Effect of Loading Schemes on the Depth-Sensing Indentation Tests
Zhang, JM
College of Physics and Information Technology, Shaanxi Normal University,&br;Xian 710062, Shaanxi, China.

Xu, KW
State Key Laboratory for Mechanical Behavior of Materials, Xian Jiaotong&br;University, Xian 710049, Shaanxi, China.

Guelorget, B


(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 (&hdot;/h), even if indentation size effects (ISE) exist in the materials. 4) The relationship between P˙/P and &hdot;/h can be shown to be P˙/P=n·(&hdot;/h).

Keywords:
copper, depth-sensing indentation test, Depth-Sensing Indentation Tests, hardness, strain rate

Paper ID: JTE11967
DOI: 10.1520/JTE11967

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Author Zhang, JM Affiliation College of Physics and Information Technology, Shaanxi Normal University,&br;Xian 710062, Shaanxi, China. Author Xu, KW Affiliation State Key Laboratory for Mechanical Behavior of Materials, Xian Jiaotong&br;University, Xian 710049, Shaanxi, China. Author Guelorget, B Affiliation Author Zhang JM, Xu KW, Guelorget B Title Effect of Loading Schemes on the Depth-Sensing Indentation Tests Symposium , Committee: on