The various measurement methods for calibrating the indenters in achieving accurate hardness measurement are discussed. The different standards of ISO 6507 and ISO 6508 are prescribed for the use of indenters for the calibration of hardness testing machines and for the calibration of hardness reference blocks. In interference method, the position of an indenter generatix is fixed by an interferometer. This zero position is achieved if the indenter plane or generatrix is parallel to the wave front of the interferometer. The reflexion method uses a collimated beam, which is directed on an indenter plane and this method is applicable for pyramidal indenters. In autocollimation method, if commercial collimators are used, their illumination must be adapted to the small size of the indenter plane so as to receive a sufficient reflexion signal. Metrological SFM can be applied for the calibration of indenters.

Development of calibration methods for hardness indenters / Germak, ALESSANDRO FRANCO LIDIA; Herrmann, K; Dai, G; Li, Z.. - In: VDI-BERICHTE. - ISSN 0083-5560. - 1948:(2006), pp. 13-26.

Development of calibration methods for hardness indenters

GERMAK, ALESSANDRO FRANCO LIDIA;
2006

Abstract

The various measurement methods for calibrating the indenters in achieving accurate hardness measurement are discussed. The different standards of ISO 6507 and ISO 6508 are prescribed for the use of indenters for the calibration of hardness testing machines and for the calibration of hardness reference blocks. In interference method, the position of an indenter generatix is fixed by an interferometer. This zero position is achieved if the indenter plane or generatrix is parallel to the wave front of the interferometer. The reflexion method uses a collimated beam, which is directed on an indenter plane and this method is applicable for pyramidal indenters. In autocollimation method, if commercial collimators are used, their illumination must be adapted to the small size of the indenter plane so as to receive a sufficient reflexion signal. Metrological SFM can be applied for the calibration of indenters.
2006
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11696/34683
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