  The interaction between edge dislocations and carbon nanotubes (CNTs)
embedded into an Al matrix is investigated. Both pristine and Ni-coated CNTs
are considered. It is demonstrated that the embedded CNTs lead to a flow stress
contribution equivalent to that of an array of non-shearable inclusions that
are by-passed via the Orowan mechanism. The strain hardening mechanism
associated with multiple dislocation passes shows, however, characteristic
differences from the Orowan picture that indicate that the embedded CNTs behave
analogous to embedded voids.
