Observations of Deformation and Fracture Mechanisms in Nanolayered Metallic Structures

Published

January 1, 2002

Author(s)

Timothy J. Foecke, D E. Kramer, P M. Anderson

Abstract

It is known that metallic nanostructured materials possess mechanical properties far in excess of those predicted by standard models such as the Hall-Petch relationship. In metallic nanolaminates, we have observed some of the dislocation behaviors that produce these high strengths. Concomitant to this, a dramatic reduction in overall plasticity to failure is generally reported at the smallest layer thicknesses, exhibiting brittle behavior even for FCC constitutent metals. However, when examined closely, the fracture surface still shows ductile rupture. In situ TEM observations of crack growth in Cu/Ni nanolaminates illustrate the localization mechanisms that operate at these length scales.

Citation

International Conference on Plasticity

Pub Type

Journals

Keywords

dislocation, fracture, nanolaminates, nanomaterials

Citation

Foecke, T. , Kramer, D. and Anderson, P. (2002), Observations of Deformation and Fracture Mechanisms in Nanolayered Metallic Structures, International Conference on Plasticity (Accessed April 19, 2024)