ISSN: 1945-7553
Published Online: 21 October 2004
Page Count: 4

Effect of Loading Schemes on Depth-Sensing Indentation Tests

Zhang, J-M
College of Physics and Information Technology, Shaanxi Normal University, Xian,ShaanxiChina

Xu, K-W
State Key Laboratory for Mechanical Behavior of Materials, Xian Jiaotong University, Xian,Shaanxi

Lu, J
Laboratoire des Systemes Mecaniques et D'Ingenieris Simultanee (LASMIS), Universite de Technologie de Troyes, Troyes,

Guelorget, B
Laboratoire des Systemes Mecaniques et D'Ingenieris Simultanee (LASMIS), Universite de Technologie de Troyes, Troyes,

(Received 27 May 2003; accepted 17 March 2004)

Abstract

Constant loading rate divided by load (˙P/P) indentation tests have been conducted on high purity copper at room temperature. The results show that: 1) The loading curves can be fitted to a power-law relationship of the form P = Chn and the exponent n increases with decreasing P/P. 2) The hardness value itself, and its decreasing rate with depth, increase with increasing P/P. 3) A constant P/P can result in a constant indentation strain rate (h/h), even if indentation size effects (ISE) exist in the materials. 4) The relationship between P/P and h/h can be shown to be P/P = n.(h/h).

Keywords:
copper, hardness, strain rate, depth-sensing indentation test

Paper ID: JTE11967
DOI: 10.1520/JTE11967
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