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J. Petrík |
THE INFLUENCE OF THE LOAD ON THE QUALITY OF MICROHARDNESS MEASUREMENT |
Abstract
The objective of submitted work is to analyze the influence of the load on the micro-hardness of Cu, Al, Co, Ni, Fe, Zn and glass. The results were validated by Measurement Systems Analysis (MSA), Analysis of Variance (ANOVA) and Z-score. The relationship between the load and micro-hardness for measured materials can not be explained by Kick’s Law (the value of Meyer’s index “n” is different from 2). The micro-hardness increases with increasing load up to 0.2942 N; the reverse ISE behavior with n >2 is typical for this load interval. The influence of the load on the micro-hardness is statistically significant. The uncertainty decreases with increasing load and micro-hardness and of material. The capability of measurement process increases with increasing micro-hardness or Meyer’s index “n”. All results of Z-score are satisfactory.
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Keywords: hardness test|microindentation|metal| |
No 3 (2011), p. 207-216 |
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