10.14489/td.2016.08.pp.016-021

2016, 08 August

DOI: 10.14489/td.2016.08.pp.016-021

Potapov A.I., Gogolinskiy K.V., Syasko V.A., Umanskiy A.S., Kondratiev A.V.
METHODOLOGICAL AND METROLOGICAL ASPECTS OF MATERIALS MECHANICAL PROPERTIES MEASUREMENTS BY INSTRUMENTED INDENTATION
(pp. 16-21)

Abstract. This article deals with metrological assurance of materials mechanical properties measurements on micro and nanoscale by instrumented indentation method, the essence of this method and measurement quantities are described, sources of uncertainty are clarified. Sources of uncertainty are divided into three groups. Instrumental sources of uncertainty are sources connected with calibration of testing machine and it specific design features. Methodological sources of uncertainty are sources connected with features of calculation method and assumptions in the calculation procedure. And the last type of sources is connected with physical and mechanical properties of a test piece and influence of environmental conditions. The methods of uncertainty reduction are considered for each source. It is estimated the uncertainty of contact depth calculation connected with the changes in variable value which depends on indenter geometry. The advantages of changing the measures of hardness to a basic samples of mechanical properties to reduce uncertainties are discussed because of lots of independent uncertainty sources.

Keywords: instrumented indentation, nanoindentation, mechanical properties, hardness testing, elasticity modulus.

+ - About the Authors Click to collapse

A. I. Potapov (National Mineral Resource University, St. Petersburg, Russia)
K. V. Gogolinskiy (D. I. Mendeleyev Institute for Metrology)
V. A. Syasko (LLC Сonstanta, St. Petersburg, Russia)
A. S. Umanskiy, A. V. Kondratiev (National Mineral Resource University, St. Petersburg, Russia)

+ - References Click to collapse

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DOI: 10.14489/td.2016.08.pp.016-021

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