Effect of indentation size on strain rate sensitivity of zirconia ceramics by nanoindentation
Effect of indentation size on strain rate sensitivity of zirconia ceramics by nanoindentation
复制标题
纳米压痕压痕尺寸对氧化锆陶瓷应变率敏感性的影响
DOI：
10.1007/s41779-021-00655-5
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发表时间：
2021-09-03
影响因子：
1.9
通讯作者：
Shu, Xuefeng
中科院分区：
文献类型：
--
作者：
Hao, Xin;Xiao, Gesheng;Shu, Xuefeng
采用连续刚度测量技术，在室温下对氧化锆陶瓷进行了不同应变率下的纳米压痕试验。研究了压痕尺寸效应对应变率敏感性的影响。结果表明，接触刚度随压痕深度的增加几乎呈线性增加。在不同应变速率下，接触刚度和弹性模量基本保持不变，但硬度随应变速率的增加而增加。SRS指数强烈依赖于压痕深度。通过检测硬度与压痕深度的关系，提出了一种无伊势纳米硬度的计算方法。
In this paper, nanoindentation test of zirconia ceramics was carried out under different strain rates by continuous stiffness measurement (CSM) technique at room temperature. This work aimed at studying the influence of indentation size effect (ISE) on strain rate sensitivity (SRS). The results showed that the contact stiffness increased almost linearly with the depth of the indentation. Under different strain rates, the contact stiffness and elastic modulus remain basically unchanged, but the hardness increases with the increase of the strain rate. The SRS exponentmis strongly dependent on the indentation depth. A calculation method for nano-hardness without ISE was proposed by detecting the relationship between hardness and indentation depth.