Research on dispersion in indenter and reference block for Rockwell hardness test
نویسندگان
چکیده
منابع مشابه
Capability in Rockwell C Scale Hardness
A measurement system is capable if it produces measurements with uncertainties small enough for demonstration of compliance with product specifications. To establish the capability of a system for Rock-well C scale hardness, one must assess measurement uncertainty and, when hardness is only an indicator, quantify the relation between hardness and the product property of real interest. The uncer...
متن کاملCharacterization of Rockwell hardness indenter Tip using image processing and optical profiler and evaluation of measurement uncertainty
Hardness is a measure of the resistance of a material to be penetrated and eroded by sharp projections of other materials such as diamond. The process of creating sharp projections on any test surface is known as indentation. Hardness measurement of any material is the result of a complex process of deformation during indentation. The indenter tip geometry, which includes radius of curvature at...
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WANTED: MEASUREMENTS WITH GOOD REFERENCES In nearly all types of activities-be they related to manufacturing, finance, health, regulatory affairs or even sports-people and organizations are becoming sticklers for measurement uncertainty. NIST, the nation’s measurement authority, has responded to this growing customer need for demonstrable uncertainty. It has created an on-line resource— www.nis...
متن کاملGeometric Measurement Comparisons for Rockwell Diamond Indenters
− In the uncertainty budget of Rockwell C hardness (HRC) tests, geometric error of the Rockwell diamond indenter is a major contributor. The geometric calibration of Rockwell diamond indenters has been a key issue for Rockwell hardness standardization. The National Institute of Standards and Technology (NIST) developed a microform calibration system based on a stylus instrument for the geometri...
متن کاملIndenter tip radius effect on the Nix–Gao relation in micro- and nanoindentation hardness experiments
Nix and Gao established an important relation between microindentation hardness and indentation depth. Such a relation has been verified by many microindentation experiments (indentation depths in the micrometer range), but it does not always hold in nanoindentation experiments (indentation depths approaching the nanometer range). We have developed a unified computational model for both microan...
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ژورنال
عنوان ژورنال: ACTA IMEKO
سال: 2020
ISSN: 2221-870X
DOI: 10.21014/acta_imeko.v9i5.973