Open AccessA Simple Method for Measuring Plastic Properties of Power Hardening Metals via the Indentation Curve with a Large Depth
Author(s) -
Yanmei Kan,
Yiwen Wu,
Liping Ren,
Huaining Chen
Publication year - 2020
Publication title -
advances in materials science and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 42
eISSN - 1687-8442
pISSN - 1687-8434
DOI - 10.1155/2020/7372807
Subject(s) - indentation , materials science , composite material , hardening (computing) , strain hardening exponent , finite element method , ultimate tensile strength , radius , structural engineering , computer security , layer (electronics) , computer science , engineering
The spherical indentation technique provides an easy way to evaluate the integrity of in-service structures because it is nondestructive. In this study, a simple method was proposed to measure mechanical properties such as the yield strength, the ultimate tensile strength, and the strain hardening exponent from the indentation curve at a large indentation depth, which is 0.4 times of the indenter radius. Based on finite element analyses, a simple function was proposed to relate representative stress to indentation data. Besides, representative strains at different indentation depths were identified according to the load-depth curves from simulations. The calculated plastic properties from the developed method were compared well with experimental results.