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Rate-change instrumented indentation for measuring strain rate sensitivity

Published online by Cambridge University Press:  31 January 2011

D. Pan
Affiliation:
World Premier International Research Center, Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan; and Institute for International Advanced Interdisciplinary Research, Tohoku University, Sendai 980-8577, Japan
M.W. Chen*
Affiliation:
World Premier International Research Center, Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan; and Institute for International Advanced Interdisciplinary Research, Tohoku University, Sendai 980-8577, Japan
*
a) Address all correspondence to this author. e-mail: mwchen@imr.tohoku.ac.jp
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Abstract

A rate-change instrumented indentation method is introduced to experimentally characterize the strain rate sensitivity of high strength materials, such as metallic glasses and nanocrystalline metals, which generally possess low rate sensitivity at room temperature. This technique has been validated herein, via self-consistency between rate jump and rate drop measurements, as a viable way to characterize rate dependent deformation behavior and thereby the underlying micromechanisms of plastic flow.

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Copyright
Copyright © Materials Research Society 2009

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