Strain bursts in plastically deforming molybdenum micro- and nanopillars
By Michael Zaiser, J. Schwerdtfeger, A. Schneider, C. Frick, Blythe G. Clark, P. Gruber, Eduard Arzt. 2008
133 citations recorded by the source corpus.
Plastic deformation of micron and sub-micron scale specimens is characterized by intermittent sequences of large strain bursts (dislocation avalanches) which are separated by regions of near-elastic loading. In the present investigation we perform a statistical characterization of strain bursts observed in stress-controlled compressive deformation of monocrystalline molybdenum micropillars. We characterize the bursts in terms of the associated elongation increments and peak deformation rates, and demonstrate that these quantities follow power-law distributions that do not depend on specimen orientation or stress rate. We also investigate the statistics of stress increments in between the bursts, which are found to be Weibull distributed and exhibit a characteristic size effect. We discuss our findings in view of observations of deformation bursts in other materials, such as face-centred cubic and hexagonal metals.
Subfields: Condensed Matter Physics, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/9c55848e07a893647742cd9fe5cd10d714db6fcd
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In Condensed Matter Physics
In Materials Chemistry
Citations in the corpus
- Micro-plasticity and recent insights from intermittent and small-scale plasticity (2017, methodology): “• As discussed by Zaiser [154, 210], it is a remarkable finding that the statistical signature of slip in fcc and bcc micro- and nano-crystals suggests the same universality of strain-burst behavior even though the flowstress controlling mechanisms are thought to be very different.”