Specific features of the damage nucleation stage under severe loading of copper
Abstract
The nucleation and evolution of damage in annealed coarsely crystalline M1-type copper subjected to fast loading to a pressure P ∼ 32 GPa, followed by the action of tensile stresses σ p with an intensity of ≈-2.0 GPa for a time t ≈ 0.3-1.5 μs, have been investigated numerically and experimentally. It has been shown that, at a specific combination of amplitude-time characteristics of the tensile stress pulse, damage localization in some cases at t < 1 μs has been observed in zones (∼10-14 mm in size) alternating with "dead" zones (∼3-5 mm in size) containing no visible damages. Pores are connected by "yield streamlets." The existing multistage models of fracture kinetics have neither explained nor predicted the formation of a "band" damage structure or the presence of "yield streamlets" in specimens.
- Publication:
-
Physics of the Solid State
- Pub Date:
- April 2011
- DOI:
- 10.1134/S1063783411040068
- Bibcode:
- 2011PhSS...53..768B