PT  - JOURNAL ARTICLE
AU  - Petrík, Jozef
AU  - Palfy, Pavol
AU  - Blaško, Peter
AU  - Girmanová, Lenka
AU  - Havlík, Milan
TI  - The Indentation Size Effect (ISE) and the Speed of the Indenter Penetration into Test Piece
DP  - 2016 Aug 1
TA  - Manufacturing Technology Journal
PG  - 771--777
VI  - 16
IP  - 4
AID - 10.21062/ujep/x.2016/a/1213-2489/MT/16/4/771
IS  - 12132489
AB  - The aim of the submitted paper is to study the influence of the speed of the penetration of the indenter into the test piece ranging from 0.302 μm s-1 to 1.089 μm s-1 and applied load ranging from 10 g to 100 g on measured values of micro-hardness. Whereas certified reference material with defined specified hardness and its uncertainty was used as a test piece, the measurement involved indirect calibration of the tester. The influence of observed factors on measured value of the micro-hardness was evaluated by Meyer's index n, PSR method and by Analysis of Variance (ANOVA). The influence of the load on the measured value of micro-hardness is statistically significant and the relationship between applied load and micro-hardness manifests "reverse" ISE. The velocity has statistically significant effect on the micro-hardness. Meyer's index on average decreases with increasing of the speed.