Determining effective radius and frame compliance in spherical nanoindentation

作者：Kang Seung Kyun; Kim Young Cheon; Lee Yun Hee; Kim Ju Young^*; Kwon Dongil

来源：Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 2012, 538: 58-62.

DOI：10.1016/j.msea.2012.01.013

• Nanoindentation
• Spherical indenter
• Frame compliance
• Tip bluntness
• Elastic modulus

We estimate effective radii of a spherical nanoindenter at various indentation depths using Hertz elastic contact theory for the fully elastic contact region and AFM profiling residual indentation marks for the elastoplastic contact region. Using frame compliance measured as a function of indentation depth and the concept of infinitesimal deformation of a spherical nanoindenter, we introduce a profile of indentation-depth-dependent frame compliance that successfully explains the variation in frame compliance over the entire contact region. After using this indentation-depth-dependent frame compliance, we evaluated more consistent indenter radii from Hertz elastic contact theory at shallow indentation depths (<90 nm).

• 出版日期2012-3-15