Csikor F, Motz C, Weygand D, Zaiser M, Zapperi S (2007)
Publication Status: Published
Publication Type: Journal article, Original article
Publication year: 2007
Publisher: AMER ASSOC ADVANCEMENT SCIENCE
Book Volume: 318
Pages Range: 251-254
Journal Issue: 5848
Under stress, many crystalline materials exhibit irreversible plastic deformation caused by the motion of lattice dislocations. In plastically deformed microcrystals, internal dislocation avalanches lead to jumps in the stress-strain curves (strain bursts), whereas in macroscopic samples plasticity appears as a smooth process. By combining three-dimensional simulations of the dynamics of interacting dislocations with statistical analysis of the corresponding deformation behavior, we determined the distribution of strain changes during dislocation avalanches and established its dependence on microcrystal size. Our results suggest that for sample dimensions on the micrometer and submicrometer scale, large strain fluctuations may make it difficult to control the resulting shape in a plastic-forming process.
APA:
Csikor, F., Motz, C., Weygand, D., Zaiser, M., & Zapperi, S. (2007). Dislocation avalanches, strain bursts, and the problem of plastic forming at the micrometer scale. Science, 318(5848), 251-254. https://doi.org/10.1126/science.1143719
MLA:
Csikor, Ferenc, et al. "Dislocation avalanches, strain bursts, and the problem of plastic forming at the micrometer scale." Science 318.5848 (2007): 251-254.
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