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| Estimations of work hardening exponents of engineering metals using residual indentation profiles of nano-indentation Byung-Min Kim/Chan-Joo Lee/Jung-Min Lee
The Journal of Mechanical Science and Technology, vol. 24, no. 1, pp.73-76, 2010
Abstract : This study was designed to predict work hardening exponent n of materials from AFM (atomic force microscope) observations of residual
indentation impression in sharp indentations. FE simulations of nano-indentation were performed to 140 combinations to each
parameter (elastic modulus E, yield stress σ y , work hardening exponent n, and Poisson's ratio ν ) expressing elastic-plastic behaviors
of universal engineering metals. Using the results from FE simulations and dimensional analysis, dimensionless functions were established
to correlate residual indentation profiles with the work hardening exponent. This function was examined with nano-indentation,
tensile test, and AFM observations after indentation for two materials (Al6061-T6 and copper).
Keyword :
Nano-indentation; Work hardening exponent; AFM observation; Engineering metal
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