|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Nanocomposites V: Structure-Property Relationships in Nanostructured Materials
||Effects of Layer Thickness on the Mechanical Behavior of Oxidation-strengthened Zr/Nb Nanoscale Multilayers
||Jon M Molina-Aldareguia, Miguel Monclús, Mauro Callisti, Tomas Polcar, Lingwei Yang, Javier Llorca
|On-Site Speaker (Planned)
The mechanical behaviour and deformation mechanisms of magnetron-sputtered Zr/Nb nanoscale multilayers were analysed as a function of the periodicity (L = 10 and 75 nm) and annealing time at 350ºC (2–336 hrs). Annealing led to transformation of the Zr layers into ZrO2 after a few hours, while the Nb layers oxidised at a much slower rate. The volumetric expansion associated with the oxidation led to the formation of cracks at the interfaces and within the ZrO2 layers for the multilayers with L = 75 nm but not in the case of L = 10 nm. The strength increased significantly after annealing. The nanolaminate with L = 10 nm presented the highest strength and toughness as damage during oxidation was suppressed, and a deformation behaviour controlled by the formation of shear bands.
||Planned: Supplemental Proceedings volume