Determination for elasticity and plasticity from time-dependent nanoindentations

Pal Jen Wei, Jen-Fin Lin

Research output: Contribution to journalArticle

8 Citations (Scopus)


Indentation experiments of five metallic and one polymer materials were conducted by applying two pyramidal indenters under different operation conditions. All load-depth responses showed rate-dependent behaviors in various degrees. A combined method, based on the analyses developed for elastic-plastic responses of pyramidal indentations, was proposed for analyzing time-dependent indentation. Application of the combined method determined the material properties of elastic modulus and true hardness when loading and unloading coefficients and indenter inclined angle were given. For rate-dependent responses, the quasi-steady loading and unloading coefficients were determined by proper processing of h/P0.5 and P/S2 parameters, respectively. All material properties of tested materials, which were obtained from Berkovich and cube-corner indentations, are quite close to the reported values.

Original languageEnglish
Pages (from-to)90-97
Number of pages8
JournalMaterials Science and Engineering A
Issue number1-2
Publication statusPublished - 2008 Nov 25

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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