Comparison of A and B type measurement uncertainties in tensile testing of metallic materials at ambient temperature

IV. International Congress on Natural and Engineering Sciences, Muğla, Türkiye, 9 - 12 Ekim 2018, ss.29

Uncertainty of Measurement in Tensile Testing has been gaining much more importance in the

last few decades due to the widespread usage of tensile in metallic materials. Main objective

of this paper is to compare the uncertainties of Type A and Type B in tensile tests of metallic

materials whose tensile tests were conducted in ambient temperature. In this scope, 60 samples

from 6 different groups were subjected to 3 different tensile tests in accordance with EN ISO

6892-1:2016 quality standards. Width, thickness and force of the samples have been measured,

then their average force, dimension and standard deviation values were calculated. Samples

have been characterized through the use of a universal tensile testing device. Tensile tests were

conducted in accordance with EN ISO 6892-1:2016 quality standards. Based on the results

obtained, measurement uncertainty of Type A was calculated at an average of 1%., whereas

measurement uncertainty of Type B was calculated at an average of 2 %., while the tensile

strength was at a confidence level of 95%. As a result of experimental studies, it was found

that in numerical precision measurements, use of Uncertainty Type A results in relatively more

precise values than Uncertainty Type B.