Open Access

ABSTRACT

New System Based on Image Processing and Analysis Techniques for Vickers and Brinell Hardness Semi-Automatic Measurement

Victor Hugo Costa de Albuquerque¹, Tarique da Silvira Cavalcante², Pedro Pedrosa Rebouças Filho², João Manuel R. S. Tavares¹

1 Instituto de Engenharia Mecânica e Gestão Industrial (INEGI) Faculdade de Engenharia da Uni-versidade do Porto (FEUP), Departamento de Engenharia Mecânica e Gestão Industrial (DEMEGI)Rua Dr. Roberto Frias, S/N, 4200-465, Porto, PORTUGAL
2 Universidade Federal do Ceará (UFC), Centro de Tecnologia (CT), Departamento de Engenhariade Teleinformática (DETI),Campus do PICI S/N, Bloco 723, CEP. 60455-970, Fortaleza, Ceará, BRAZIL

The International Conference on Computational & Experimental Engineering and Sciences 2009, 9(1), 23-24. https://doi.org/10.3970/icces.2009.009.023

Abstract

Mechanical tests for measurement of hardness are fundamental to evaluate some metallic materials properties, like wear resistance, ductility and flow tension. The manual process for hardness measurement is very interpretive and subjective, as the reading of needed values (diameters or diagonals) of the indenter on the material in test depends directly on operator's viewpoint (parallax effect), appropriate calibration of test machine and operator's experience. Additionally, one must notice that operator's fatigue or tiredness, due to a high number of tests done, is highly prone to measurement errors. \newline In this context, the main goals of this work were the development and analyze of a semi-automatic system, based on image analysis and processing techniques, able to determine the Vickers and Brinell hardness values from indentation images. The results obtained using the system developed were compared with those obtained by the conventional manual process. From this comparison, one could conclude that the system developed obtained more accurate and faster results.

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Keywords

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