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Modified Twoslope Method of Nanoindentation
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ZENG Wei,SHEN Yao,WAN Haibo,ZHANG Ning
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(School of Materials Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China)
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Abstract Twoslope method, which is used to calculate the materials' elastic modulus and hardness by using of nanoindentation forcedisplacement curves, was modified by the introduction of two correction parameters that account for the effect of the two factors that influence the accuracy of this method most severely. The values of the correction parameters indentation on fused silica with Berkovich indenter were obtained by FEM simulation and comparison between the experiments and standard values of fused silica. Good agreements between the values from the two ways demonstrate the capability of the modified twoslope method, and the insensitivity of the twoslope method to the wear of the indenter tip.
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Received: 25 November 2009
Published: 28 September 2010
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