more difficult when the diagonals are <20 um in mean length. As will be shown, part of this problem is due to the equation used to calculate the hardness where a small measurement imprecision leads to greater and greater potential error as the diagonal becomes smaller.
Proceedings Inclusion? Planned: Publication outside of MS&T


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Delving into the World of Grain Boundaries with Electron Microscopy
How Microscopy Can Help to Save Energy, Save Lives, Create Jobs and Improve Our Health
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K-3: Automated Optical Microstructural Characterization of Thermal Spray Coatings
K-4: Advances in Automated Optical 3D Materials Characterization
Metallographic Analysis of Cu-Nb Nanolaminates Using Polarized Light Optical Microscopy
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Microstructural Developments in Dual-phase and Advanced High Strength Steels
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Oxidation Behavior of Tungsten Carbide-6% Cobalt Cemented Carbide
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Quantitative Microstructure Analysis by TriBeam Tomography
Three Dimensional (3D) Analysis of White Etching Regions in AISI M50 Bearing Steel

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