文献类型：期刊文献

英文题名：Comparison between single loading-unloading indentation and continuous stiffness indentation

作者：Jia, Yun-Fei[1];Cui, Yuan-Yuan[1];Xuan, Fu-Zhen[1];Yang, Fuqian[2]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, MOE, Key Lab Pressure Syst & Safety, Shanghai 200237, Peoples R China;[2]Univ Kentucky, Dept Chem & Mat Engn, Mat Program, Lexington, KY 40506 USA

年份：2017

卷号：7

期号：57

起止页码：35655

外文期刊名：RSC ADVANCES

收录：;EI(收录号：20173003980555);WOS:【SCI-EXPANDED(收录号:WOS:000406104300012)】；

基金：This work was sponsored by National Natural Science Foundations of China (51605164), Shanghai Sailing Program (16YF1402300), Shanghai Chenguang Program (16CG34), and the Fundamental Research Funds for the Central Universities (222201718005).

语种：英文

外文关键词：Elastic moduli - Indentation - Stainless steel - Hardness - Finite element method - Unloading - Loading - Fused silica - Yield stress

摘要：Experiments are performed on fused silica, Si, and duplex stainless steel to examine whether the CSM (continuous stiffness indentation) method will provide approximately the "same" results of contact modulus and indentation hardness as those measured from the quasi-static single loading-unloading indentation. The experimental results show that the elastic modulus measured by the CSM method is compatible with that by the quasi-static loading-unloading method for hard materials, while there exists a percentage difference of similar to 21.3% between the smallest value and the largest vale of the measured indentation hardnesses from the CSM method for fused silica and a percentage difference of similar to 15.3% between the hardnesses measured by the CSM method and the single indentation for duplex stainless steel. The large percentage difference suggests that the indentation hardness measured by the CSM method may not be compatible with that measured by the quasi-static loading-unloading method for hard materials. The finite element results reveal the percentage difference between the indentation hardness at the wave peak and that at the wave valley for the CSM method increases with the increase of the ratio of elastic modulus to yield stress.