TITLE

Enhanced yield strength of materials: The thinness effect

AUTHOR(S)
Jennett, N. M.; Ghisleni, R.; Michler, J.
PUB. DATE
September 2009
SOURCE
Applied Physics Letters;9/21/2009, Vol. 95 Issue 12, p123102
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We show that yield strength is determined by “thinness” i.e., by the smallest dimension of a structure. Compressing wall-like structures of different length to width ratio, using a NanoindenterXP, has allowed us to distinguish between proposed plasticity size effect theories by determining the dimensional dependence of uniaxial plastic deformation of small pillars. We show that yield stress is determined by wall width; the length of the wall making little or no difference. Thus thin structures exhibit the same enhanced yield strength regardless of total size (volume) or surface to volume ratio; nanolayers are as strong as nanoparticles.
ACCESSION #
44374785

 

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