%0 Journal Article
%T The Influence of the Load on the Hardness
%A Jozef Petr¨ªk
%A Pavol Palfy
%J Metrology and Measurement Systems
%D 2011
%I 
%R 10.2478/v10178-011-0005-5
%X The objective of the submitted paper is to analyze the influence of the load on the calibration of micro-hardness and hardness testers. The results were validated by Measurement Systems Analysis (MSA), Analysis of Variance (ANOVA) and Z-score. The relationship between the load and micro-hardness in calibration of micro-hardness testers cannot be explained by Kick's Law (Meyer's index "n" is different from 2). The conditions of Kick's Law are satisfied at macro-hardness calibration, the values of "n" are close to 2, regardless of the applied load. The apparent micro-hardness increases with the increase of the load up to 30 g; the reverse indentation size effect (ISE) behavior is typical for this interval of the loads. The influence of the load on the measured micro-hardness is statistically significant for majority of calibrations.
%K hardness
%K load
%K calibration
%K uncertainty
%K MSA
%U http://versita.metapress.com/content/h4862v6770324qk4/?p=2974d25455c14b14bba06174b55811ba&pi=4