PT Journal
AU Petrik, J
   Palfy, P
   Blasko, P
   Girmanova, L
   Havlik, M
TI The Indentation Size Effect (ISE) and the Speed of the Indenter Penetration into Test Piece
SO Manufacturing Technology Journal
PY 2016
BP 771
EP 777
VL 16
IS 4
DI 10.21062/ujep/x.2016/a/1213-2489/MT/16/4/771
DE Micro-hardness; ISE; Speed of the indenter in the test piece; Load
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.
ER