|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Mechanical Behavior at the Nanoscale III
||Microstructural Changes in Cu-based Multilayers
under Cyclic Sliding Contact
||Zhao-Ping Luo, Guang-Ping Zhang, Ruth Schwaiger
|On-Site Speaker (Planned)
While nanoscale multilayers show great potential for high-strength applications and improved wear behavior, size-dependent deformation and predominant mechanisms are still under debate. Plastic deformation is governed by the constraint on dislocation motion but also strongly dependent on the interface structure between layers, which directly controls the stability of the structure and the barrier strength of the interface.
In this study, Cu/Au and Cu/Cr multilayers were investigated. Sliding experiments with up to 1000 cycles were conducted using a nanoindenter. The microstructures underneath the sliding tracks were investigated by electron microscopy. While microstructural vortices and mechanical mixing is observed for Cu/Au with increasing numbers of cycles, the Cu/Cr multilayers exhibit fracture of the Cr layers and the formation of a nanocrystalline deformation zone. Furthermore, the two material systems exhibit distinct differences regarding the wear behavior. The deformation behavior will be discussed with respect to the different types of interfaces and deformation mechanisms.
||Planned: A print-only volume