Indenter tip radius and load frame compliance calibration using nanoindentation loading curves
Indenter tip radius and load frame compliance calibration using nanoindentation loading curves
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DOI：
10.1080/095008399176698
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发表时间：
1999-09
影响因子：
1.2
通讯作者：
Y. Sun;S. Zheng;T. Bell;J. Smith
中科院分区：
文献类型：
--
作者：
Y. Sun;S. Zheng;T. Bell;J. Smith
本文用有限元法模拟了各种各向同性弹塑性材料在具有完全尖锐尖端和不同半径的圆形尖端的刚性圆锥压头作用下的压痕过程。对所得加载曲线的分析表明，可以从加载曲线确定纳米压痕仪的载荷框架柔度Cf和压头的尖端圆度r。在真实的压痕实验中，加载阶段的载荷-深度关系可以用深度与载荷平方根的二阶多项式关系来描述，并由此确定了Cf和r值。因此，提出了一个实验程序的CF和r校准使用的硬和各向同性材料的加载曲线。熔融石英的纳米压痕实验证明了所提出的技术的可靠性，准确和快速的Cf和r校准。
The finite-element method has been used to simulate the indentation process of a variety of isotropic elastic-plastic materials indented by a rigid conical indenter with a perfectly sharp tip and round tips of various radii. Analyses of the obtained loading curves showed that the load frame compliance Cf of the nanoindentation instrument and the tip roundness r of the indenter can be determined from the loading curve. In a real indentation experiment, the obtained raw load-depth data during the loading stage can be described by the second-order polynomial dependence of depth on the square root of load, from which the Cf and r values are determined. An experimental procedure has thus been proposed for Cf and r calibration using the loading curves of a hard and isotropic material. Nanoindentation experiments on fused silica demonstrate the reliability of the proposed technique for accurate and quick Cf and r calibration.