RT Journal Article
SR Electronic
A1 Petrík, Jozef
A1 Palfy, Pavol
A1 Blaško, Peter
A1 Girmanová, Lenka
A1 Havlík, Milan
T1 The Indentation Size Effect (ISE) and the Speed of the Indenter Penetration into Test Piece
JF Manufacturing Technology Journal
YR 2016
VO 16
IS 4
SP 771
OP 777
DO 10.21062/ujep/x.2016/a/1213-2489/MT/16/4/771
UL https://journalmt.com/artkey/mft-201604-0021.php
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.