Considerations to the hardness Brinell measurement using optical equipment

Barajas Fernandez, Cintia and Vicente Oliva, Jesús de and Caja García, Jesús and Maresca, Piera and Gómez, Emilio (2017). Considerations to the hardness Brinell measurement using optical equipment. "Procedia Manufacturing", v. 13 ; pp. 550-557. ISSN 2351-9789. https://doi.org/10.1016/j.promfg.2017.09.089.

Description

Title: Considerations to the hardness Brinell measurement using optical equipment
Author/s:
  • Barajas Fernandez, Cintia
  • Vicente Oliva, Jesús de
  • Caja García, Jesús
  • Maresca, Piera
  • Gómez, Emilio
Item Type: Article
Título de Revista/Publicación: Procedia Manufacturing
Date: 2017
Volume: 13
Subjects:
Freetext Keywords: Brinell hardness measurement; optical measurement machine; confocal microscope; profile projector
Faculty: E.T.S.I. Industriales (UPM)
Department: Física Aplicada e Ingeniería de Materiales
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

A comparison of the results obtained applying the traditional methodology to measure the Brinell hardness value with different optical equipment has been performed. The results show that the measurements on Brinell hardness indentation give neither satisfactory results, nor reproducibility nor precision with respect to certificated values. The fundamental reason is the lack of definition on the indentation edge, where the Brinell indentation diameter should be measured. This causes a high dispersion of the diameters measured with different instruments, operators or measurement parameters. In this work, we propose an alternative measurement methodology using confocal microscopy, which allows to determine a unique indentation edge. This methodology is of high interest for certification of hardness reference blocks because the results are independent of the measuring instrument and the operator.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainDPI2016-78476-PUnspecifiedUnspecifiedDESARROLLO COLABORATIVO DE PATRONES DE SOFTWARE Y ESTUDIOS DE TRAZABILIDAD E INTERCOMPARACION EN LA CARACTERIZACION METROLOGICA DE SUPERFICIES

More information

Item ID: 53330
DC Identifier: http://oa.upm.es/53330/
OAI Identifier: oai:oa.upm.es:53330
DOI: 10.1016/j.promfg.2017.09.089
Official URL: http://www.sciencedirect.com/science/article/pii/S2351978917307242
Deposited by: Memoria Investigacion
Deposited on: 19 Dec 2018 18:38
Last Modified: 19 Dec 2018 18:38
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