|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Mechanical Behavior at the Nanoscale III
||Anisotropy, Size, and Aspect Ratio Effects in Micropillar Compression of Al-SiC Nanolaminate Composites
||Carl Mayer, Yang Lingwei, Sudhanshu S Singh, Yu-Lin Shen, Jon Molina-Aldareguia, Javier LLorca,
|On-Site Speaker (Planned)
Metal-ceramic nanolaminate composites exhibit extremely high strength and toughness. The vast majority of studies investigating the mechanical properties of multilayer composites focus only on loading in the direction normal to the layers. Our work uses a combination of micropillar compression and finite element modeling (FEM) to characterize the mechanical properties in three different orientations: 0, 45, and 90 degrees from the layer orientation. Additionally, multiple pillar geometries, were used to elucidate the size and aspect ratio effect on the response. Layer bending plays a major role in the deformation of the 0 and 45 orientations. This layer bending behavior was observed in FEM simulations which utilized initial layer waviness (which is observed in the experimental structure), highlighting the importance of these nanostructural details on deformation. The influence of size and aspect ratio on fracture stress and the use of Weibull statistics to quantify the size effect will be discussed.
||Planned: A print-only volume