Articles by Ed Tobolski

Quality Test & Inspection: Not So Hard

By Ed Tobolski
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Performing accurate micro/macroindentation hardness-Vickers and Knoop-tests can be a difficult process, even under the best conditions. Preparing the surface properly to allow the optical measurement, and the manual indent measurement process, using a high-powered microscope, is time consuming and costly.
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Back To Basics: Hardness Testing

By Ed Tobolski
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Hardness, as applied to most materials, particularly metals, has been defined in many ways by physicists, metallurgists and engineers. These definitions range from a “conglomeration of properties of a material more or less related to each other” to the commonly accepted idea of “resistance to permanent indentation.” These varied definitions point out the complexity of truly defining hardness so that it satisfies all the criteria associated with the characteristics of hardness.
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 In honor of World Quality Month, we spoke to James Rooney, ASQ Past Chairman of the Board of Directors 2013, for his take on quality around the world.
For more information, read the ASQ Speaking of Quality column.
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