Description of the nanoindentation unloading curves with a universal function: Theoretical consideration and applications to brittle materials
Description of the nanoindentation unloading curves with a universal function: Theoretical consideration and applications to brittle materials
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具有通用函数的纳米压痕卸载曲线的描述：脆性材料的理论考虑和应用
DOI：
10.1016/j.matchemphys.2020.123165
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发表时间：
2020-09
影响因子：
4.6
通讯作者：
Danyu Jiang
中科院分区：
文献类型：
--
作者：
Jianghong Gong;Bin Deng;Danyu Jiang
传统的Oliver-Pharr（OP）法只能从一条载荷-位移（P-h）曲线上得到峰值载荷下的接触刚度，而用于计算力学性能的面积函数需要通过压痕已知模量的各向同性参考材料来预先标定。在本研究中，提出了一个通用的函数来描述纳米压痕卸载数据的基础上一个简短的理论考虑。几种脆性材料（钠钙玻璃，Y2 O3和ZrO 2）的实验数据测量的分析证实，与此通用的功能，接触刚度可以确定连续作为接触深度的函数，使用的数据记录在加载段的纳米压痕测试。此外，所获得的接触刚度与接触深度的关系，使面积函数的自校准与measuredP-h曲线，规避了一些问题与面积函数的预校准。使用确定的接触刚度和自校准的面积函数，杨氏模量的测试样品，可以得到的结果被证明是可比的传统的OP方法的输出。此外，本研究中提出的通用函数也被发现有潜在的应用在评估材料的微观结构不均匀性的压痕响应的影响。
With the traditional Oliver-Pharr (OP) method, only the contact stiffness at peak load can be obtained from one load-displacement (P-h) curve and the area function used for mechanical property calculation should be pre-calibrated by indenting an isotropic reference material of known modulus. In the present study, a universal function was proposed to describe the nanoindentation unloading data based on a brief theoretical consideration. Analyses of the experimental data measured on several brittle materials (soda-lime glass, Y2O3and ZrO2) confirmed that, with this universal function, the contact stiffness can be determined continuously as a function of contact depth using the data recorded during the loading segment of a nanoindentation test. Further, the obtained contact stiffness versus contact depth relation enables a self-calibration of area function with the measuredP-hcurve, circumventing some problems associated with pre-calibration of area function. Using the determined contact stiffness and the self-calibrated area function, Young's modulus of the test samples can be obtained and the results were shown to be comparable with the outputs of the traditional OP method. In addition, the universal function proposed in the present study was also found to have potential applications in evaluating the effect of microstructural inhomogeneity on indentation responses of materials.
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影响因子：
5.7
作者：
R. Sujith;Ravi Kumar
通讯作者：
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影响因子：
4.5
作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
Kalidindi, S. R.
DOI：
10.1007/s12541-014-0499-2
发表时间：
2014-08
影响因子：
1.9
作者：
M. Monclús;S. Lotfian;J. Molina-Aldareguia
通讯作者：
M. Monclús;S. Lotfian;J. Molina-Aldareguia
DOI：
10.1016/j.jeurceramsoc.2004.04.003
发表时间：
2005-02-01
影响因子：
5.7
作者：
Gong, JH;Peng, ZJ;Miao, HZ
通讯作者：
Miao, HZ